УНИВЕРСАЛЬНОЕ ПЫЛЕЗАЩИТНОЕ УСТРОЙСТВО ДЛЯ УГЛОВЫХ ШЛИФОВАЛЬНЫХ МАШИН

Универсальное пылезащитное устройство для угловых шлифовальных машин, содержащее пылезащитный кожух с пылеотводящим патрубком, опорными элементами и подвижно одним концом прикреплённым к пылезащитному кожуху качающимся рычагом, второй конец которого предназначен для жесткого крепления угловой шлифовальной машины, являющейся продолжением рычага, отличающееся тем, что пылезащитный кожух выполнен с регулируемыми направляющими для привязки к обрабатываемой поверхности, а качающийся рычаг - с двумя регулируемыми жёсткими опорами для крепления угловой шлифовальной машины, причем первая опора качающегося рычага выполнена на упомянутом втором конце рычага в виде размещенного в отверстии болта или шпильки с гайкой для прикрепления редуктора угловой шлифовальной машины, а вторая опора качающегося рычага выполнена c дополнительным упором, закрепленным на качающемся рычаге, и предназначена для прикрепления корпуса двигателя угловой шлифовальной машины, при этом качающийся рычаг выполнен с возможностью ...

ПРЕДОХРАНИТЕЛЬНЫЙ КОЖУХ ДЛЯ МЕТАЛЛООБРАБАТЫВАЮЩИХ МАШИН

1. Металлообрабатывающая машина с предохранительным кожухом, содержащая сегментный корпус, по периферии которого выполнена окантовка, а в центральной части сегментного корпуса выполнен присоединительный диск с несимметрично расположенными внутренними зубьями, а с внешней стороны сегментного корпуса прикреплен профилированный фланец, на котором по цилиндрической поверхности выполнены прямоугольные зубья, при этом на верхнем краю присоединительной поверхности рабочей головки машины выполнены несимметрично расположенные ограничительные срезы, а на присоединительной поверхности рабочей головки машины выполнен продольный канал для попадания в него фиксирующего зуба ограничительного пальца, который присоединен ограничительной втулкой и крепежным винтом к рабочей головке машины, а между нижней частью профилированного фланца и рабочей головкой машины расположена плоская волнообразная пружина, при этом на ограничительной втулке расположена возвратная пружина, верхний край которой и нижний край параллельны ее продольной оси и зафиксированы соответственно к ограничительному пальцу и рабочей головке машины, а фиксирующий зуб расположен одновременно в продольном канале и между двумя прямоугольными зубьями на профилированном фланце, причем передний опорный край фиксирующего зуба расположен в обратном направлении вращения рабочей оси машины, отличающаяся тем, что на присоединительной поверхности (9) рабочей головки (10) машины выполнен периферийный канал (25) с прямоугольным профилем, в котором расположено уплотнительное кольцо (26), разрезанное с одной стороны.2. Металлообрабатывающая машина по п. 1, отл РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 150 198 U1 (51) МПК B24B 55/05 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ТИТУЛЬНЫЙ (21)(22) Заявка: ЛИСТ ОПИСАНИЯ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2014120938/02, 26.05.2014 (24) Дата начала отсчета срока действия патента: 26.05.2014 (72) Автор(ы): КРУМОВ Венцислав Крумов (BG) (73) Патентообладатель(и): "СПАРКИ ЕЛТОС" АД ( ...

РУЧНАЯ МАШИНА

... 1. Ручная машина, прежде всего угловая шлифовальная машина, имеющая корпус (10) и стопорное устройство (11), предназначенное для установки по меньшей мере одного углового положения защитного кожуха (12) при неработающей ручной машине, отличающаяся тем, что стопорное устройство (11) расположено по меньшей мере частично внутри корпуса (10) ручной машины.2. Ручная машина по п.1, отличающаяся тем, что стопорное устройство (11) содержит по меньшей мере один орган управления, выполненный в виде нажимной кнопки (14) и предусмотренный для управления стопорным устройством (11).3. Ручная машина по п.1, отличающаяся тем, что стопорное устройство (11) содержит по меньшей мере одну пружинную дугу (16), упругодеформируемую при совершении по меньшей мере одной операции управления стопорным устройством (11).4. Ручная машина по п.3, отличающаяся тем, что стопорное устройство (11) содержит по меньшей мере один орган управления, закрепленный на пружинной дуге (16).5. Ручная машина по п.4, отличающаяся тем ...

ЗАЩИТНОЕ УСТРОЙСТВО

... 1. Защитное устройство для ручной машины (12a-12k) с вращающимся, предпочтительно дискообразным, рабочим инструментом (14a-14k), прежде всего для угловой шлифовальной машины, имеющее по меньшей мере один корпусный узел (16a-16k), отличающееся тем, что корпусный узел (16a-16k) содержит предусмотренный для деформации поглощающий элемент (18a-18k). ! 2. Защитное устройство по п.1, отличающееся тем, что поглощающий элемент (18a-18h) выполнен с профилированием (20a-20h) для восприятия кинетической энергии. ! 3. Защитное устройство по п.1, отличающееся тем, что профилирование (20а; 20b) выполнено в виде по меньшей мере одной выемки (26а; 26b), расположенной по меньшей мере на одном участке (22а; 22b) по меньшей мере одного корпусного средства (24а; 24b) корпусного узла (16а; 16b). ! 4. Защитное устройство по п.3, отличающееся тем, что выемка (26а; 26b) представляет собой удлиненное отверстие (28а; 28b), проходящее в направлении (30а; 30b), ориентированном по существу радиально наружу относительно ...

Klemmvorrichtung für ein an einer Führung verschiebbares Teil

Klemmvorrichtung für Baugruppen und/oder Zubehörteile, insbesondere elektrischer Handwerkzeugmaschinen, bei der zwei zueinander auf einer gekrümmten oder geraden Führungsbahn bewegbar gelagerte Teile (1, 4; 30, 53) aneinander arretierbar sind und wobei die Arretierkraft durch Änderung der Krümmung und damit der Sehnenlänge einer bogenförmigen Blattfeder (9, 11; 43, 44, 45) aufgebracht wird, dadurch gekennzeichnet, daß mindestens zwei Blattfedern (9, 11; 43, 44, 45) mit ihren konvexen Seiten einander zugewandt - zumindest teilweise in Schlitzen (7, 8; 40, 41, 42) eines der Teile (1, 4; 30, 53) gelagert - angeordnet sind, wobei, insbesondere mittig, zwischen den Blattfedern (9, 11; 43, 44, 45) und an deren konvexen Seiten abstützbar ein als drehbar gelagerter Vier- bzw. Mehrkant-Stellnocken (13; 37) ausgestaltetes, die Bogenkrümmung veränderndes Stellmittel angeordnet ist.

HANDSCHLEIFMASCHINE MIT VERSTELLBARER SCHUTZHAUBE

Bandschleifwerkzeug

Ein Schleifwerkzeug wird vorgesehen, welches konfiguriert ist, um zu verhindern, dass ein Federtragglied in einer Richtung geschwenkt wird, in welcher die Kompression einer Feder durch eine Druckkraft freigegeben wird, welche das Federtragglied von der Feder aufnimmt. Das Bandschleifwerkzeug hat ein Federtragglied (38), welches zwischen einer Spannungsaufbringungsposition, wo eine Drucktragfläche (46) auf einen Eingriffsteil (44) eines Federsitzes (30) drückt, um eine Feder (32) zwischen dem Federtragglied (38) und einer Rollentragstange (16) zu komprimieren und zu tragen, wodurch eine Spannung auf ein endloses Schleifband (20) aufgebracht wird, und einer Spannungsfreigabeposition schwenkbar ist, in welcher das Ausmaß der Kompression der Feder (32) verringert ist, um die Spannung zu verringern. Die Drucktragfläche (46) des Federtraggliedes (38) und der Eingriffsteil (44) des Federsitzes (30) sind so geformt, dass, wenn das Federtragglied (38) in der Spannungsaufbringungsposition ist, die ...

Tragbare Schneidmaschine

Tragbare Schneidmaschine, folgendes aufweisend: ein Trageelement, das ein Drehwerkzeug trägt, das durch die Antriebskraft einer Antriebsquelle gedreht wird, ein Schutzelement, das einen Teil des Drehwerkzeugs in dessen Umfangsrichtung abdeckt und das in Umfangsrichtung des Drehwerkzeugs verlagerbar am Trageelement angebracht ist, einen Anschlagmechanismus, der, wenn sich das Schutzelement in Bezug auf das Trageelement in Umfangsrichtung des Drehwerkzeugs bewegt, das Schutzelement in Bezug auf das Trageelement in einer vorgegebenen Position sichert, und einen Verformungsunterdrückungsmechanismus, der eine Verformung des Anschlagmechanismus in einer Richtung, die die Richtung der Kraft schneidet, unterdrückt, wenn dieser das Schutzelement anhält.

Hand tool has handle with handle part fixed to casing by elastic, vibration-damping element and fixing part fixed at elastic element

The hand tool has at least one handle (10) with at least one handle part (12), which is fixed to a casing by at least one elastic, vibration-damping element (14) and a fixing part (16) fixed at the elastic element. The handle part is connected to a moving safety element (20) with the fixing part. The safety element may be a flexible component, such as a cord, or a rigid component.

Arbeitsgerät

Ein handgeführtes Arbeitsgerät, insbesondere ein Trennschleifer (1) oder dergleichen, besitzt ein Gehäuse (2), in dem ein Antriebsmotor angeordnet ist. Der Antriebsmotor treibt ein Werkzeug an. Das Arbeitsgerät besitzt ein Lüfterrad (8), das zur Gehäuseaußenseite hin von einem Lüfterraddeckel (9) abgedeckt ist. Der Lüfterraddeckel (9) besitzt im Bereich des Lüfterrads eine Ansaugöffnung (10). Auf der Außenseite (32) des Lüfterraddeckels (9) sind Rippen (12) angeordnet, die die Ansaugöffnung (10) überspannen und die außerhalb der Ansaugöffnung (10) Kanäle (22) bilden. Um auch bei einer teilweisen Abdeckung der Außenseite (32) des Lüfterraddeckels (9) eine ausreichende Versorgung mit Kühlluft zu gewährleisten, ist vorgesehen, daß die auf die Außenseite (32) des Lüfterraddeckels (9) gewandten Oberseiten (41) der Rippen (12) eine Ansaugfläche (42) bilden, die in einem zweiten Bereich (29) quer zur Oberfläche (43) des Lüfterraddeckels (9) steht.

Vorrichtung zum Entgraten von Werkstücken

Elektrohandwerkzeugmaschine

Es wird eine Elektrohandwerkzeugmaschine für ein scheibenförmiges, rotierendes Werkzeug (18) angegeben, die ein Maschinengehäuse (11), aus dem eine Antriebsspindel (12) für das Werkzeug (18) vorsteht und an dem ein zur Antriebsspindel (12) koaxialer, hohlzylindrischer Spannhals (15) ausgebildet ist, sowie eine an das Maschinengehäuse (11) lösbar angesetzte Schutzhaube (20) zum mindestens teilweise Abdecken des Werkzeugs (18) aufweist, die über eine Spannschelle (23) mit Spannelement (24) auf dem Spannhals (15) aufsetz- und festlegbar ist. Zum Einstellen der Schutzhaube (20) in gewünschte Drehpositionen relativ zum Maschinengehäuse (11) ohne Hilfswerkzeug und zur Sicherung der Schutzhaube (20) in jeder eingestellten Drehposition ist die Spannschelle (23) drehbar auf dem Spannhals (15) gehalten und zwischen Spannschelle (23) und Spannhals (15) eine manuell lösbare Verriegelung ausgebildet (Fig. 1).

Winkelschleiferschutzhaube

The invention relates to a protective cap (1) for a right angle grinder. The inventive cap comprises a clamping device which is provided with a tightening strap (4) that is fixedly connected to the protective cap (1) for a right angle grinder. Both ends (5, 6) of said strap are configured as the first or second eyelet (7, 8) in such a way that said ends form a first or second abutment (9, 10) and can be connected to each other using a clamping force and at least two clamping elements. The first clamping element is a clamping lever (2) which can be mounted in the first eyelet (7) in a pivotable manner and around a first axis (9a) with the first end (15) thereof and can be brought into a first position, wherein the clamping device is not clamped and can be brought into a second position, wherein the clamping device is clamped. The aim of the invention is to produce said protective cap in a more cost-effective manner and still with high quality. The second clamping element is a spring (3) ...

Machine tool for rotary disk-shaped tool, has spindle terminating on upper side of retaining flange and comprising inner threads and devices for form-fittingly receiving hand tools, where inner threads of spindle receive screws

The tool has a disk-shaped device i.e. retaining flange, rotatingly driven by a spindle. A cutting disk, a polishing disk, rough-grinding disk or a slicing disk are fixed on the retaining flange by a clamping nut. The spindle terminates on an upper side of the retaining flange and comprises inner threads and devices for form-fittingly receiving hand tools. The inner threads of the spindle receive screws with outer threads, and the devices are provided in a head and/or center of the screws in an upper part of the clamping nut. The hand tools are designed as open end spanners, socket spanners or screwdrivers.

Rotary tool protective cover

A rotary tool such as a cutting-off wheel has a two-part protective cover (1) surrounding the cutting tool (2) over a peripheral angle. A first protective cover section (11) of the protective cover (1) is mounted to be integral with the tool, whereas the second protective cover section (12) is able to tilt relative to the first section (11). The tiltable protective cover section (12) supports a sliding member (40), which in the peripheral direction projects beyond the terminal edge (34) of a central web (31) remote from the stationary, first protective cover section (11). It comprises a rounded, outer sliding surface (35) remote from the central web (31) and has a blowing channel (44).

Hand-held grinding machine tool

Pole sander

A handheld pole sander comprising an electric motor. A sanding head pivotally attached to an elongate body (102, figure 2), comprises a hood 112 having a peripheral wall (160, figure 6A) on the underside and around the edge of a plate (156). A brush ring 132 is mounted inside the peripheral wall, adjacent the plate edge. The brush ring is attached to the plate via at least one leaf spring 186 or at least one wave spring, preferably formed from sheet metal and resiliently deformable in a direction perpendicular to the plane of the sheet. The brush ring may comprise a series of bristles 182 extending from the bottom side of a circular ring 180. Six leaf springs may be attached to a top side of the circular ring and extend through six apertures (166, figure 8) for attaching to a top side of the plate.

Pole sander

A handheld pole sander comprising a sanding head (100, figure 2) attached to an elongate body (102) via a pivot mechanism. An electric motor (114, figure 16) is mounted on the sanding head for rotatingly driving an output spindle (118) projecting from a hood (112). The motor is electrically controlled by control electronics 144 mounted inside a rear housing 104 on the elongate body end remote from the sanding head. The elongate body comprises first and second telescopically sliding poles 196 , 198 made from electrically conductive material, e.g. aluminium tubing. Seal(s) 204, 210, 212 and/or electrical contact(s) (218, figure 14) provide an electrical connection between overlapping parts of the electrically conducting poles. The seals are manufactured from electrically conductive material. The electrical contact may comprise a metal leaf spring, electric cable or electrical connector. The poles may be grounded by being electrically connected to neutral in the control electronics.

Protective hood rotation-locking device

Protective cover for a hand-held cutting machine

A guard for a rotatable wheel of a power tool

A guard 10 for a rotatable wheel (W fig. 2) of a power tool (T fig. 2) comprises a shroud 120 which is configured to partially enclose the wheel (W fig. 2) and a port 140 disposed at a circumferential position on the shroud via which debris generated by the wheel during use can exit the shroud, the shroud 120 comprises a radii of curvature which increases between a first angular position (P1 fig. 3B) and a second angular position (P2 fig. 3B), relative to a rotational axis of the wheel (W fig. 2), in a direction comprising a rotational direction of the wheel (W fig. 2). The radii of curvature may progressively increase between the first and second angular positions (P1, P2 fig. 3B). The radii of curvature may comprise a discontinuous change at the port 140. The wheel (W fig. 2) may extend through a window (130 fig. 2) opposite the port 140. Air may pass into the shroud though apertures 126a, 126b, 126c.

SCHMIRGELMASCHINE

ANGLE RESOLUTION FOR A DRILL PRESS

CUTTING TOOL, LIKE A WALL GROOVE MILLING CUTTER, WITH SEALANTS MISTAKES

PROTECTION HOOD FOR AN ELECTRIC POWER TOOL, IN PARTICULAR AN ANGLE SANDER AS WELL AS ELECTRIC POWER TOOL WITH A SUCH PROTECTION HOOD

HANDICRAFT THINGS MACHINE FOR A ROTARY TOOL WITH PROTECTION HOOD

HANDICRAFT THINGS MACHINE WITH PROTECTION HOOD, IN PARTICULAR ANGLE SANDER

ELECTRICAL HANDICRAFT THINGS EQUIPMENT, IN PARTICULAR AN ANGLE SANDER WITH A PROTECTION HOOD

SAFETY DIVICE

SAFETY DIVICE

TRANSPORTABLE MECHANISM FOR RECIPROCAL WORKING OVER AGAIN OF WORN BRAKE DISKS AT MOTOR VEHICLES

SPRINGING BACK SHIELD FOR DISK MEASURER TOOLS.

HAND ATTACHMENT WITH SEPARATION OR GRINDING WHEEL.

CALMING ELEMENT FOR LEAKING OUT AIR TO BODENPOLIERMASCHIENE.

EXHAUST HOOD FOR HAND-GUIDED TRENNSCHLEIFER

DUST COVER FOR SURFACE GRINDER

Sanding apparatus

Motorisch angetriebenes Handgerät mit Schutzhaube.

Für die Schleifscheibe einer motorisch angetriebenen Handschleifmaschine bestimmte Schutzhaube

SCHUTZVORRICHTUNG AN EINER HANDSCHLEIFMASCHINE.

Protective hood for grinding machine - is fastened to ring engaging with groove in bearing assembly for grinding wheel shaft

The protective hood (1) is fitted on an angle grinding machine (3) with a disc-shaped grinding wheel (21). The hood is semicircular in plan, as viewed along the axis of the grinding wheel, so as to partially enclose the grinding wheel on the side towards the body of the machine. The hood may be open underneath to allow access to the shaft (19) and fastening for the grinding disc (21). The hood is fastened to a ring (29) engaging with a groove (33) in the bearing assembly (25) for the grinding wheel shaft. The hood may be released by turning it. USE/ADVANTAGE - Protective hood for grinding machine is easy to instal and release.

Handicraft things machine.

Die Erfindung betrifft eine Handwerkzeugmaschine (10) zum Betrieb eines Trenn- oder Schleifwerkzeugs (12), mit einem Gehäuse (11), mit einer aus dem Gehäuse (11) austretenden Antriebsspindel (13) für das Trenn- oder Schleifwerkzeug (12) und mit einer Spann- und Haltevorrichtung (20), über die eine Schutzhaube (17) zum zumindest teilweisen Abdecken des Trenn- oder Schleifwerkzeugs (12) an dem Gehäuse (11) lösbar festlegbar ist. Die Spann- und Haltevorrichtung (20) weist eine über einen Spannhebelmechanismus (21), der einen Spannhebel (23) aufweist, in ihrer Schellenweite veränderbare Spannschelle (22) auf. Die Spannschelle (22) ist dabei in einer ersten Position des Spannhebels (23) entspannt und weist eine erste Schellenweite auf. In einer zweiten Position des Spannhebels (23) ist die Spannschelle (22) hingegen gespannt und weist eine kleinere Schellenweite auf als in der ersten Position des Spannhebels (23). Der Spannhebelmechanismus (21) weist ein Sperrfederelement (24) mit wenigstens ...

Handicraft things machine.

Die Erfindung betrifft eine Handwerkzeugmaschine (10) zum Betrieb eines Trenn- oder Schleifwerkzeugs (12), mit einem Gehäuse (11), mit einer aus dem Gehäuse (11) austretenden Antriebsspindel (13) für das Trenn- oder Schleifwerkzeug (12) und mit einer Spann- und Haltevorrichtung (20), über die eine Schutzhaube (17) zum zumindest teilweisen Abdecken des Trenn- oder Schleifwerkzeugs (12) an dem Gehäuse (11) lösbar festlegbar ist. Die Spann- und Haltevorrichtung (20) weist eine über einen Spannhebelmechanismus (21), der einen Spannhebel (23) aufweist, in ihrer Schellenweite veränderbare Spannschelle (22) auf. Die Spannschelle (22) ist dabei in einer ersten Position des Spannhebels (23) entspannt und weist eine erste Schellenweite auf. In einer zweiten Position des Spannhebels (23) ist die Spannschelle (22) hingegen gespannt und weist eine kleinere Schellenweite auf als in der ersten Position des Spannhebels (23). Der Spannhebelmechanismus (21) weist ein Sperrfederelement (24) mit wenigstens ...

Deburring device

Wall body grinding device for building engineering

Handheld grinding machine suitable for special-shaped wooden head

Angle grinder convenient to adjust grab handle angle

Sanding apparatus

Hand-held power tool

Intelligent grinding device is used in construction of wall body putty face

Multifunctional electric tool

Portable grinding machine convenient to use and good in protection performance

Protective device

Safety guard for a hand-guided tool

The invention relates to a protective hood for a portable tool with a rotary tool, having an axial wall for covering regions of the rotary tool. It is proposed that the axial wall (3) have wall regions (4) which are axially offset from one another and are connected to one another, in particular in one piece. Furthermore, a portable tool is proposed which has such a protective hood.

Protective cover has protective piece disposed in housing, at least one light bulb provided in one side of housing, and switch for regulating power source disposed at one end of housing

Ce couvercle protecteur est destiné à être utilisé sur une machine-outil et est constitué d'un boîtier (20) qui est muni d'un espace vide (29) et d'un compartiment récepteur (23). Une pièce protectrice (31) en matériau transparent est logée dans l'espace du boîtier (20). Un support de piles (24) est situé dans le compartiment récepteur (23). Un interrupteur (34) est disposé à une extrémité du compartiment récepteur (23) pour commuter une alimentation électrique. Deux ampoules électriques (33) sont placées à l'autre extrémité du boîtier (20). Le boîtier (20) est en outre pourvu d'une partie de fixation (25) permettant de fixer le boîtier (20) sur la machine-outil.

Rotating power grinder with drive motor housed in casing

L'invention concerne plus spécialement l'usure du capot protecteur d'un tel appareil sous l'effet de l'abrasion provoquée par la poussière de meulage projetée contre sa surface intérieure. Afin d'augmenter la durée de service du capot protecteur (5) fixé au bras de support (6) et entourant partiellement la meule discoïde (4), le côté intérieur (8) de la partie périphérique du capot (5), dirigé vers le bord coupant de la meule, est garni d'une bande d'usure (9) qui résiste à l'abrasion et est faite d'un autre matériau que le capot (5). Celui-ci est notamment en aluminium et la bande d'usure peut être en tôle d'acier. Applicable aux tronçonneuses à meule portatives ...

DEVICE FOR FIXING WITHOUT ADJUSTING TOOLS OF GRINDER COVER

... 본 발명은 그라인더 숫돌 덮개 방향 조절용 무공구 고정장치에 관한 것으로, 그라인더 기어 덮개(100)의 일측면에서 돌출된 돌출부(110); 상기 돌출부(110)의 둘레면에 요입 형성된 스프링 고정홈(120); 상기 돌출부(110)가 삽입되고, 숫돌 덮개(200)에 형성된 돌부삽입환(210); 상기 돌부삽입환(210)의 둘레 방향을 따라 간격을 두고 다수 형성된 걸림공(220); 상기 스프링 고정홈(120)에 끼워져 고정되고, 길이 일부에는 상기 걸림공(220)에 탄성적으로 걸림되는 걸림부(320)를 갖는 고정 스프링(300);을 포함하는 것을 특징으로 하는 그라인더 숫돌 덮개 방향 조절용 무공구 고정장치를 제공한다. 본 발명에 따르면, 별도의 공구를 사용하지 않고도 그라인더 숫돌 덮개의 방향을 조절할 수 있어 다양한 각도 작업시 덮개의 방향을 신속하고 편리하게 조절할 수 있는 효과를 얻을 수 있다.

BLASTING ABRASIVE RECOVERING DEVICE WHICH CAN IMPROVE WORK ENVIRONMENT BY PREVENTING THE FLYING OF FOREIGN MATERIAL AND ABRASIVE AGENT DURING BLASTING OPERATION

PURPOSE: A blasting abrasive recovering device is provided to mount one of resilient pad, magnet and roller on a ring-shaped object placing unit. CONSTITUTION: A blasting abrasive recovering device comprises a main body of container shape, a ring-shaped object placing unit(120), and a grinding and blasting gun combining unit, and an abrasive recovering unit. An opening of the main body is formed in one side. The ring-shaped object placing unit is arranged on a bottom plane of the main body along the circumference of the opening in order to be contacted with the surface of the object. A nozzle(12) of the polishing blasting gun is located in the inner part of the main body. One end of a grinding and blasting gun is inserted to the grinding and blasting gun combining unit. The abrasive recovering unit is combined in the side of the main body in order to collect the abrasive agent falling from the object. COPYRIGHT KIPO 2011 ...

APPARATUS FOR GRINDING, POLISHING OR CLEANING A SURFACE

There is described an apparatus for grinding/polishing or cleaning a surface, including at least one grinding unit (2), a motor (3), a screen (4) and a handle (5). The grinding unit is a rotatable and preferably horizontally arranged grinding cylinder (6) which is driven by the motor (3), and which in a cylinder surface is provided with a number of grinding elements (11). The screen (4) surrounds the grinding unit (2) partially, and the handle (5) is connected with the screen (4). The apparatus includes a side plate (12) and a screen (4) mounted thereon which is formed by a partly cylindric plate (13) which at its side is provided with an opening (14) through which the grinding elements (11) project, and which at its other end opposite the side plate (12) is closed by an end plate (15). The motor and the grinding cylinder (6) are mounted on the side plate (12), and the handle (5) is also mounted pivotably on the side plate about a central bearing (16) with a central axis (17) which is parallel ...

CLAMPING DEVICE FOR SECURING A PROTECTIVE HOOD TO THE NECK OF A HAND MACHINE-TOOL

A clamping device (10) for securing a protective hood (11) to the neck (12) of a hand machine-tool has a clamping strip (13) and a clamping lever (18) in the regions of its ends (16 and 17). The lever can be pivoted with one end (19) about an axis (20) in relation to the end (16) of the clamping strip (18) at that point. The lever (18) engages with a transmission member (21) which engages at a distance therefrom with the second end (17) of the clamping strip and, on being tightened, brings the ends of the strip together. The transmission member (21), the lever (18) and the clamping strip ends (16 and 17) are designed so that they form an articulated lever device which pulls the strip (13) together during tightening. At its ends the strip is subjected virtually only to tension. There are no undesirable bending moments at that point. The tension is distributed over a wide area. The lever (18) can be easily operated.

HAND OPERATED POWER TOOL

A hand operated power tool (10) comprises a housing having front and rear ends (14,16), a cutting element (20) provided towards the front end of the housing and a motor mounted within the housing, a main axis of the motor lying substantially in the plane of the cutting element, and a guard (22) mounted for movement relative to the housing between a safety position enclosing the cutting element and a cutting position in which the cutting element protrudes from the guard, wherein the guard is pivotally coupled to the housing towards the rear end of the housing.

GRINDING GUIDE ASSEMBLY FOR A HAND-HELD GRINDING MACHINE FOR BUTTONS OF A BUTTON DRILL BIT

Dust collection cover of disk grinder

A dust collection cover may be made from resin for achieving a reduction in its typical weight. In such a configuration, a disk-shaped grinding stone for grinding a steel material is preferably not attachable due to interference of an attachment-restricting portion. It is preferred that only a cup-shaped diamond wheel for work that generally does not produce heated iron powder or the like is attachable.

Protective device of power tool

A protective device of a power tool includes a fixing base having a tube portion and an abutting surface, a restricting ring fitting around the tube portion, several springs disposed between the abutting surface and a first end of the restricting ring, a protective cover having several second projections and several second recesses, and a locking member. The first end has an abutting portion. A second end of the restricting ring has several first projections and several first recesses matching with the second projections and the second recesses. The restricting ring is located between the protective cover and the abutting surface. When a blocking portion of the locking member moves to a first position, the blocking portion restricts the restricting ring from moving toward the abutting surface. When the blocking portion moves to a second position, the blocking portion leaves a position between the abutting surface and the abutting portion.

Base for sanding machines, grinding machines or the like

The present invention relates to a base for sanding machines, grinding machines or the like comprising a body (10) connectable to a machine (M) or integral therewith, said body (10) being provided with at least three supports (P) arranged in such a manner that their ends (P') lie on a plane (L) and configured in such a manner that at least one tool (T) of the machine projects at least partly beyond said plane (L) by a portion (D), said body (10) being provided with means adapted to vary the position of said plane (L) with respect to said tool (T).

GRINDING MACHINE

A grinding machine (10) includes a grinding machine body (11) and a grinding disc (12) connected to the grinding machine body (11). The grinding machine body (11) is provided with a pressure cavity (13) at a position facing the grinding disc (12) and a gas intake pipe (111) corresponding to the pressure cavity (13). A pressure release gap (14) in communication with the pressure cavity (13) is formed between the grinding machine body (11) and the grinding disc (12). The gas intake pipe (111) induces a high-pressure gas into the pressure cavity (13), which receives an effect of the high-pressure gas to become a positive-pressure environment. The high-pressure gas is continually released via the pressure release gap (14) to prohibit external dust from entering the pressure cavity (13). Thus, the grinding machine (10) is capable of preventing dust from accumulating in the pressure cavity (13) as well as effectively preventing moisture from entering the pressure cavity (13) when the grinding ...

DUST HOOD FOR A GRINDING DEVICE

GUARD FOR AN ELECTRIC MACHINE TOOL, ELECTRIC MACHINE TOOL, AND SYSTEM COMPRISING A GUARD AND ELECTRIC MACHINE TOOL

ЗАЩИТНОЕ УСТРОЙСТВО

Изобретение относится к машиностроению и может быть использовано прежде всего в ручных машинах с дискообразным и вращающимся рабочим инструментом. Защитное устройство содержит основную часть и энергопоглощающий элемент. Последний связан с основной частью с обеспечением их неподвижного соединения при нормальной работе и возможности по меньшей мере одного вращательного движения энергопоглощающего элемента относительно основной части в аварийной ситуации. Такое выполнение повышает эффективность поглощения энергии при разрыве рабочего инструмента и уменьшает опасность травмирования оператора ручной машины. 9 з.п. ф-лы, 5 ил.

РУЧНАЯ МАШИНА, ПРЕЖДЕ ВСЕГО УГЛОВАЯ ШЛИФОВАЛЬНАЯ МАШИНА

Изобретение относится к машиностроению и может быть использовано в ручных машинах, прежде всего угловых шлифовальных машинах с защитным кожухом, установленным на посадочной шейке, расположенной со стороны корпуса ручной машины, с возможностью перестановки защитного кожуха в различные угловые положения и его фиксации на посадочной шейке стяжным хомутом. Концы последнего связаны зажимным устройством с обеспечением их принудительного перемещения как в направлении затяжки стяжного хомута, так и в направлении его раскрытия. В качестве зажимного элемента использован проходящий через концы стяжного хомута зажимной винт, который на одном конце стяжного хомута установлен посредством резьбовой пары. В другой конец стяжного хомута винт упирается своей головкой, образующей упор. Предусмотрен другой упор, выполненный в виде опорной детали, входящей в углубление в стержне винта. В результате обеспечивается возможность простой и контролируемой перестановки защитного кожуха вне зависимости от предварительного ...

РУЧНАЯ МАШИНА

Изобретение относится к машиностроению и может быть использовано в ручных машинах, преимущественно в угловых шлифовальных машинах. Ручная машина содержит корпус, фланцевую посадочную шейку, защитное устройство, установленное на фланцевой посадочной шейке и образующее вместилище для рабочего инструмента, и по меньшей мере одно приспособление для демпфирования и для компенсации зазора между корпусом и защитным устройством. Упомянутое приспособление включает в себя по меньшей мере одно средство, действующее в радиальном направлении (26), и/или по меньшей мере одно средство, действующее в осевом направлении. В качестве упомянутых средств использованы демпфирующие кольца или демпфирующий материал, неподвижно закрепленный на торцевой стороне защитного устройства. Предусмотрен вариант выполнения ручной машины с фиксирующим устройством для защитного устройства, выполненным в виде стопорного рычага со стопорным кулачком и стопорного отверстия. При таком выполнении демпфирующее средство расположено ...

ТЕХНОЛОГИЧЕСКАЯ МАШИНА С ЗАЩИТНЫМ КОЖУХОМ

Изобретение относится к машиностроению и может быть использовано в технологической машине, преимущественно угловой шлифовальной машине. Машина снабжена защитным кожухом, имеющим установочное кольцо, закрепляемое посредством зажимного устройства на фланце машины. Для ограничения поворота защитного кожуха относительно фланца предусмотрено ограничительное устройство, включающее расположенный на защитном кожухе упор, который при срабатывании ограничительного устройства упирается в соответствующий ограничитель, расположенный на конструктивном элементе, соединенном с корпусом машины. Защитный кожух и зажимное устройство выполнены как отдельные конструктивные элементы. Ограничитель расположен на зажимном устройстве, а упор при взаимодействии с ограничителем ограничивает проворачивание защитного кожуха. В результате повышается безопасность технологической машины в случае разрушения рабочего инструмента. 14 з.п. ф-лы, 8 ил.

РУЧНАЯ МАШИНА С ЗАЩИТНЫМ КОЖУХОМ, ОСНАЩАЕМАЯ ВРАЩАЮЩИМСЯ РАБОЧИМ ОРГАНОМ

Изобретение относится к области машиностроения и может быть использовано в ручных машинах с защитным кожухом, имеющих вращающийся дискообразный рабочий орган. Ручная машина содержит корпус с шейкой, на которой съемно закреплен защитный кожух для ограждения рабочего органа, имеющий горловину. Для крепления защитного кожуха предусмотрен стяжной хомут. А для стопорения кожуха от проворачивания относительно шейки на стяжном хомуте (29) и на горловине (7) защитного кожуха, либо на горловине (7) защитного кожуха и на шейке (22) ручной машины, либо на горловине (7) защитного кожуха и на стяжном хомуте (29) и на шейке (22) ручной машины расположены/выполнены соответствующие профили. В результате обеспечивается возможность перестановка защитного кожуха в оптимальное положение и высокий уровень защиты оператора. 13 з.п. ф-лы, 5 ил.

ПЫЛЕСБОРНАЯ КРЫШКА ДЛЯ ДИСКОВОЙ ШЛИФОВАЛЬНОЙ МАШИНЫ

Изобретение относится к машиностроению и может быть использовано в дисковых шлифовальных машинах, имеющих пылесборную крышку. Последняя содержит вспомогательную крышку, размещенную с возможностью съема с главного корпуса крышки относительно участка, окружающего шлифовальный инструмент, с обеспечением выступания участка шлифовального инструмента из главного корпуса крышки для выполнения резки кромкой шлифовального инструмента. Главный корпус крышки и вспомогательная крышка сформованы из синтетической смолы. Главный корпус крышки выполнен с ограничительным участком крепления шлифовального инструмента к шпинделю, обеспечивающим прикрепление только чашеобразного шлифовального инструмента. В результате уменьшается вес пылесборной крышки и повышается портативность и простота использования дисковой шлифовальной машины. 4 з.п. ф-лы, 10 ил.

УСТРОЙСТВО ДЛЯ КРЕПЛЕНИЯ ЗАЩИТНОГО КОЖУХА

Изобретения относятся к ручным электрическим машинам. Для ограждения вращающегося рабочего органа электрической машины предусмотрен защитный кожух. Кожух крепится на машине посредством устройства, которое содержит два зеркально расположенных фиксирующих элемента для стопорения кожуха от проворачивания относительно корпуса машины и два рычажных органа управления. Каждый из органов управления соответствует одному из фиксирующих элементов для размыкания вручную соединения между корпусом машины и защитным кожухом. В результате обеспечивается повышение надежности крепления защитного кожуха на корпусе электрической машины за счет действия фиксирующих элементов в противоположных направлениях и уменьшение вероятности случайного разблокирования соединения за счет необходимости воздействия на два органа управления. 3 н. и 8 з.п. ф-лы, 32 ил.

ЗАЩИТНЫЙ КОЖУХ ДЛЯ РУЧНОЙ МАШИНЫ И РУЧНАЯ МАШИНА С ЗАЩИТНЫМ КОЖУХОМ

Изобретение относится к области машиностроения и может быть использовано в защитных кожухах для ручной машины. Кожух имеет корпус, опорный участок для прилегания к фланцевой опоре ручной машины и выполненное в виде стяжного хомута зажимное устройство для крепления защитного кожуха на фланцевой опоре ручной машины. Предусмотрено устройство стопорения от проворачивания для фиксации углового положения защитного кожуха относительно ручной машины. На опорном участке имеется по меньшей мере один стопорящий от проворачивания элемент, взаимодействующий по меньшей мере с одним сопряженным стопорящим от проворачивания элементом фланцевой опоры. Стяжной хомут расположен снаружи или внутри корпуса защитного кожуха. Стопорящий от проворачивания элемент выполнен за одно целое с образующей опорный участок частью корпуса или за одно целое с образующей опорный участок частью стяжного хомута, которая примыкает к корпусу, перекрывая его. В результате обеспечивается простая и эффективная конструкция, которая ...

ПЫЛЕСБОРНАЯ КРЫШКА ДЛЯ ДИСКОВОЙ ШЛИФОВАЛЬНОЙ МАШИНЫ

... 1. Пылесборная крышка дисковой шлифовальной машины, включающей шпиндель, вращаемый электродвигателем, расположенным в секции главного корпуса инструмента, и шлифовальный инструмент, прикрепленный к шпинделю, причем шпиндель прикреплен к кожуху, который с возможностью вращения поддерживает шпиндель, а шлифовальный инструмент по всей своей окружности покрыт пылесборной крышкой, причем пылесборная крыша содержит:вспомогательную крышку, размещаемую с возможностью съема с главного корпуса крышки в отношении участка, окружающего шлифовальный инструмент, и дающую возможность участку шлифовального инструмента выступать из главного корпуса крышки,при этом материал, из которого соответственно сформованы главный корпус крышки и вспомогательная крышка, является синтетической смолой,причем, предполагая в качестве шлифовального инструмента чашеобразный шлифовальный инструмент, имеющий большую высоту, и дискообразный шлифовальный инструмент, имеющий небольшую высоту в отношении высоты между участком крепления ...

РУЧНАЯ МАШИНА С ЗАЩИТНЫМ КОЖУХОМ

... 1. Ручная машина (10, 100), прежде всего угловая шлифовальная машина, имеющая корпус (12, 120) машины с посадочной шейкой (14, 140), на которой крепится защитный кожух (18, 180, 1800), предпочтительно посредством своего стяжного хомута (28, 280, 2800), фиксируемого на корпусе (22, 220, 2200) защитного кожуха, прежде всего с помощью средства основанного на геометрическом замыкании кодирования соответствия ручной машины (10, 100) и защитного кожуха (18, 180, 1800) друг другу, без которого защитный кожух (18, 180, 1800) невозможно установить на соответственно кодированной ручной машине (10, 100), отличающаяся тем, что между стяжным хомутом (28, 280, 2800) и корпусом (22, 220, 2200) защитного кожуха на участке, где предусмотрена их взаимная фиксация, расположены средства (24, 240, 2400; 26, 260, 2600) основанного на геометрическом замыкании кодирования, прежде всего входящие в зацепление друг с другом по типу шпонки и паза, без которых стяжной хомут (28, 280, 2800) невозможно легко зафиксировать ...

Safety hood for hand grinders - has two opposing impact walls to decelerate particles thrown from parting disc

Safety hood for parting discs on hand grinders, especially angle grinding machines, with two segment-shaped walls which cover the disc sides and with an arc-shaped wall which connects the side walls. Two opposing impact walls are arranged on the safety hood close to the operating point of the disc. These walls decelerate hot material particles, thrown from the operating point of the disc, by means of multiple reflection. Two plane impact walls are arranged at an acute angle to each other.

Drehendes pneumatisches Schleifgerät

Pole sander

A handheld pole sander comprising a sanding head (100, figure 2) attached to an elongate body (102) via a pivot mechanism. An electric motor (114, figure 16) is mounted on the sanding head for rotatingly driving an output spindle (118) projecting from a hood (112). The motor is electrically controlled by control electronics 144 mounted adjacent to or in direct contact with a part of the elongate body made from heat conductive material, e.g. aluminium metal tubing. Control electronics housing may be made of thermally conductive material and formed integrally with the heat conductive elongate body part. The control module 144 may be mounted inside aluminium tube 206 where part 270 of the first aluminium tube was removed. Heat generated by control electronics may be transferred to the second aluminium tube 208. Air drawn through the second tube by a vacuum cleaner may cool the control module 144.

Hand-held power tool having at least one handle

Angle grinder with grinding wheel guard

A grinding wheel guard 20 is mounted on an angle grinder 10 by means of a clamping band 28 that is clamped against a substantially cylindrical neck 30 that surrounds the angle grinder's output shaft 16. The clamping band 28 comprises sharp projections 32 that embed into the neck 30 when the wheel guard 20 is clamped to the angle grinder 10. The clamping band 28 may be made of a steel sheet, with the projections 32 being punched tongues, and the neck made of cast aluminium left in the as-cast state.

Hand-guided tool with a protective cover

Power tool and guard assembly

The improved grinder of this invention is provided with a non-circular peripheral surface encompassing an output shaft. The non-circular peripheral surface is arranged to receive a mating hole in a grinder wheel guard. The grinder wheel guard is positioned on the grinder by means of a threaded fastener or the like and is sufficiently large to house an appropriate grinder wheel. The arrangement between the non-circular peripheral surface on the grinder and the mating hole in the grinder wheel guard provides a means for transferring any load imposed on the grinder wheel guard directly into the body or housing of the grinder.

Improvements in or relating to a guard for a portable tool having a rotatable disc

... 1,107,316. Machinery guards. F. MELLOR. 2 Sept., 1965, No. 16607/67. Divided out of 1,105,308. Heading F2J. [Also in Division F4] A guard for a portable tool for cutting a horizontal slot in two walls intersecting at right angles comprises two spaced-apart straight edges 20, 22, defining an opening 30 therebetween and which abut the walls 24, 26 the edges 20, 22 being connected by a curved part 12 which generally conforms to the shape of the cutting disc 10 except at a part 28 which is connected to a vacuum apparatus for extracting spoil. In use the guard is slid along the wall the disc being slid out of the guard through the opening 30 to effect cutting an axle head (34) for the disc sliding down a slot 32 in the top of the guard, which slot bisects the angle between the edges 20, 22.

SUPPORTING TOOL & WORKPIECE

SUPPORTING TOOL AND WORKPIECE

JOINT CUTTER

GRINDER WITH EXHAUST HOOD

SHARPENING TOOL EQUIPMENT

HANDICRAFT THINGS MACHINE FOR A ROTARY TOOL WITH PROTECTION HOOD

SAFETY DIVICE

PORTABLE GRINDING FIXTURE FOR GUSSETS.

TRANSPORTABLE EINRICHTUNG ZUM BEIDSEITIGEN NACHBEARBEITEN VON VERSCHLISSENEN BREMSSCHEIBEN AN KRAFTFAHRZEUGEN

GRINDING WHEEL AND MOUNTING DEVICE

Apparatus for grinding a surface comprising two movably arranged hoods

JOINT CUTTER

The invention relates to a joint cutter comprising a tool set fitted with a drive in a housing and a casing surrounding the tool set comprising two mutually attachable sections, with a slot via which a segment of the tool set can project. An order to be able easily to cut slots even in the transition region between mutually inclined surfaces, it is proposed that a rear section of the casing be connected to the drive housing and a front section removable from the rear one cover a further segment of the tool set.

Шлифовальная стойка для угловой шлифовальной машины

Полезная модель относится к устройствам, которые обеспечивают работу угловых шлифовальных машин (УШМ). При ее помощи проводятся работы по шлифованию полов из бетона, искусственного, натурального камня и других материалов.В конструкции шлифовальной стойки три лапы, две из которых опорные. Они опираются на колеса, вращающиеся на 360°. К третьей лапе, рабочей, крепится УШМ. Угол наклона УШМ регулируется регулирующими болтами, размещенными на рабочей лапе.Благодаря особой конструкции нижнего узла стойки опорные лапы могут располагаться под разными углами одна к другой в горизонтальной плоскости, а рабочая лапа также перемещается в вертикальной плоскости. Ручки шлифовальной стойки могут перемешаться местами между собой, одна относительно другой на любой угол в горизонтальной плоскости. Рабочий во время работы занимает природное вертикальное положение. Нажатием рук рабочего на ручки управления обеспечивается устойчивость шлифовальной стойки, выбирается путь рабочего инструмента. Для переноски стойки лапы и ручки крепятся к опоре и вкладываются в чехол.Экспериментальные работы с применением шлифовальной стойки показали повышение производительность труда по сравнению с шлифованием УШМ обычным способом в два раза.Работа с применением стойки исключает негативные последствия здоровью рабочего, т.к. не вредит коленям, спине.Полезная модель изготовлена и испытана в ООО «ДИ-СТАР». Ведется подготовка производства для серийного выпуска шлифовальной стойки. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 181 139 U1 (51) МПК B24B 23/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК B24B 23/02 (2018.02) (21)(22) Заявка: 2017143684, 13.12.2017 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Общество с ограниченной ответственностью "ДИ-СТАР" (UA) Дата регистрации: 05.07.2018 (56) Список документов, цитированных в отчете о поиске: RU 2056262 C1, 20.03.1996. SU (45) Опубликовано: 05.07.2018 Бюл. № 19 1 8 1 ...

Cutting tools having movable cover mounting structures

A cutting tool includes a tool unit having a rotary cutting blade, a movable cover configured to cover the rotary cutting blade, and a rotary support member mounted to the tool unit and rotatably supporting the movable cover about a rotational axis. The rotary support member and the movable cover has contact surfaces that slidably contact with each other or slidably contact with contact surface of an intermediate member interposed between the rotary support member and the movable cover. At least one of the contact surfaces includes a groove formed therein, so that the groove can receive cutting powder or chips produced by the rotary cutting blade during a cutting operation and entering between the movable cover and the rotary support member.

Hand-held power tool system

A hand-held power tool system has a hand-held power tool, a guard unit, and a guard anti-rotation lock unit preventing rotation between the guard unit and the hand-held power tool during breakdown of a tool of the hand-held power tool and configured to prevent rotation between the guard unit and the hand-held power tool at a same time as the guard unit is being attached to the hand-held power unit when the guard unit is in a working position, the guard anti-rotation lock unit is at least partially located on a closing unit which includes a clamping band and a pivotable lever, and the anti-rotation lock unit includes at least one anti-rotation lock element provided on the lever.

Hand-held tools

A hand-held tool has an operation member operably coupled to a lock mechanism. The lock mechanism can lock and unlock the position of a cover that covers at least a part of an end tool. The operation member is positioned on an opposite side to a coupling device that movably couples the cover to a gear head device mounted to a tool body.

Protective hood for portable electric power tools, and portable electric power tools

A protective hood of portable electric power tools, and a portable electric power tool is described, and wherein a protective hood is provided and which can be selectively located relative to a rotating drive shaft, and wherein a clamping band is provided which mounts a screw that can be radially threadably advanced toward the rotating drive shaft and which further carries an anti-rotation locking element having claws which mechanically engage a machine neck thereby reliably and securely fastening the protective hood to the power tool.

Protective cover for a handheld power tool

A protective cover for a handheld power tool, with a tool that is at least partially surrounded by the protective cover, is formed of at least a first wall element and a second wall element, which in order to form a tool space are connected to each other in a parallel-spaced arrangement. The first wall element has a first circumferential section and the second wall element has a second circumferential section. The circumferential sections overlap each other and form a circumferential wall of the protective cover, with at least one opening which is provided in the outer-lying second circumferential section and under which the inner-lying first circumferential section extends.

Surface truss planer

An improved mechanism for grinding surfaces flat is presented, involving a precision grinder with grinding heads that are adjustable in a vertical dimension controlled by a support structure on wheels. The support structure has an adjustable wheelbase that allows sinusoidal flaws in a surface to be ground down in a controllable way. The device can be used in coordination with floor flatness measurement devices to grind concrete floors, and other horizontal surfaces. 1the truss frame supporting a rectangular plenum plate, a cutting motor, and a drive train under the control of a control unit,the cutting motor possessing a vertical drive shaft, the drive shaft of the cutting motor connected to cutting heads,the drive shaft of the cutting motor passing through the plenum plate, the plenum plate possessing bearings around the drive shaft of the cutting motor,the truss frame also possessing control arms and a control wheel, the control arms connecting the truss frame to and supporting the plenum plate, the adjustment wheel possessing a shaft passing horizontally through the truss frame and passing through the control arms,the adjustment shaft rotatable around its axis by means of the control wheel at one end, the combination of control wheel and control arms permitting the adjustment and positioning of the cutting heads left or right, fore or aft,the articulating wheels connected to the truss frame adjustably, allowing movement of the articulating wheels along the long axis of the truss frame,The articulating wheels adjustable a predetermined amount to affect the reshaping of the surface being planed,the articulating wheels capable of following a set of rails laid over the surface to be ground,the drive train a motor connected to one articulating wheel in such a manner as to use the articulating wheel to propel the truss planer apparatus along rails or a surface to be planed.. a truss planer, comprised of articulating wheels supporting a truss frame, This application is ...

DEVICE FOR PREVENTING REMOVAL OF A FIXING MEMBER OF A WHETSTONE COVER IN A DISC GRINDER

In a configuration in which a fixing screw is tightened and fixed between opposite ends of an attaching section of a whetstone cover, the fixing screw can be prevented from being removed from the end of the attaching section by fitting a rubber ring to a threaded shank of the fixing screw between opposite ends of the attaching section . 1. A disc grinder comprising:an electric motor;a main body housing in which the electric motor is housed;a switch provided in the main body housing;a gear housing that is located in the front of the main body housing;a boss section provided in the lower part of the gear housing; anda whetstone cover that can be fixed on the boss section, wherein:the whetstone cover includes a semicircular top plate, a lateral plate, and an attaching section;the attaching section includes a band-like sheet, a first extending part provided at one end of the band-like sheet, and a second extending part provided at the other end of the band-like sheet;a fixing nut is fixed to the first extending part;a first insertion hole is provided in the second extending part;a screw that passes through the first insertion hole and can be engaged with a fixing nut is provided;the screw has a shank; anda removal prevention device is provided at the outer circumference of the shank between the first extending part and the second extending part.2. The disc grinder according to claim 1 , wherein:a second insertion hole is provided in the first extending part; andthe shank passes through the second insertion hole.3. The disc grinder according to claim 1 , wherein:the removal prevention device consists of a ring-shaped member; andthe ring-shaped member can be made contact with the second extending part.4. The disc grinder according to claim 1 , wherein the diameter of the ring-shaped member is larger than that of the first insertion hole and the second insertion hole.5. The disc grinder according to claim 1 , wherein:the semicircular top plate has a first radial part and a ...

GRINDER

A grinder includes a body having an annular portion, a wheel cover which is attachable to the annular portion, and a wheel cover holding member which holds the wheel cover. The wheel cover has a cylindrical portion which is attachable to the annular portion. The wheel cover holding member has a slide member and a pressing portion which moves the slide member. The pressing portion switches a state between an engagement state in which the slide member is engaged with the cylindrical portion and a disengagement state in which the slide member is disengaged with the cylindrical portion by moving the slide member. The pressing member moves on a second line which is parallelly offset from a first line passing the center of the annular portion in a predetermined direction. 1. A grinder comprising:a body which has a collar;a wheel cover which is attachable to the collar; anda holding member which is adapted to hold the wheel cover fixedly to the collar,wherein the wheel cover has an annular shaped attachment portion which is attachable to the collar,wherein the holding member has an engagement portion and an engagement portion operating member to move the engagement portion, the engagement portion being engageable with the attachment portion,wherein the engagement portion operating member switches a state between an engagement state in which the attachment portion and the engagement portion are engaged to each other and a disengagement state in which the attachment portion and the engagement portion are disengaged to each other by moving the engagement portion,and wherein the engagement portion operating member moves on a second line which is parallelly offset from a first line passing a center of the attachment portion and extending in a predetermined direction.2. The grinder according to claim 1 , wherein the engagement portion is engageable with an outer edge of the attachment portion claim 1 , the outer edge being located on a line passing a central region of the ...

SANDER

A sander is of a palm type, and its upper portion is configured as a holding portion. A battery attachment portion to which a battery having an elongated shape is attachable is oriented at an angle not less than 0 degrees with respect to a vertical direction, such that if a longitudinal direction of the battery is angled, a lower portion of the battery is in a position shifted inward farther than an upper portion of the battery. 1. A sander comprising:an upper portion of the sander configured as a holding portion;an output shaft that extends in a vertical direction and configured to be aligned with the upper portion;a pad driven about the output shaft;a battery removably attached to an outside of the sander; anda motor powered by the battery and configured to drive the pad,wherein the battery is elongated along a longitudinal axis such that when the battery is attached to the sander, the longitudinal axis is oriented at an angle not less than 0 degrees with respect to the vertical direction, such that, if the longitudinal axis is angled, an inner edge lower portion of the battery is in a position shifted inward farther than an inner edge upper portion of the battery.2. The sander according to claim 1 , further comprising an attachment portion to which the battery is removably attached claim 1 , wherein the motor is disposed on a side opposite to the attachment portion with respect to a position of the holding portion.3. The sander according to claim 1 , wherein the pad is configured to receive a reduced speed driving force derived from a driving force of the motor to make a rotational motion and an eccentric motion.4. The sander according to claim 1 , wherein an inner edge of the lower portion of the battery as attached is positioned inward beyond an outer edge of the pad.5. The sander according to claim 1 , wherein the longitudinal axis of the battery is angled at an angle greater than 0 degrees and not greater than 30 degrees with respect to the vertical direction ...

SHIELD ASSEMBLY FOR A POWER TOOL

The present invention is directed toward a shield assembly for a handheld tool device such as an angle grinder. The shield assembly is selectively repositionable with respect to the cutting tool. A lock mechanism secures the shield assembly in discrete rotational positions relative to the cutting tool. The shield assembly includes a guard member and a bumper member, and an alignment feature configured to align the relative positions of guard member and the bumper member, thereby positing the members in a predetermined relative orientation. With this configuration, the shield assembly is selectively repositionable via a “hands-free” mechanism that permits a user to adjust the position of the shield assembly by simply contacting the shield assembly against a work surface. 120-. (canceled)21. A guard lock for a powered apparatus , the powered apparatus having a neck extending from a gear case , the guard lock comprising:a guard member, the guard member having a body portion for at least partially surrounding a working member of the power tool and a collar portion connected to and extending from the body portion, the collar including multiple windows that are spaced from one another,a stop lever coupled to the gear case via a fastener about which the stop lever may pivot, the stop lever including an engagement portion and a distant arm portion, the engagement portion including an angled surface and a straight surface, the fastener disposed between the engagement portion and the distal arm portion, and a bias member for biasing the engagement portion of the stop lever toward a window of the collar portion,wherein when the engagement portion is positioned within a window, rotation of the collar is permitted in a direction of the angled surface but is prevented in a direction of the straight surface, andwherein a depression of the distal arm portion toward the collar pivots the engagement portion away from the window.221. The guard lock of claim , wherein the stop lever is ...

ANGLE GRINDER COMPRISING A YAW RATE SENSOR FOR MEASURING THE HOUSING ROTATION

An angle grinder includes a housing, a drive unit configured to drive a usage tool, a sensor device configured to provide a rotation parameter, and a control unit configured to evaluate the rotation parameter to detect a clamped state of the usage tool. The sensor device has a yaw rate sensor configured to provide the rotation parameter in accordance with a rotational movement of the housing. The control unit triggers a safety mode in accordance with the rotation parameter or throttles the rotational speed and/or torque of the drive unit. 1. An angle grinder , comprising:a drive unit configured to drive an insertion tool,a sensor device configured to provide a rotation parameter, anda control and/or regulating unit configured to evaluate the rotation parameter in order to detect a jammed state of the insertion tool,wherein the sensor device has a yaw rate sensor configured to provide the rotation parameter as a function of a rotational movement of the housing.2. The angle grinder as claimed in claim 1 , wherein the yaw rate sensor is configured to provide the rotation parameter independently of an acceleration of the rotational movement of the housing.3. The angle grinder as claimed in claim 1 , wherein the control and/or regulating unit is configured to trigger a safety mode as a function of the rotation parameter provided by the yaw rate sensor.4. The angle grinder as claimed in claim 3 , wherein the control and/or regulating unit is configured to trigger the safety mode only beginning at a defined value of the rotation parameter.5. The angle grinder as claimed in claim 3 , wherein one or more of a rotational speed and a torque of the drive unit is throttled very highly in the safety mode.6. The angle grinder as claimed in claim 1 , wherein the yaw rate sensor has a sensitive axis oriented substantially coaxially with respect to a main axis of rotation of the insertion tool.7. The angle grinder as claimed in claim 1 , wherein the yaw rate sensor measures the same ...

Head structure of pneumatic tool

A head structure of a pneumatic tool has an accommodation room in a pneumatic tool body. A driving gear and a transmission unit are pivoted in the accommodation room. The transmission unit includes a gear member having a transmission gear to mesh with the driving gear. The rear end of the gear member is provided with a gear rod. A bearing fitted on the gear rod is limited to a first limit portion at the distal end of the transmission gear. The gear rod is connected with a connection member which has a second connection portion to engage with the first connection portion. The connection member has a second limit portion adapted to limit another side of the bearing. The limit member is secured to the distal end of the accommodation room. The limit member is adapted to limit the bearing in the accommodation room.

Hand-operated machine tool device

A hand-operated machine tool device, in particular for an angle grinder, includes a housing region and at least one operating element. The housing region is at least substantially rod-shaped and is configured to be used as a main gripping element. The at least one operating element extends in the housing region in a main extension direction of the housing region. The hand-operated machine tool device also has a least one mounting which supports at least one operating face of the at least one operating element such that the at least one operating element is configured to pivot about at least one axis aligned at least substantially parallel to the main extension direction.

SHARPENING APPARATUS

A portable sharpening apparatus is described. The sharpening apparatus includes a body portion and a cavity formed in the body portion for receiving an object to be sharpened. A rotatable abrasive drum capable of sharpening and having an axis of rotation is provided and the abrasive drum is located in the body portion. The apparatus further comprises a motor arranged to drive the abrasive drum and a mouth communicating with the abrasive drum and arranged in the body portion so as to direct an object to be sharpened towards the abrasive drum, wherein the mouth has a supporting means for locating an object to be sharpened at the abrasive drum, the supporting means being such that, when in use, an object to be sharpened is orientated along an axis substantially perpendicular to the axis of rotation of the abrasive drum. 1. A portable sharpening apparatus comprising:a body portion;a cavity formed in the body portion for receiving an object having a face to be sharpened;a surfacing member capable of sharpening and having an axis of operation, the surfacing member located in the body portion;a motor arranged to drive the surfacing member at the axis of operation; anda mouth communicating with the surfacing member and arranged in the body portion so as to direct an object to be sharpened towards the surfacing member,wherein the mouth comprises a supporting means for locating an object to be sharpened at the surfacing member.2. A portable sharpening apparatus according to claim 1 , wherein the supporting means comprises one or more lateral support members for guiding the object to be sharpened such that claim 1 , when in use claim 1 , an object to be sharpened is orientated with a face to be sharpened parallel to the axis of operation of the surfacing member.3. A portable sharpening apparatus according to claim 1 , wherein the surfacing member comprises a rotatable abrasive drum having an axis of rotation.4. A portable sharpening apparatus according to claim 3 , wherein the ...

GUARD DEVICE

A guard device includes at least one basic element, at least one fastening element, and at least one guard anti-twist device. The at least one guard anti-twist device includes at least one braking element that, in at least one operating state of a portable power tool, is configured at least to frictionally anti-twist lock the at least one basic element relative to a portable power tool. The at least one guard anti-twist device also includes at least one actuating unit configured to displace the at least one braking element. The at least one actuating unit includes at least one lever element. 1. A guard device comprising:at least one basic element;at least one fastening element; and at least one braking element configured, in at least one operating state of a portable power tool, at least to frictionally anti-twist lock the at least one basic element relative to the portable power tool; and', 'at least one actuating unit configured to displace the at least one braking element, the at least one actuating unit including at least one lever element., 'at least one guard anti-twist device, including2. The guard device according to claim 1 , wherein the at least one guard anti-twist device includes at least one bearing unit configured to support the at least one lever element in an at least partially pivotable manner.3. The guard device according to claim 1 , wherein the at least one lever element is configured to act claim 1 , at least in a radial direction claim 1 , on the at least one braking element.4. The guard device according to claim 1 , wherein the at least one lever element is configured to at least partially directly contact the at least one braking element.5. The guard device according to claim 2 , wherein the at least one bearing unit is connected at least partially fixedly to the at least one fastening element.6. The guard device according to claim 1 , wherein the at least one braking element includes at least one eccentric.7. The guard device according to ...

GUARD DEVICE

A guard device includes at least one basic element, at least one fastening element, and at least one guard anti-twist device. The at least one guard anti-twist device includes at least one braking element that, in at least one operating state of a portable power tool, is configured at least essentially at least to frictionally anti-twist lock the at least one basic element relative to the portable power tool. The at least one guard anti-twist device also includes at least one actuating unit configured to displace the at least one braking element. The at least one actuating unit includes at least one screwing element. 1. A guard device , comprising:at least one basic element;at least one fastening element; and at least one braking element that, in at least one operating state of a portable power tool, is configured at least essentially at least to frictionally anti-twist lock the at least one basic element relative to the portable power tool; and', 'at least one actuating unit configured to displace the at least one braking element, the at least one actuating unit including at least one screwing element., 'at least one guard anti-twist device, including2. The guard device according to claim 1 , wherein the at least one screwing element is configured to act claim 1 , at least partly in a radial direction claim 1 , on the at least one braking element.3. The guard device according to claim 1 , wherein the at least one screwing element is configured to at least partially directly contact the at least one braking element.4. The guard device according to claim 1 , wherein the at least one guard anti-twist device includes at least one receiving element configured to correspond with the at least one screwing element.5. The guard device according to claim 4 , wherein the at least one receiving element at least partially includes an internal thread.6. The guard device according to claim 4 , wherein the at least one receiving element is formed at least partially by a screw nut. ...

COMPACT ELECTRIC GRINDING MACHINE

The present invention particularly relates to a hand-held sanding machine with an outer housing (), a tool shaft () and a brushless electric drive motor. In the present invention, the rotor of the drive motor is fastened to the tool shaft () of the sanding machine, and the stator () is positioned in the outer housing (). The present invention also relates to a control method for an electric sanding machine. 118-. (canceled)19. A hand-held sanding machine comprising: an outer housing , a tool shaft and a brushless electric drive motor including a rotor , a stator is positioned in the outer housing whereinthe tool shaft has an eccentrically positioned tool holder said tool shaft being collinearly aligned with said rotor, andthe rotor of the drive motor without its own shaft is removably fastened to the tool and wherein said tool shaft extends within the drive motor as part of the rotor.20. A sanding machine according to claim 19 , wherein the axis of the rotor and the axis of the tool shaft are spaced apart parallel axes.21. A sanding machine according to claim 19 , wherein the grinding disc is mounted on the tool shaft eccentrically freely rotationally.22. A sanding machine according to claim 21 , wherein the grinding disc is with or without reduction gear mounted on the tool shaft in such a way that a rotating movement is generated.23. A sanding machine according to claim 19 , wherein the control unit of the motor is arranged in such a way that the speed of rotation is constant irrespective of the load.24. A hand-held sanding machine with an outer housing claim 19 , a tool shaft and a brushless electric drive motor claim 19 , a stator is positioned in the outer housing claim 19 , whereinthe tool shaft has a eccentrically positioned tool holder, andthe rotor of the drive motor without its own shaft is removably fastened to the tool shaft, which extends within the rotor of the drive motor;wherein the control unit of the motor is arranged in such a way that the speed ...

PROTECTIVE HOOD DEVICE

A protective hood device includes at least one basic body, at least one fastening unit, and at least one protective-hood-device anti-rotation unit. The at least one fastening device is configured, at least partially, to fasten the basic body relative to a hand power tool, in particular by force closure. The at least one protective-hood-device anti-rotation unit has at least one stop element, which is configured, at least partially, in at least one operating state of a hand power tool, to lock the basic body against rotation relative to the hand power tool, in particular by form closure. The at least one stop element is at least partially integral with the fastening unit. 1. A protective hood device , comprising:at least one basic body,at least one fastening unit configured, at least partially, to fasten the at least one basic body relative to a hand power tool, andat least one protective-hood-device anti-rotation unit including at least one stop element, the at least one stop element configured, at least partially, in at least one operating state of the hand power tool, to lock the at least one basic body against rotation relative to the hand power tool,wherein the at least one stop element is configured, at least partially, so as to be integral with the at least one fastening unit.2. The protective hood device according to claim 1 , wherein the at least one stop element is configured to bear at least partially against a transmission housing of the hand power tool when the at least one stop element is in the at least one operating state of the hand power tool.3. The protective hood device according to claim 1 , wherein the at least one stop element is at least partially constituted by a screw element.4. The protective hood device according to claim 1 , wherein the at least one stop element includes an internal thread claim 1 , at least partially.5. The protective hood device according to claim 1 , wherein the at least one stop element includes a domed nut claim 1 , ...

Tool unit

A tool unit includes at least one basic body and at least one information element. The at least one basic body includes at least one fastening region configured, at least partially, to couple to a tool receiver of at least one hand-held power tool. The at least one basic body also includes at least one working region configured, at least partially, to work at least one workpiece when in an operating state. The at least one information element includes, at least partially, a material relief in the basic body.

MACHINE-TOOL BRAKING DEVICE

A machine-tool braking device, particularly a hand-held machine-tool braking device, for a portable machine-tool includes at least one mechanical braking unit that has at least one braking element and at least one output unit that has at least one movably mounted output element. The braking element is formed by an encircling mechanism which at least partially encircles the output element in a state of operation. 1. A machine-tool braking device of a portable machine tool , comprising:at least a mechanical brake unit having at least a braking element; andat least an output unit having at least a movably mounted output element,wherein the braking element is formed by a wrap-around mechanism that at least partially wraps around the output element at least in an operating state.2. The machine-tool braking device as claimed in claim 1 , wherein the braking element has an angle of wrap which is greater than 180°.3. The machine-tool braking device as claimed in claim 1 , further comprising at least an operating unit configured to one or more of activate and deactivate the brake unit with at least a cam gear element claim 1 , the cam gear element being configured to act at least upon one end of the braking element so as to alter a distance between the braking element and the output element.4. The machine-tool braking device as claimed in claim 3 , wherein the cam gear element is mounted in a translationally movable manner.5. The machine-tool braking device as claimed in claim 1 , wherein the brake unit has at least a spring element configured to act upon the braking element with a spring force at least in an operating state.6. The machine-tool braking device as claimed in claim 1 , wherein the braking element is configured as a band.7. The machine-tool braking device as claimed in claim 1 , wherein the output element is configured as a bevel gear.8. The machine-tool braking device as claimed in claim 1 , wherein the brake unit has at least one brake lining arranged on the ...

MACHINE TOOL SWITCHING DEVICE

A machine tool switching device, in particular for portable machine tools, includes at least one switching unit that has at least one movably mounted operating element for actuating a mechanical, electrical, and/or electronic switching element. The machine tool switching device further includes at least one blocking device for blocking at least one movement of the operating element. The blocking device includes at least one movably mounted release element provided to lift the blockage of the operating element. The release element is mounted on the operating element so as to be movable in a translatory manner. 1. A machine tool switching device , comprising:at least one switching unit which has having at least one movably mounted control element for actuating configured to actuate one or more of a mechanical switching element, an electric switching element, and an electronic switching element; andat least one blocking device configured to block at least one movement of the control element, said blocking device having at least one movably mounted release element configured to lift the block of the control element,wherein the release element is mounted so as to be movable in a translatory manner.2. The machine tool switching device as claimed in claim 1 , wherein the release element is mounted on the control element so as to be movable in a translatory manner.3. The machine tool switching device as claimed in claim 1 , wherein the release element is arranged at least in part in a recess of the control element.4. The machine tool switching device as claimed in claim 1 , wherein the blocking device has at least one blocking element configured to block a movement of the control element in dependence on a position of the release element claim 1 , said blocking element being fixed on the release element.5. The machine tool switching device as claimed in claim 4 , wherein the blocking element is configured integrally with the release element.6. The machine tool switching ...

Counter-rotating polisher

A counter-rotating polisher includes: an enclosure, an electric motor, a polishing arrangement and a counter-rotating arrangement. The electric motor is fixed to the enclosure and includes a driving axle. The polishing arrangement includes two polishing device. The polishing devices respectively include a fixed tray and a polishing material that are fixedly connected to an outside of the fixed tray. The fixed tray is perpendicular to the driving axle. The counter-rotating arrangement includes a first driving wheel, a second driving wheel and a change-direction wheel. The first driving wheel is connected to the driving axle and driven by the driving axle. The second driving wheel is fixedly connected to the second fixed tray. The change-direction wheel is connected to the first driving wheel and the second driving wheel. The driving axle rotates the first polishing material positively. The change-direction wheel reversely transmits the rotation to the second driving wheel. 1. A counter-rotating polisher , comprising:an enclosure;an electric motor, fixed inside said enclosure, and comprising a driving axle;a polishing arrangement, driven by said electric motor, comprising a first polishing device, comprising a first fixed tray perpendicular to said driving axle and a first polishing material fixedly connected to an outer wall of said first fixed tray, and a second polishing device, comprising a second fixed tray perpendicular to said driving axle and a second polishing material fixedly connected to an outer wall of said second fixed tray, wherein a polishing surface of said first polishing material and a polishing surface of second polishing material are on a same plane and rotate coaxially and oppositely; anda counter-rotating arrangement, comprising a first driving wheel connected to said driving axle and driven by said driving axle, a second driving wheel fixedly connected to said second fixed tray, and a change-direction wheel connected to said first driving wheel ...

Grinding Tools With Guards

In at least one illustrative embodiment, a grinding tool may comprise a housing including a mount, a shaft extending from the mount along a drive axis, where the shaft is configured to support a grinding wheel for rotation about the drive axis, and a guard coupled to the mount. The guard may comprise a central ring extending around the mount, a shroud extending radially outward from the central ring along a first portion of a circumference of the central ring, and a standoff coupled to a second portion of the circumference of the central ring. The standoff may extend from the central ring along a direction substantially parallel to the drive axis such that the standoff limits rotation of the guard about a tipping axis that is substantially perpendicular to the drive axis. 110-. (canceled)11. A grinding tool comprising:a housing including a mount;a shaft extending from the mount along a drive axis, the shaft being configured to support a grinding wheel for rotation about the drive axis; anda guard coupled to the mount, the guard comprising a central ring extending around the mount, a shroud extending radially outward from the central ring along a first portion of a circumference of the central ring, and a standoff coupled to a second portion of the circumference of the central ring;wherein the standoff extends from the central ring along a direction substantially parallel to the drive axis such that the standoff limits rotation of the guard about a tipping axis that is substantially perpendicular to the drive axis.12. The grinding tool of claim 11 , further comprising a guard lock movable between an unlocked position that allows the guard to rotate about the drive axis and a locked position that blocks the guard from rotation about the drive axis.13. The grinding tool of claim 12 , wherein the guard lock comprises a first retaining feature coupled to the central ring.14. The grinding tool of claim 13 , wherein the guard lock further comprises a second retaining ...

DIRECT MOTOR-DRIVE PORTABLE ANGLE GRINDER

The present invention is an original direct motor-drive portable angle grinder with a disc type motor installed in a position adjacent to the grinding wheel and an outer motor rotating part coaxially and directly driving the grinding wheel. By means of the direct drive, the present invention prevents the emission of noise made by angle type transmission devices. Moreover, an inertial body is installed on the rotating housing that is integrated with the rotating part to form a flywheel or the rotating housing and the inertial body are integrated into a single reinforced structure to enable a flywheel function in order to improve the grinding, polishing and machining or cutting abilities of the grinding wheel. 1. A direct motor-driven angle grinder , comprising:a drive motor having an inner housing part, a rotating outer housing part that encloses the motor and surrounds the inner housing part, and a spindle connected to the rotating outer housing part;a handle fixed to an extending from the inner housing part, wherein an angle between an axis of the handle and an axis of the housing is between 30° and 150°; andone of a grinding wheel and a circular saw fixed to the spindle so as to rotate with the rotating outer housing and be directly driven by the drive motor,wherein the rotating outer housing part of the drive motor serves as a flywheel during operation of the motor to rotate the grinding wheel or circular saw.2. A direct motor-driven angle grinder as claimed in claim 1 , further comprising a guard installed on one side of grinding wheel or circular saw and the rotating outer housing part claim 1 , and adjacent to the handle.3. A direct motor-driven angle grinder as claimed in claim 1 , wherein the manually operated electro-mechanical control device is arranged to carry out one or more of the following control functions: turn the motor on and off and control a rotational speed of the motor.4. A direct motor-driven angle grinder as claimed in claim 1 , wherein a ...

Angle grinder, air blower, and power tool

A power tool includes a housing, a tool attachment, an output shaft, an electric motor, and an airflow channel. The housing includes an air inlet and an air outlet, and an airflow channel is formed between the air inlet and the air outlet. The electric motor includes an electric motor shaft, a stator and a rotor. The power tool further includes a thermal conduction member disposed between the rotor and the stator and configured to transfer heat between the rotor and the stator into the airflow channel. Further disclosed is an angle grinder. The power tool has good heat dissipation performance.

POLISHING PAD OF A HAND-HELD POWER TOOL AND POWER TOOL WITH SUCH A POLISHING PAD

The invention refers to a polishing pad () adapted for being detachably attached to a bottom surface (a) of a plate-like backing pad () of a hand-held power tool (). The backing pad () is actuated by an electric or pneumatic motor of the hand-held power tool (), in order to perform a purely rotating, a random orbital or a roto-orbital working movement. The polishing pad () comprises a bottom working surface (b) facing a workpiece to be polished during intended use of the power tool (). It is suggested that the bottom working surface (b) has at least two pieces () of polishing material with different characteristics. A bottom working surface (b) of at least one of the pieces () of the polishing pad () having a first characteristic extends beyond a bottom working surface (b) of at least another of the pieces () of the polishing pad () having a different second characteristic. (FIG. ) 11111991911111111111213131311121211aabbbb. Polishing pad () having a top surface () adapted for being detachably attached to a bottom surface () of a plate-like backing pad () of a hand-held power tool () , the backing pad () being actuated by an electric or pneumatic motor of the hand-held power tool () , in order to perform together with the polishing pad () attached thereto a purely rotating , a random orbital or a roto-orbital working movement , wherein the polishing pad () comprises a bottom working surface () facing a workpiece to be polished during intended use of the power tool () , characterized in that the bottom working surface () has at least two pieces ( , ) of polishing material with different characteristics , wherein a bottom working surface () of at least one of the pieces () of the polishing pad () having a first characteristic extends beyond a bottom working surface () of at least another of the pieces () of the polishing pad () having a different second characteristic.2111213. Polishing pad () according to claim 1 , wherein the different characteristics of the pieces ( ...

POWER SUPPLY STRUCTURE OF ELECTRIC GRINDING TOOL MACHINE

A power supply structure of an electric grinding tool machine comprises a power management module, a power connecting wire and a battery socket, wherein the power management module is arranged on a main body of the electric grinding tool machine, the power connecting wire is electrically connected with the power management module and extends outside the main body of the electric grinding tool machine, and the battery socket is connected with the power connecting wire and can be randomly changed in position on the basis of the power connecting wire, the battery socket being used for a replaceable battery which is selectively arranged on the battery socket, and the battery socket being provided with a guide chute formed corresponding to a boss on the replaceable battery in shape and at least two conductive terminals arranged in the guide chute. 1. A power supply structure of an electric grinding tool machine comprising:a power management module, arranged on a main body of the electric grinding tool machine;a power connecting wire, electrically connected with the power management module and extending outside the main body of the electric grinding tool machine; anda battery socket, connected with the power connecting wire and being able to be randomly changed in position on a basis of the power connecting wire, the battery socket being used for a replaceable battery which is selectively arranged on the battery socket, and the battery socket being provided with a guide chute formed corresponding to a boss on the replaceable battery in shape and at least two conductive terminals arranged in the guide chute.2. The power supply structure of an electric grinding tool machine of claim 1 , wherein the power management module comprises a first connecting seat arranged on an outer surface of the main body of the electric grinding tool machine claim 1 , and one end of the power connecting wire which is not connected with the battery socket comprises a first connector capable of ...

Abrading Disc

A rotating circular disc attaches to a rotary motion abrading tool and converts the rotary motion to a random orbital motion. The disc has a center and has an axis of rotation that is off center and that forms a center of gravity. One embodiment of the disc is a backing plate. A second embodiment of the disc is a polishing pad. A third embodiment of the disc is a combination of a backing plate and a polishing pad. 1. An abrading disc for attachment to a rotary motion abrading tool that converts the rotary motion to a random orbital motion , the disc having a center , an axis of rotation that is off center and that forms a center of gravity , and a means for attachment to a rotary motion abrading tool.2. The abrading disc of wherein the disc comprises a backing plate having a working face for attachment of a polishing pad and an opposed face with an arbor extending outwardly from the opposed face that defines the axis of rotation and that attaches to a rotary motion abrading tool.3. The abrading disc of wherein the backing plate has a crescent shaped recess in the opposed face.4. The abrading disc of wherein the disc comprises a polishing pad having a working face with an abrasive surface and an opposed face having a means for attachment to a backing plate.5. The abrading disc of wherein the means for attachment comprises a hook and loop fabric.6. A backing plate for a rotary motion abrading tool that converts the rotary motion to a random orbital motion claim 1 , the backing plate comprising a circular plate having a center claim 1 , a working face for attachment of a circular polishing pad claim 1 , an opposed face with an arbor extending outwardly from the opposed face that defines an axis of rotation claim 1 , the axis of rotation being off center and forming a center of gravity when a circular polishing pad is attached to the working face.7. The backing plate of wherein the opposed face has a crescent shaped recess.8. The backing plate of wherein the working ...

Pole Sander With Light Attachment

A pole sander with a light attachment is provided. The pole sander includes a shaft having a proximal end and a distal end. The proximal end includes a sander head that is rotatably driven by a motor disposed within said sanding head configured to sand a surface to achieve a smooth surface. Along the length of the shaft towards the proximal end, the shaft further includes a light attachment configured to provide light to the proximal end. The light attachment includes a substantially cone-shaped housing having a socket configured to receive a light source. The socket is electrically connected to a power source that provides the light source with an electrical current allowing the same to produce light. The housing is placed in contact with the shaft to direct the light attachment towards the sanding head to improve visibility. 1) A pole sander with a light attachment , comprising:a shaft having a proximal end and a distal end;said proximal end comprising a sander head configured to smooth a surface;wherein said sanding head is rotatably driven by a motor disposed within said sanding head;a light attachment removably secured to said shaft;wherein said light attachment includes a light source directed towards said proximal end of said shaft.2) The pole sander with a light attachment of claim 1 , wherein:said light attachment comprises a housing having a substantially cone-shape having an exterior surface, a coextensive interior surface, a wide open end, and a narrow open end forming an interior volume;wherein said housing is configured to be placed in contact with said shaft.3) The pole sander with a light attachment of claim 2 , wherein:said narrow end includes a socket configured to receive a light source to be situated within said interior volume;wherein said housing is configured to direct said light source towards said proximal end and said sanding head to provide lighting for the same.4) The pole sander with a light attachment of claim 3 , wherein said socket is ...

ADJUSTABLE GUARD FOR POWER TOOL

A power tool includes an output shaft defining a rotational axis and a housing from which the output shaft protrudes. The power tool further includes a flange at least partially surrounding the output shaft, a circumferential groove defined between the housing and the flange, and a radially inward-extending slot in the flange. The power tool also includes a rotatable guard having a first radially inward-extending projection and a plurality of apertures positioned radially about the rotational axis. The first radially inward-extending projection is receivable through the radially inward-extending slot in the flange and positioned within the groove. Furthermore, the power tool includes a lever having a detent member, and a biasing member for biasing the lever toward the rotatable guard. The detent member is receivable in one of the plurality of apertures to rotationally lock the rotatable guard relative to the housing.

Angle Grinder

The present invention relates to an angle grinder having a front transmission housing for enclosing a transmission arrangement which has a closing surface that faces away from a free end of the tool spindle, and wherein the maximum distance between the closing surface and an end face of the free end of a tool spindle defines a height of the transmission housing, and wherein the height has a predefined ratio to a diameter of a disc-shaped tool, of about 1 to about 5. 1. An angle grinder comprising: a motor for driving a tool spindle , and wherein the tool spindle is arranged , by means of an angle transmission arrangement , at an angle in relation to a driving shaft of the motor , and wherein the angle transmission arrangement is enclosed , at least in part , in an associated transmission housing , and from which extends a free end of the tool spindle , to which a disc-shaped tool , which can rotate about a central longitudinal axis of the tool spindle , can be fastened by means of a tool flange ,and wherein at least a front of the transmission housing of the angle transmission arrangement has a closing surface that faces away from the free end of the tool spindle, and wherein the maximum distance between the closing surface and an end face of the free end of the tool spindle defines a height of the transmission housing, and wherein the height has a predefined ratio to the diameter of the disc-shaped tool, of maximally 1 to 2, and preferably of 2 to 5.2. An angle grinder as claimed in claim 1 , and wherein the closing surface of the tool flange that faces in a direction towards the tool spans a notional plane that intersects the motor claim 1 , at least partially.3. An angle grinder according to claim 2 , and wherein a tangent that is defined as a line extending from a circumferential edge of the disc-shaped tool and which is further oriented against the transmission housing claim 2 , and encloses claim 2 , together with the notional plane claim 2 , an angle of a ...

DUST COLLECTOR FOR AN ANGLE GRINDER

A dust collector for an angle grinder, comprising a collector body for covering a circular grinding wheel, and a sealing element extending along an outer periphery (U) of the collector body for at least partially sealing the collector body against a surface to be machined by means of the grinding wheel, and comprising a suction connection, by way of which material removed from the surface can be suction out of the collector body. In an axial direction with respect to the axis of rotation (R) of the grinding wheel, the sealing element is spring-mounted in the collector body by means of at least one spring element. 110. A dust collector for an angle grinder , comprising a collector body () for covering a circular grinding wheel , and a sealing element extending along an outer periphery of the collector body for at least partially sealing the collector body against a surface to be machined by the circular grinding wheel , and comprising a suction connection , by way of which material removed from the surface can be suctioned out of the collector body , wherein ,in an axial direction with respect to an axis of rotation (R) of the grinding wheel, the sealing element is spring-mounted in the collector body by at least one spring element.2. The dust collector for an angle grinder as claimed in claim 1 ,wherein the collector body is designed to cover a predominant part of the grinding wheel and the dust collector has a collector segment displaceable along the collector body in a peripheral direction (U) of the collector body, the collector segment arranged for gradually covering and exposing of a part of the grinding wheel as needed, and wherein in the axial direction with respect to the axis of rotation (R) of the grinding wheel, the sealing element is also spring-mounted in the collector segment by the at least one spring element.3. The dust collector for an angle grinder as claimed in claim 1 ,wherein the spring element has a base web, via which the at least one spring ...

Sliding ring for a grinding device and method for producing the sliding ring

A sliding ring for a grinding device consisting of a grinding element and a hood covering the grinding element and a sliding ring attachable to the side of the hood facing a surface to be machined, the sliding ring having a sliding surface provided for sliding on the surface to be machined, the sliding ring consisting of at least one elastic component and a sliding component, the sliding surface being formed on the sliding component and the elastic component being arranged on the side of the sliding component opposite the sliding surface.

OUTPUT SHAFT ROTATION RESTRICTION STRUCTURE OF HAND-HELD MACHINE TOOL

A output shaft rotation restriction structure of a hand-held machine tool having a shell, a drive shaft in the shell, and an output shaft in the shell, perpendicular to the drive shaft, provided with a grinding piece, and in linkage with the drive shaft via a steering gear set; two sides of the hand-held machine tool may be defined according to an extension line of the drive shaft. The output shaft rotation restriction structure includes a mounting hole on the shell, specifically, one of the two sides of the hand-held machine tool, a restriction hole on the output shaft and facing the mounting hole, and a rotation restriction group including a holder in the mounting hole, a restriction plug on the holder, and a spring, the restriction plug being forced into the restriction hole to interfere with the rotation of the output shaft. 1. An output shaft rotation restriction structure of a hand-held machine tool , the hand-held machine tool comprising a shell , a drive assembly disposed in the shell , a drive shaft disposed in the shell and driven by the drive assembly , and an output shaft disposed in the shell and perpendicular to the drive shaft in an extension direction thereof , wherein the output shaft is provided with a grinding piece , connected to the drive shaft via a steering gear set , and driven by the drive shaft , and wherein two sides of the hand-held machine tool is defined on the basis of an extension line of the drive shaft; the output shaft rotation restriction structure comprising:a mounting hole provided on the shell and positioned on one of the two sides of the hand-held machine tool,a restriction hole provided on the output shaft and facing the mounting hole, anda rotation restriction group including a holder disposed in the mounting hole, a restriction plug disposed on the holder and exposed outside the shell, and a spring disposed in the holder and provides the restriction plug with a restoring force, wherein the restriction plug is inserted into ...

HANDHELD CUTOFF GRINDER

Handheld cutoff grinder including a cutting disk (), a motor housing having a drive unit and a cantilever () with a support arm () and an arm cover (). A stop element () is provided in the arm cover () for the spindle (), the stop element limiting the movement of the spindle () in a plane () perpendicular to the axis of rotation () during operation. 18-. (canceled)9: A handheld cutoff grinder comprising:a spindle;a cutting disk arranged on the spindle and rotatable about an axis of rotation;a motor housing with a drive unit, the spindle being connected to the drive unit via a transmission device; anda cantilever with an arm cover and a support arm having a first end and a second end, the support arm being fixed by the first end on the motor housing and the spindle being fixed via a bearing element to the second end,the arm cover being fastened on the support arm via fasteners;a stop being provided in the arm cover for the spindle, the stop limiting movement of the spindle in a plane perpendicular to the axis of rotation during operation.10: The cutoff grinder as recited in wherein the support arm has a first bearing seat and a second bearing seat at the second end claim 9 , a first bearing being arranged in the first bearing seat claim 9 , and a second bearing being arranged in the second bearing seat.11: The cutoff grinder as recited in wherein the arm cover is a metal material.12: The cutoff grinder as recited in wherein the metal material is a light metal material.13: The cutoff grinder as recited in wherein the stop is an insert claim 9 , the insert being arranged in a bearing seat formed in the arm cover.14: The cutoff grinder as recited in wherein the stop is a bearing arranged in a bearing seat formed in the arm cover.15: The cutoff grinder as recited in wherein the spindle is mounted in the support arm via the first and second bearings and is mounted in the arm cover via a further bearing.16: The cutoff grinder as recited in wherein the first bearing is ...

TRIMMING TOOL AND METHOD OF USE

An example trimming tool includes a floating base having a first side and an opposite, second side, a first rail, and a second rail. At least the second side of the floating base, the first rail and the second rail define a workspace having a first opening and a second opening. The trimming tool also includes a milling apparatus, attached to the floating base, having a base on the first side of the floating base and a milling head on the second side of the floating base. The milling head is spring loaded. The floating base and milling apparatus are configured to remove at least a portion of a foam layer in the workspace. 1. A trimming tool comprising:a floating base having a first side and an opposite, second side, a first rail, and a second rail wherein at least the second side of the floating base, the first rail and the second rail define a workspace having a first opening and a second opening; anda milling apparatus, attached to the floating base, having a milling head on the second side of the floating base, wherein the milling head is spring loaded, wherein the floating base and milling apparatus are configured to remove at least a portion of a foam layer in the workspace.2. The trimming tool of claim 1 , wherein the first rail and the second rail include linear portions to maintain the floating base against a surface.3. The trimming tool of claim 1 , wherein the first rail claim 1 , the second rail claim 1 , and the floating base are unitary.4. The trimming tool of claim 1 , wherein the floating base includes a collection port configured to allow millings to pass through a collection port opening and out of the workspace claim 1 , wherein the collection port is connected to a tube configured to provide suction.5. The trimming tool of claim 1 , wherein the milling apparatus includes a handle and a motor configured to power the milling head.6. The trimming tool of claim 1 , wherein the milling head includes a plurality of protrusions extending about a ...

GEAR HEAD AND HAND-HELD POWER TOOL

A gear head for a hand-held power tool for machining workpieces, in particular for an angle grinder. The gear head including a gear plate, a housing closable by the gear plate, in which a power take-off is accommodated, which is connectable to a drive of the hand-held power tool, the power take-off including a tool shaft protruding from the gear plate, which is at least partially surrounded by a safety guard fastenable to a gear flange of the housing. A securing lever locks the safety guard on the gear flange, the securing lever being adjustable around a pivot axis between a first position, in which the safety guard is rotatably fixedly connected to the gear flange and a second position, in which the safety guard is rotatable with respect to the gear flange against a force of a restoring element acting in a direction of the first position. 1. A gear head for a hand-held power tool for machining workpieces , the gear head comprising:a gear plate;a housing closable by the gear plate, in which a power take-off is accommodated, which is connectable to a drive of the hand-held power tool, the power take-off including a tool shaft protruding from the gear plate, which is at least partially surrounded by a safety guard fastenable to a gear flange of the housing;a securing lever locks the safety guard on the gear flange, which is supported on the gear plate, the securing lever being adjustable around a pivot axis between a first position, in which the safety guard is rotatably fixedly connected to the gear flange and a second position, in which the safety guard is rotatably with respect to the gear flange against a force of a restoring element acting in a direction of the first position; anda securing device that limits an adjustment of the securing lever beyond the first position, the securing device having a contact surface.2. The gear head according to claim 1 , wherein a gap claim 1 , whose width is between 0.5 mm and 1.0 mm claim 1 , is formed between the securing ...

Heavy-Duty Hand-Held Power Tool

A heavy-duty hand-held power tool appliance includes at least one electric motor configured to drive a working tool and an energy storage unit configured to supply electricity to the at least one electric motor.

FULLY ROTATABLE GRINDER GUARD ASSEMBLY AND METHOD FOR MAKING SAME

A fully rotatable guard assembly () for use with a tool having a rotating disc includes at least one rotatable bearing () for positioning on a shaft behind a rotating disc (). A shield () works with the rotatable bearing () for preventing sparks or other debris from being projected toward a user. A brake lever () is attached to the shield () for allowing the user to position the shield () at a predetermined position in relation to the rotating disc. The shield () is configured to cover approximately one-half () of the rotating disc () such that the position of the shield () can be easily rotated through use of the brake lever () for enabling the user to move the shield () such that the rotating disc () can access a workpiece. 1. A fully rotatable guard for use with a tool having a rotating disc comprising:at least one rotatable bearing for positioning on a shaft behind a rotating disc;a shield attached to the rotatable bearing for preventing sparks or other debris from being projected toward a user;a brake lever attached to the shield for allowing the user to position the shroud at a predetermined position in relation to the rotating disc; andwherein the shield covers at least one-half (½) of the rotating disc such that the position of the shield can be rotated through use of the brake lever enabling the user to move the shield such that the rotating disc can access a workpiece regardless of tool position.2. A fully rotatable guard as in claim 1 , further comprising a spacer positioned between the rotatable guard and tool for providing proper alignment of the tool to the rotatable guard.3. A fully rotatable guard as in claim 1 , wherein the shield is connected to a brake lever through the at least one bearing for returning the shield to a predetermined position.4. A fully rotatable guard as in claim 1 , wherein the shield returns to a predetermined position when no force is applied to the brake lever for preventing the rotating disc from controlling an undesirable ...

METHOD FOR FORMING ANCHOR HOLE AND DIAMETER EXPANSION DEVICE

To provide a method for forming an anchor hole and a diameter expansion device by which a centrifugal force can be appropriately adjusted when a cutting-blade portion is moved in a radial direction by the centrifugal force to grind a diameter expansion portion. In a method for forming an anchor hole for a post-installed anchor in which a diameter expansion drill bit is inserted and rotated in a prepared-hole portion bored in a concrete fixing body and a cutting-blade portion of the diameter expansion drill bit is moved in a radial direction by a centrifugal force to grind a part of the prepared-hole portion to form a diameter expansion portion, the minimum value of the centrifugal force applied to grind the diameter expansion portion is 0.75 N and preferably 1.1 N. 1. A method for forming an anchor hole for a post-installed anchor in which a diameter expansion drill bit inserted in a prepared-hole portion bored in a concrete fixing body is rotated and a cutting-blade portion of the diameter expansion drill bit is moved in a radial direction by a centrifugal force to grind a part of the prepared-hole portion to form a diameter expansion portion , whereina minimum value of the centrifugal force applied to grind the diameter expansion portion is 0.75 N.2. The method for forming the anchor hole according to claim 1 , whereinthe minimum value of the centrifugal force applied to grind the diameter expansion portion is 1.1 N.3. The method for forming the anchor hole according to claim 1 , whereinthe diameter expansion drill bit rotates at 2500 rpm or more and 40000 rpm or less.4. The method for forming the anchor hole according to claim 3 , whereinthe diameter expansion drill bit rotates at 9000 rpm or more and 20000 rpm or less.5. The method for forming the anchor hole according to claim 1 , whereinthe diameter expansion drill bit rotates and drives for five seconds or more and 20 seconds or less to form the diameter expansion portion.6. The method for forming the anchor ...

ELECTRIC POWER TOOL, AND METHOD FOR DETECTING KICKBACK OF ELECTRIC POWER TOOL FROM WORKPIECE

An electric power tool in one aspect of the present disclosure comprises a main body, a motor, a driver, a detector, and a kickback determiner. The kickback determiner determines that the main body is kicked back from a workpiece when an attitude change amount of the main body detected by the detector exceeds a preset kickback determination threshold during driving of the motor by the driver. 1. An electric power tool comprising:a main body configured to be mounted with a tool portion, the tool portion being configured to process a workpiece;a motor configured to generate a driving force for driving the tool portion mounted to the main body;a driver configured to drive the motor;a detector configured to detect an attitude change amount of the main body; anda kickback determiner configured to determine that the main body is kicked back from the workpiece when the attitude change amount detected by the detector exceeds a preset kickback determination threshold during driving of the motor by the driver.2. The electric power tool according to claim 1 ,wherein the detector is configured to detect, as the attitude change amount, a moving speed of the main body and/or a moving amount of the main body in at least one axis direction of the main body.3. The electric power tool according to claim 2 ,wherein the detector comprises an acceleration sensor configured to detect an acceleration of the main body in the at least one axis direction.4. The electric power tool according to claim 3 ,wherein the detector is configured to integrate the acceleration detected by the acceleration sensor, to thereby detect the moving speed and/or the moving amount.5. The electric power tool according to claim 3 ,wherein the detector is configured to remove a gravity acceleration component from the acceleration detected by the acceleration sensor.6. The electric power tool according to claim 1 ,wherein the detector is configured to detect, as the attitude change amount, a rotation speed of the ...

DUST COLLECTOR FOR ANGLE GRINDER

A dust collector for an angle grinder comprises a collector body for covering a circular grinding disk, a sealing element for sealing at least some sections of the collector body from a surface to be machined by the grinding disk, at least some sections of the sealing element being placeable in a first and a second retaining rail, and a suction terminal via which the abraded surface particles can be sucked off the collector body. The first retaining rail extends along a closed periphery of the collector body, and in the collector body, the sealing element is spring-mounted by at least one spring element in the axial direction relative to the axis of rotation of the grinding disk. 1. A dust collector for angle grinders , comprising a collector body for covering a circular grinding disk; a sealing element having sections; a first retaining rail and a second retaining rail , wherein at least some sections of the sealing element are placeable in the first retaining rail and the second retaining rail , and the first rail and the second rail are for sealing the at least some sections of the collector body from a surface to be machined by the grinding disk; having a suction terminal via which abraded surface particles can be sucked out of the collector body; and at least one open spring elementwherein the first retaining rail runs along a closed circumference (U) of the collector body, and the sealing element is spring-loaded in the collector body in an axial direction relative to an axis of rotation (R) of the grinding disk, by the at least one spring element.2. The dust collector for angle grinders according to claim 1 ,wherein the dust collector comprises a collector segment which can be displaced along the collector body in a circumferential direction (N) of the collector body, provided for gradually covering and uncovering a remaining portion of the grinding disk as required, wherein the closed circumference (U) of the collector body extends along a circular arc (A) ...

ELECTRICALLY POWERED TOOL

A rectifier circuit for rectifying an AC voltage supplied from a commercial power supply into a DC voltage, a smoothing capacitor for smoothing the output of the rectifier circuit, and an electrically powered tool for supplying the smoothed pulsating DC voltage to a motor by an inverter circuit, wherein when the motor is driven while no load is being applied to a tip tool, the smoothed DC voltage repeatedly generates a maximal value and a minimum value so as to synchronize with the fluctuation in the AC voltage. During no-load rotation, control is performed so that driving is performed at a value that is less than a threshold value Dfor the duty ratio at which the generation of a gear sound starts in any of the speed dial setting values -. It is thereby possible to suppress a gear sound generated by a power transmission mechanism during no-load rotation. 1. An electrically powered tool comprising:a rectifier circuit configured to rectify an AC voltage supplied from a commercial power supply to a pulsating DC voltage,a smoothing circuit having a smoothing capacitor configured to reduce a pulsation state of the pulsating DC voltage,a circuit configured to supply the smoothed DC voltage to a motor, anda power transmission mechanism configured to transmit a driving force of the motor to a tip tool,wherein a current continuously flows to the motor when the motor is driven in a state in which no load is applied to the tip tool, and in a state in which a load is applied to the tip tool, when the load applied to the tip tool is increased, the current flowing to the motor becomes intermittent.2. The electrically powered tool according to claim 1 , wherein the power transmission mechanism comprises a deceleration mechanism using a plurality of gears.3. The electrically powered tool according to claim 1 , wherein a switching element provided between the smoothing circuit and the motor and configured to control a voltage supplied to the motor claim 1 , and a controller ...

POWER TOOL

A power tool has a fan guide for straightening the flow of cooling air generated by a fan, wherein the branching passages through are provided for causing a portion of the cooling air drawn into the fan from a ventilation hole to diverge from a flow toward an exhaust port formed on a bearing guide side, and the portion of the cooling air flows toward an inlet and thereby circulates inside a housing. The branching passages through provided to the fan guide are formed so as to be inclined in the same direction as a circumferential direction so that air path resistance during actual operation (in an intermediate-speed region) does not increase. 1. A power tool , comprising: a motor; a fan , which is rotated by the motor; a housing , which accommodates the motor and the fan; and a fan guide , which straightens a cooling air generated by the fan , wherein ventilation ports introducing an external air and exhaust ports discharging an internal air are arranged on the housing , and an air path of the cooling air is formed from the ventilation ports to the exhaust ports by the rotation of the fan , the fan guide comprises ventilation holes for passing the air flowing into the fan and branching passages diverging a portion of the cooling air of the fan , and a portion of the cooling air returns to an air path before entering the fan guide owing to the branching passages.2. The power tool according to claim 1 , wherein a portion of the cooling air is guided by the fan guide claim 1 , and the housing and the fan guide are separate members.3. The power tool according to claim 2 , wherein the exhaust port side of the fan guide is covered by a cover component having exhaust holes claim 2 , and the fan guide further comprises through holes forming the branching passages.4. The power tool according to claim 3 , wherein a total opening area of the through holes is smaller than a total opening area of the exhaust holes.5. The power tool according to claim 4 , wherein a power ...

Slide Switch for a Power Tool

A power tool includes a slide switch which is configured to provide variable speed control of the rotational velocity of a drive member as well as provide ON/OFF functionality for the tool based on the position of the switch. The slide switch eliminates the need for a separate switch for turning the tool on and off. 1. A power tool comprising:a housing defining a longitudinal axis and having a nose portion;a variable speed motor enclosed within the housing and including an output member that extends from the nose portion of the housing parallel to the longitudinal axis, the variable speed motor being configured to receive a speed control signal and to drive the output member at different drive speeds depending on a parameter of the speed control signal;a speed signal generator configured to generate the speed control signal;a power circuit for connecting the speed signal generator to a power source; anda slide switch slidably supported on the housing and being operably connected to the power circuit, the slide switch being slidable between a first position and a second position in relation to the housing and being configured to output a variable selection signal having a value that depends on a location of the slide switch in relation to the first and the second positions,wherein the speed signal generator is coupled to receive the selection signal from the slide switch and to generate the speed control signal such that the parameter of the speed control signal depends on the value of the selection signal,wherein, when the slide switch is in the first position, the slide switch opens the power circuit and cuts off power to the motor, andwherein, when the slide switch is moved from the first position toward the second position, the power circuit is closed and power is supplied to the motor.2. The power tool of claim 1 , wherein the slide switch includes:a switch body including a plurality of conductors mounted thereon, the plurality of conductors defining a first ...

Bell Shaped Rotary Sander

An attachment for a sanding tool includes a first portion and a second portion. The first portion has a generally tubular shape that defines a mounting end portion for mounting the attachment on the sanding tool. The second portion defines a distal end portion of the attachment and a plurality of slits. The slits extend along an axial direction of the attachment to divide the second portion into flaps configured to axially flex and define a contoured sanding surface along the axial direction. 1. An attachment for a sanding tool , comprising:a first portion having a generally tubular shape with an axis of rotation and defining a mounting end portion of the attachment, an axial direction of the attachment being parallel to the axis of rotation; and a distal end portion of the attachment opposite the mounting end portion; and', each flap configured to flex such that at least a portion of the flap moves along the axial direction, and', 'the plurality of flaps, in a flexed position, defining a contoured sanding surface along the axial direction., 'a plurality of slits that extend along the axial direction to divide the second portion into a plurality of flaps,'}], 'a second portion extending from the first portion along the axial direction, and defining2. The attachment of claim 1 , wherein at least an outer surface of the second portion includes an abrasive material.3. The attachment of claim 1 , wherein the second portion is integral with the first portion.4. The attachment of claim 1 , wherein the second portion is a separate piece from the first portion claim 1 , and is configured to be removably mounted to the first portion so as to rotate with the first portion.5. The attachment of claim 1 , wherein the plurality of slits extend through the distal end portion of the second portion claim 1 , such that the distal end portion is formed by separate end portions of the plurality of flaps.6. The attachment of claim 5 , wherein claim 5 , in the flexed position of the ...

AIRFLOW INTAKE CONFIGURATION IN POWER TOOL

A power tool is provided including a housing including a motor case and a handle; an electric motor housed within the motor case and rotatably driving a motor spindle; a gear case mounted on the housing; and an output spindle rotatably coupled to the motor spindle. The output spindle, motor spindle, and the handle form the plane through the housing. A fan is coupled to the motor to generate an airflow through the housing. The housing includes a first air inlet on a first side of the plane and a second air inlet a second side of the plane opposite the first air inlet, both adjacent the motor. The first air inlet is larger than the second air inlet to allow a larger volume of air to enter the housing from the first side of the plane than from the second side of the plane. 1. A power tool comprising:a housing including a motor case and a handle extending from the motor case;an electric motor housed within the motor case and rotatably driving a motor spindle;a gear case mounted on the housing;an output spindle received at least partially within the gear case and rotatably coupled to the motor spindle, the output spindle being oriented perpendicularly to the motor spindle and together forming a plane through the housing;a fan rotatably fixed to the motor spindle to generate an airflow through the electric motor;a first air inlet formed in the housing adjacent the electric motor on a first side of the plane; anda second air inlet formed in the housing adjacent the electric motor on a second side of the plane opposite the first air inlet, wherein the first air inlet is larger than the second air inlet to allow a larger volume of air to enter the housing from the first side of the plane than from the second side of the plane.2. The power tool of claim 1 , wherein the output spindle rotates in a clockwise direction when viewed from a top of the gear case claim 1 , and the first air inlet is located on the left side of the housing when viewed from the top of the gear case in ...

ELECTRIC POWER TOOL

An electric power tool, for example, a polisher includes a tip end tool 67an output shaft extending in a direction perpendicular to a work surface, a main body housing extending in a direction perpendicular to the output shaft a motor housed in the main body housing and an electric circuit board disposed parallel to the motor in an direction in which the main body housing extends. 1. Aa electric power tool , comprising:a tip end tool;an output shft extending in a direction perpendicular in a work surface;a main body housing extenidng in a direction perpendicular to the output shaft;a motor that is housed in the main body housing; andan electrical circuit board that is disposed parallel to the motor in a direction in which the main body housing extends.2. An electric power tool comprising:a motor with a rotor shaft that extends in a front-to-rear direction;a motor housing that houses the motor;a gear housing that is disposed at the front side of dm motor;an output shaft that is held by the gear housing and disposed approximately perpendicular to the rotor shaft;a handle housing that is disposed at the rear side of the motor housing; andan electrical circuit board, that is disposed further outward than the outer periphery of the motor.3. An electric power tool , comprising:a motor with a rotor shaft that extends in the front-to-rear direction;a motor housing that houses the motor;a gear housing that is disposed at the front side of the motor;an output shaft that is held by the gear housing and disposed approximately perpendicular to the rotor shaft;a handle housing that is disposed at the rear side of the motor housing; andan electrical circuit board that is disposed between the motor and the handle housing,wherein the electrical circuit board is tilted in a front-to-rear direction or disposed in a perpendicular manner with respect to the front-to-rear direction.4. The electric power tool according to claim 2 , wherein there is a rib present extending in the up-to- ...

PAD FOR SUPPORTING ABRASIVE DISC

A pad for supporting an abrasive disc by being fixed with the abrasive disc to a shaft of a grinder, the pad including a supporting surface opposing the abrasive disc. In a radial direction, an outer edge of the supporting surface is located inward of an outer edge of the abrasive disc. The supporting surface includes a taper portion inclined away from the abrasive disc as it approaches the outer edge of the supporting surface. The abrasive disc is not fixed to the taper portion. 1. A pad for supporting an abrasive disc by being fixed with the abrasive disc to a shaft of a grinder , the pad comprising:a supporting surface opposing the abrasive disc,in a radial direction, an outer edge of the supporting surface being located inward of an outer edge of the abrasive disc,the supporting surface including a taper portion inclined away from the abrasive disc as it approaches the outer edge of the supporting surface, andthe abrasive disc being not fixed to the taper portion.2. The pad according to claim 1 , wherein a curve protruding toward the abrasive disc side is formed on the taper portion.3. The pad according to claim 1 , wherein the cross-section of the supporting surface along the radial direction has a V-shaped profile.4. The pad according to claim 1 , wherein a plurality of ribs is provided in areas other than the taper portion.5. The pad according to claim 1 , wherein the plurality of ribs is provided radially on a face on a side opposite the supporting surface. A first aspect of the present invention relates to a pad for supporting an abrasive disc.Various types of grinder are known in the prior art, one of which is the portable grinder. The grinder described in Patent Document 1 below includes a support plate and fiber grinding disc, the disc being adhered to the support plate.Patent Document 1: Specification of U.S. Published Application No. 2011/0045750However, with the grinders, such as the one described in Patent Document 1, the amount of abrasion with a ...

HAND-HELD TOOL

A hand-held tool, such as a disc grinder, is used to perform work at a high work site, a countermeasure is taken to prevent the hand-held tool from falling by using a suspension tool, such as a tether strap. If a coupling part that couples the suspension tool to the hand-held tool is damaged, this fact is notified to a user. Thereby, an original function of the suspension tool can be reliably performed. If a large impact is applied to a coupling member via a suspension tool, the coupling member is displaced to a second position, due to the deformation of a first position retaining member. A conductive portion disengages from contacts to cause a power circuit to be shut off, thereby prohibiting a main body part from being activated. 1. A hand-held tool that is held by a user with his or her hand to operate , comprising ,a coupling part that couples a suspension tool, wherein:the coupling part includes a coupling member that is displaceably supported relative to a housing of the hand-held tool between a first position and a second position, and a first position retaining member that holds the coupling member at the first position; andthe coupling member is displaced to the second position due to deformation of the first position retaining member, thereby prohibiting a main body of the hand-held tool from being activated.2. The hand-held tool according to claim 1 , wherein a shut off of a power circuit causes the main body of the hand-held tool to be prohibited from activation.3. The hand-held tool according to claim 2 , wherein:the power circuit includes a circuit conductive part comprising a conductive portion and a contact;the coupling member includes the conductive portion;the coupling member is supported by a frame member that includes the contact;the circuit conductive part is in an electrically conductive state when the conductive portion and the contact are in contact;the circuit conductive part is in an electrically nonconductive state when the conductive ...

PROTECTIVE DEVICE OF POWER TOOL

A protective device of a power tool includes a fixing base having a tube portion and an abutting surface, a restricting ring fitting around the tube portion, several springs disposed between the abutting surface and a first end of the restricting ring, a protective cover having several second projections and several second recesses, and a locking member. The first end has an abutting portion. A second end of the restricting ring has several first projections and several first recesses matching with the second projections and the second recesses. The restricting ring is located between the protective cover and the abutting surface. When a blocking portion of the locking member moves to a first position, the blocking portion restricts the restricting ring from moving toward the abutting surface. When the blocking portion moves to a second position, the blocking portion leaves a position between the abutting surface and the abutting portion. 1. A protective device of a power tool , comprising:a fixing base adapted to be engaged with the power tool and having a tube portion and an abutting surface, wherein the tube portion is adapted to be passed through by an output shaft of the power tool; the abutting surface is located on an outer periphery of the tube portion;a restricting ring which fits around the tube portion and is movable in an axial direction of the tube portion, wherein the restricting ring has a first end and a second end which face opposite directions; the first end faces the abutting surface of the fixing base and has an abutting portion; the second end has a plurality of first projections which are arranged in an annular shape and are arranged at intervals and a plurality of first recesses which are arranged in an annular shape and are arranged at intervals; the first projections and the first recesses are arranged alternately;a plurality of springs disposed between the abutting surface of the fixing base and the first end;a protective cover rotatably ...

Pneumatic power tool with an over-speed safety device

A pneumatic power tool includes: a housing with a pressure air inlet passage, a rotation motor, a working implement carrying output shaft, and an over-speed safety device including: a valve element located in the inlet passage and shiftable between open and closed positions, a motor speed responsive actuating mechanism which can shift the valve element from an open to a closed position as motor speed reaches an accepted maximum limit, and a retaining unit which maintains the valve element in an open position at normal motor speed levels and releases it toward the closed position when actuated by the actuating mechanism. The retaining unit includes: a latch spindle having varying width in an axial direction and coupled to the actuating mechanism for displacement between valve element locking and releasing positions at the maximum speed limit, and a support surface and axially adjacently located one or more waist portions.

POWER TOOL

A power tool includes a housing. A motor is housed in the housing. A platen is driven by the motor. The housing includes a first housing part, a second housing part and a third housing part. The housing defines a battery receptacle portion configured to receive a removable battery pack which powers the motor. Each of the first housing part, the second housing part and the third housing part form part of the battery receptacle portion. 1. A power tool comprising:a housing;a motor housed in the housing;a platen which is driven by the motor;wherein the housing comprises a first housing part, a second housing part and a third housing part;wherein the housing defines a battery receptacle portion configured to receive a removable battery pack which powers the motor; andwherein each of the first housing part, the second housing part and the third housing part form part of the battery receptacle portion.2. The power tool of claim 1 , wherein the battery receptacle portion comprises a first rail and a second rail claim 1 , the first and second rails configured to engage rails of the removable battery pack.3. The power tool of claim 2 , wherein the first claim 2 , second and third housing parts each form part of at least one of the first rail and the second rail.4. The power tool of claim 3 , wherein the first housing part and the second housing part together form the first rail.5. The power tool of claim 4 , wherein the third housing part forms the second rail.6. The power tool of claim 1 , wherein the first housing part is a first side housing part claim 1 , wherein the second housing part is a second side housing part and wherein the third housing part is a top housing part; andwherein the first side housing part and the second side housing parts form sides of the housing when the platen is disposed on a flat horizontal surface and the top housing part forms a top part of the housing when the platen is disposed on a flat horizontal surface.7. The power tool of claim 1 , ...

METHOD FOR PRODUCING SUBSTRATE

There is furnished a working tool comprising a rotating shaft (), a polishing plate () mounted on the shaft, an expandable elastomer sheet () attached to the polishing plate (), an abrasive cloth () attached to the elastomer sheet (), and means for pressing the elastomer sheet () at a plurality of positions under respective predetermined different pressures such that a lower surface of the abrasive cloth () is deformed to the desired inverted convex shape in accordance with differences of pressing force applied to the elastomer sheet () at the plurality of positions. A substrate is produced by bringing the inverted convexly deformed surface of the abrasive cloth () in contact with a substrate stock, and rotating and moving the working tool for polishing the substrate over a selected area. 1. A method for producing a substrate , comprising the steps of:furnishing a working tool comprising a rotatably mounted polishing plate, an expandable elastomer sheet attached to a lower surface of the polishing plate, an abrasive cloth attached to a lower surface of the elastomer sheet, and means for pressing the elastomer sheet at a plurality of positions under respective predetermined different pressures such that a lower surface of the abrasive cloth is deformed to the desired inverted convex shape in accordance with differences of pressing force applied to the elastomer sheet at the plurality of positions,bringing the inverted convexly deformed surface of the abrasive cloth in contact with a substrate, androtating and moving the working tool for polishing the substrate over a selected area.2. The method of wherein the pressing means includes a plurality of bores perforated in the polishing plate and arranged symmetrical about its center claim 1 , a plurality of cylinders inserted in the bores claim 1 , and a plurality of pistons slidably fitted in the cylinders claim 1 , wherein as the pistons are selectively descended claim 1 , the elastomer sheet is forced downward at sites ...

ANGLE GRINDER

An angle grinder includes a housing formed with a handle, a clamping device for mounting a grinding disk, an output shaft for driving the clamping device to rotate, a brushless motor being provided with a motor shaft, a transmission mechanism for transmitting power between the motor shaft and the output shaft, and a circuit board assembly for providing electricity to the brushless motor. The clamping device is disposed outside of the housing and connected with the output shaft. The output shaft is at least partially disposed inside of the housing and connected with the transmission mechanism. The brushless motor is arranged between the transmission mechanism and the circuit board assembly in a direction substantially parallel to the motor shaft, and the motor shaft is disposed along a direction substantially perpendicular to the output shaft. 1. An angle grinder , comprising:a housing formed with a handle;a clamping device for mounting a grinding disk;an output shaft for driving the clamping device to rotate;a brushless motor provided with a motor shaft;a transmission mechanism for transmitting power between the motor shaft and the output shaft; anda circuit board assembly for providing electricity to the brushless motor,wherein the clamping device is disposed outside of the housing and connected with the output shaft, the output shaft is at least partially disposed inside of the housing and connected with the transmission mechanism, the brushless motor is arranged between the transmission mechanism and the circuit board assembly in a direction substantially parallel to the motor shaft, and the motor shaft is disposed along a direction substantially perpendicular to the output shaft.2. The angle grinder of claim 1 , further comprising an enclosing capsule for fixing the circuit board assembly in the housing and wherein the circuit board assembly comprises a circuit element for controlling the brushless motor and a circuit board for mounting the circuit element claim ...

ELECTRIC TOOL

A grinder includes a spindle on which a grindstone wheel is mounted, and a wheel guard covering the grindstone wheel, the grinder including: an attachment portion having a housing portion and provided to a main body rotatably holding the spindle to surround the spindle; a fitting portion being provided to the wheel guard and fitting into the attachment portion; locking pieces disposed to the fitting portion at a different position in a circumferential direction of the spindle; cut-out portions disposed to the attachment portion at a different position in the circumferential direction and allowing the locking pieces to enter the housing portion; and an inner circumferential edge disposed to the attachment portion at a different position from the positions of the cut-out portions in the circumferential direction and being pressed against the locking pieces housed in the housing portion. 1. An electric tool comprising:a spindle on which a rotating tool is mounted;a wheel guard covering the rotating tool mounted on the spindle;an attachment portion including a housing portion and provided to a main body rotatably holding the spindle so as to surround the spindle;a fitting portion provided to the wheel guard and being fitted into the attachment portion;a plurality of locking pieces disposed to the fitting portion at a different position in a circumferential direction of the spindle;a plurality of cut-out portions disposed to the attachment portion at a different position in the circumferential direction and allowing at least one of the plurality of locking pieces to enter the housing portion; anda support portion disposed to the attachment portion at a different position from the positions of the plurality of cut-out portions in the circumferential direction and being pressed against the plurality of locking pieces housed in the housing portion.2. The electric tool according to claim 1 ,wherein the attachment portion includes a housing attached to the main body, and a ...

ELECTRIC GRINDING MACHINE

An electric grinding machine includes a spindle to be driven with a motor; a grinding disc attached to the spindle; a cover covering the grinding disc; a window disposed on the cover to expose an outer circumference of the grinding disc; a hinge mechanism joining the window to the cover so that the window freely moves between an opened position and a closed position, said hinge mechanism having a rotational axis disposed on the cover; a gate protruding from the window and having a cylindrical portion concentrical to the rotational axes; a hallowed portion formed in the gate, said hallowed portion forming a passage opening between the cover and the cylindrical portion when the window is closed; a slider disposed on the cover, said slider configured to pass through the passage opening to hold the window in the closed position; and a piston spring urging the slider toward the window. 1. An electric grinding machine comprising:a spindle to be driven with a motor;a grinding disc attached to the spindle;a cover covering the grinding disc;a window disposed on the cover to expose an outer circumference of the grinding disc;a hinge mechanism joining the window to the cover so that the window freely moves between an opened position and a closed position, said hinge mechanism having a rotational axis disposed on the cover;a gate protruding from the window and having a cylindrical portion, said cylindrical portion being concentrical to the rotational axes;a hallowed portion formed in the gate, said hallowed portion forming a passage opening between the cover and the cylindrical portion when the window is in the closed position;a slider disposed on the cover, said slider being configured to pass through the passage opening to hold the window in the closed position; anda piston spring urging the slider toward the window.2. The electric grinding machine according to claim 1 , further comprising a torsion spring disposed around the rotational axes of the hinge mechanism so that the ...

METHOD AND APPARATUS FOR APPLYING A UNIFORM TEXTURE TO A SUBSTANTIALLY VERTICAL SURFACE

A surfacing apparatus supported adjacent a substantially vertical surface of a structure for applying an even and uniform texture to the surface of the structure using a selectively adjustable force exerted on a texturing means to engage the surface of the structure. The surfacing apparatus is suited for horizontal and vertical movement in controlled prescribed paths under controlled and prescribed pressure from the adjustable tensioning means. 1. A system comprising:a support carriage, the support carriage including;a texturing head, the texturing head including at least one finishing pad, the at least one finishing pad configured to be movable across a work surface;a motor configured to move the at least one finishing pad across the work surface; anda tensioning device configured to provide a substantially constant pressure of the at least one finishing pad against the work surface, wherein the work surface is a surface of a wall.2. The system of claim 1 , wherein the support carriage includes a track assembly claim 1 , the track assembly configured to allow movement of the support carriage from one location of the work surface to another location of the work surface.3. The system of claim 2 , further comprising a lift mechanism configured to raise and lower the texturing head in relation to the work surface.4. The system of claim 3 , wherein the lift mechanism comprises a first end configured to contact a floor or ground surface and a second end connected to the carriage claim 3 , and the track assembly is connected to the second end of the lift mechanism claim 3 , the track assembly including at least one track configured for placement substantially planar to the work surface.5. The system of claim 1 , wherein the motor is pivotally attached to the texturing head.6. The system of claim 1 , wherein the support carriage includes a frame and a slide mounted to the frame substantially perpendicular to the work surface and configured to be movable with respect to the ...

METHOD AND APPARATUS FOR APPLYING A UNIFORM TEXTURE TO A SUBSTANTIALLY VERTICAL SURFACE

A surfacing apparatus supported adjacent a substantially vertical surface of a structure for applying an even and uniform texture to the surface of the structure using a selectively adjustable force exerted on a texturing means to engage the surface of the structure. The surfacing apparatus is suited for horizontal and vertical movement in controlled prescribed paths under controlled and prescribed pressure from the adjustable tensioning means. The surfacing apparatus can include a texturing head that can be configured to conform to the contour of a curved work surface to apply an even and uniform texture thereon. 1. A texturing head for a surfacing apparatus comprising:at least one texturing bit, the at least one texturing bit including a finishing pad configured to be movable across a work surface;a base plate; anda pivot device coupling the at least one texturing bit to the base plate, the pivot device configured to allow the texturing bit to conform to the contour of the work surface.2. The texturing head for a surfacing apparatus of claim 1 , wherein at least one finishing pad is configured to be movable across a work surface.3. The texturing head for a surfacing apparatus of claim 2 , including a motor configured to move the at least one finishing pad across the work surface.4. The texturing head for a surfacing apparatus of claim 2 , wherein the texturing bit includes:a bit plate; one or more pivot members; a pivot block; and a pivot shaft; andwherein the one or more pivot members are attached to the at least one bit plate and the pivot block is attached to a base plate.5. The texturing head for a surfacing apparatus of claim 4 , wherein the texturing bit further comprises at least one spring positioned between the pivot members and the bit plate.6. The texturing head for a surfacing apparatus of claim 1 , wherein the texturing bit includes:a bit plate; a ball post; and a socket; andwherein the socket is attached to the bit plate and the ball post is mated ...

GRINDER, COVER, AND LOCK NUT

A grinder includes a motor, a housing, a spindle and a cover. The spindle protrudes downward from the housing, is driven by the motor, and thereby rotates. The cover is provided on the spindle in the circumferential direction and at least partially covers a tool accessory, which is mounted on the spindle. The cover is configured such that at least one part deforms and/or is composed of an elastic material. 1. A grinder , comprising:a motor;a housing that houses the motor;a spindle that protrudes downward from the housing, is driven by the motor, and thereby rotates; anda cover that is provided on the spindle in the circumferential direction and at least partially covers the tool accessory, which is mounted on the spindle, from above;wherein the cover is configured such that at least one part thereof deforms in a direction away from the tool accessory.2. The grinder according to claim 1 , wherein:the at least one part of the cover is composed of an elastic material; andthe cover is configured such that, owing to the deformation of the elastic material, the at least one part of the cover deforms in the direction away from the tool accessory.3. The grinder according to claim 1 , wherein:the cover comprises at least a first cover part and a second cover part that at least partially cover the tool accessory from above;the first cover part is foldably connected to the second cover part at a location that is farther spaced apart from the spindle in a radial direction than is the second cover part; andthe cover is configured such that it deforms, by the folding, in the direction away from the tool accessory.4. The grinder according to claim 3 , wherein the first cover part is connected to the second cover part via a hinge.5. The grinder according to claim 1 , wherein the at least one part comprises a particular angular area along the circumferential direction.6. The grinder according to claim 1 , wherein the cover is configured such that the at least one part is resiliently ...

Grinder

A grinder includes a motor, a housing that houses the motor, a spindle that projects from the housing and is driven by the motor, and thereby rotates relative to the housing, and a wheel cover that is disposed on an outer-circumference side of the spindle and is configured to cover a portion of a tool accessory attached to the spindle. The grinder also includes a holding device for holding the wheel cover on the housing such that the arrangement and position of the wheel cover around the spindle can be changed but such that the wheel cover is not readily removable from the housing.

GRINDER, COVER AND COVER SET

A grinder () includes a motor (), a housing (), a spindle (), a first cover (), and a second cover (). The spindle protrudes downward from the housing, is driven by the motor, and thereby rotates. The first cover is provided in the circumferential direction of the spindle, is fixed to the housing, and at least partially covers a tool accessory (), which is mounted on the spindle, from above. The second cover is detachably mounted on the housing () independently of the first cover. 1. A grinder , comprising:a motor;a housing that houses the motor;a spindle that protrudes downward from the housing, is driven by the motor, and thereby rotates;a first cover that is provided in a circumferential direction of the spindle, is fixed to the housing, and at least partially covers a tool accessory, which is mounted on the spindle, from above; anda second cover that is detachably mounted on the first cover.2. The grinder according to claim 1 , wherein the second cover is detachably mounted on the first cover and at least partially covers an area of the tool accessory not covered by the first cover.3. The grinder according to claim 2 , wherein the second cover at least partially covers claim 2 , when the second cover is mounted on the first cover claim 2 , an area below the tool accessory not covered by the first cover.4. The grinder according to claim 1 , wherein the second cover is at least partly composed of an elastic material and is mounted on and dismounted from the first cover attendant by elastically deforming.5. The grinder according to claim 1 , wherein:the second cover is mountable on the first cover in a first orientation and in a second orientation; andan area of the tool accessory covered by the first and second covers is different when the second cover is mounted in the first orientation than when the second cover is mounted in the second orientation.6. The grinder according to claim 5 , wherein:when the second cover is mounted on the first cover in the first ...

GRINDER AND COVER

A grinder includes a motor, a housing, a spindle and a cover. The spindle protrudes downward from the housing, is driven by the motor, and thereby rotates. The cover at least partially covers a tool accessory mounted on the spindle. The cover includes a first cover part and a second cover part. The first cover part is fixed to the housing and at least partially covers the tool accessory from above. The second cover part is held such that it is capable of moving relative to the first cover part. The grinder is configured such that the area of the tool accessory covered by the cover changes in accordance with the relative movement. 1. A cover configured to at least partially cover a tool accessory mounted on a spindle of a grinder , the spindle protruding downward from a housing , the cover comprising:a first cover part that is provided in a circumferential direction of the spindle, is fixed to the housing, and is configured to at least partially cover the tool accessory from above; anda second cover part that is held by the first cover part such that the second cover part is movable relative to the first cover part;wherein an area of the tool accessory covered by the cover changes in accordance with movement of the second cover part relative to the first cover part.2. A grinder comprising:a motor;a housing that houses the motor;a spindle that protrudes downward from the housing, is driven by the motor, and thereby rotates; and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a cover according to .'}3. The cover according to claim 1 , wherein the second cover part is movable relative to the first cover part along a circumferential direction of the spindle.4. The cover according to claim 3 , wherein:the first cover part is configured such that, in a specific angular area in the circumferential direction, the tool accessory is partially covered from below; andthe second cover part is movable relative to the first cover part along the circumferential direction from the ...

Electric tool

An electric tool, such as an angle driver, has a main tool body with a front portion and a rear portion positioned opposite to the front portion. The main tool body houses a motor configured to receive electricity to function as a drive source. A gear head is coupled with the front portion of the main tool body wherein the gear head has a spindle in communication with a motor axis of the motor via mesh-engagement of bevel gears associated with the motor axis. The spindle has with a cutter tool accessory attached thereto such that rotation of the motor axis produces a commensurate rotation of the cutter tool accessory. Battery attachment portions are associated with the rear portion of the main tool body and are configured to receive a corresponding set of batteries that provide electricity to power the motor.

LATCHING MECHANISM USING DEPLOYABLE ARMS

A latching mechanism for a tool spindle or mandrel that latches by pivotally extending a plurality of tensioned arms from a tensioned seated state to a tensioned locked state through rotation of a lock ring pivotally deploying the arms from their nested seated state into a blade engaging position of a larger radius than the radius of the lock ring with the arms in their nested position. 1. A latching mechanism for mounting tools onto a spindle or mandrel , comprising:a substantially cylindrical housing having a flange as a housing base with said housing having fastener mounting means for attaching said housing to a spindle;a tool lock having bore mounting means for attaching said tool lock onto said housing with said tool lock having a plurality of deployable tensioned pivotal arms provided as latching means for holding a tool attachment between said flange and said deployable tensioned pivotal arms of said tool lock; anda pivotal arm tensioning member holding said deployable tensioned pivotal arms in a tool lock subjacent position and returning said deployable tensioned pivotal arms from a deployed position to said subjacent position.2. The latching system for mounting tools onto a spindle or mandrel according to claim 1 , wherein said fastener mounting means is a threaded bore.3. The latching system for mounting tools onto a spindle or mandrel according to claim 1 , further comprising a housing exterior surface extending in length from said flange to a predetermined point claim 1 , then diametrically decreasing for a predetermined length to a distal end of said flange of said housing.4. The latching system for mounting tools onto a spindle or mandrel according to claim 3 , wherein said housing exterior surface includes a plurality of helical channels extending longitudinally substantially between a distal end of said housing to said flange of said housing for serving as guide path for said tool lock rotatively moving between a locked position and an unlocked ...

Machine Tool Braking Device

A machine tool braking device, particularly a hand-held machine tool braking device, includes at least one braking unit and at least one control unit. The control unit includes a moveably-mounted control element that is configured to activate and/or deactivate the braking unit. The control element has a movement axis and is mounted such that the control element can pivot about the movement axis. 1. A power tool braking device , comprising:at least one braking unit; andat least one operating unit having a movably mounted operating element configured to one or more of activate and deactivate the braking unit, the operating element having a movement axis and being mounted such that the operating element is configured to pivot about the movement axis.2. The power tool braking device as claimed in claim 1 , wherein the braking unit includes a rotatably mounted braking element claim 1 , and wherein the movement axis of the operating element extends at least substantially transversely in relation to a rotation axis of the rotatably mounted braking element.3. The power tool braking device as claimed in claim 1 , wherein the braking unit includes a rotatably mounted braking element claim 1 , and wherein the movement axis of the operating element extends at least substantially parallelwise in relation to a rotation axis of the rotatably mounted braking element.4. The power tool braking device as claimed in claim 1 , wherein the braking unit includes a counter-braking element claim 1 , and wherein the operating unit has at least one movement coupling element that is configured to couple the operating element to the counter-braking element.5. The power tool braking device as claimed in claim 1 , wherein the braking unit includes a counter-braking element claim 1 , and wherein the operating unit has at least one movement coupling element formed as a cable pull element that is configured to couple the operating element to the counter-braking element.6. The power tool braking ...

FAST DETACHABLE POLISHING PLATE MECHANISM

The present invention provides a fast detachable polishing plate mechanism. The fast detachable polishing plate mechanism includes a polishing plate and a rod. The polishing plate has an adhesion unit disposed on the lower surface of the polishing plate. The rod connects straightly to the upper surface of the polishing plate. The rod is divided into an upper section, a middle section and a lower section from top to bottom, and only the middle section has a thread. The present invention further provides a hand-held machine tool having a drive shaft. The drive shaft has a tapped hole. The fast detachable polishing plate mechanism is mounted to the hand-held machine tool through the rod being inserted to the tapped hole. 1. A fast detachable polishing plate mechanism , comprising:a polishing plate having an adhesion unit disposed on a lower surface thereof; anda rod connected straightly to an upper surface of the polishing plate, wherein the rod is divided into an upper section, a middle section and a lower section from top to bottom, and only the middle section has a thread.2. The fast detachable polishing plate mechanism of claim 1 , further comprising a grinding unit fixed to the lower surface of the polishing plate through the adhesion unit.3. The fast detachable polishing plate mechanism of claim 2 , wherein the grinding unit includes a sponge or a sandpaper.4. The fast detachable polishing plate mechanism of claim 1 , wherein the adhesion unit includes a touch fastener.5. The fast detachable polishing plate mechanism of claim 1 , wherein the end face of the upper section of the rod is cylindrical claim 1 , spherical claim 1 , chamfered or tapered.6. A hand-held machine tool claim 1 , including:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the fast detachable polishing plate mechanism of any one of ; and'}a drive shaft having a tapped hole used for jointing to the rod of the fast detachable polishing plate mechanism. The present application claims the ...

Hand-Held Power Tool

A hand-held power tool, in particular an angle grinder, includes a tool receiver, a tool housing, and a drive motor arranged in the tool housing. The drive motor is configured to be switched on and off via an electric On/Off switch for driving the tool receiver. The hand-held power tool also includes an actuating device configured to actuate the On/Off switch. The actuating device has a pivotably mounted actuating element and a pivotably mounted pawl that is configured to be coupled to the actuating element. The pawl is further configured, in a free-running state, to move pivotably relative to the actuating element and, in an actuation state, to exert upon the actuating element an actuating force that actuates the actuating device.

ELECTRIC GRINDER WITH SWITCHED RELUCTANCE MOTOR

An electric grinder with a switched reluctance motor comprises a body, a transmission assembly, a grinding wheel, and a dust-proof assembly. The body includes a first casing and a second casing. The transmission assembly includes a switched reluctance motor disposed in the first casing, a driving module disposed in the second casing, a transmission shaft connected with the switched reluctance motor, and an assemblage seat disposed in the transmission shaft. The assemblage seat includes an assemblage member for assembling the grinding wheel. The dust-proof assembly includes a dust-proof hood disposed in the first casing. Because of being driven by the switched reluctance motor, the electric grinder of the present invention adapts to the cases of phase failure, frequent start-stop operations, and phase inversion. 1. An electric grinder with a switched reluctance motor , comprisinga body, including a first casing and a second casing, wherein the first casing includes a chamber thereinside, and wherein the second casing is disposed corresponding to the first casing and includes an accommodation room interconnecting with the chamber;a transmission assembly, including a switched reluctance motor disposed inside the chamber; a driving module disposed inside the accommodation room and electrically connected with the switched reluctance motor to output a control signal to the switched reluctance motor; a transmission shaft connected with the switched reluctance motor; and an assemblage seat disposed at one end of the transmission shaft, which is far away from the switched reluctance motor, wherein the assemblage seat includes an assemblage member joined with the transmission shaft and an airflow guiding member having a level drop with respect to the assemblage member, deviated from the axis of the transmission shaft, rotating together with the transmission shaft to generate a heat-dissipation airflow; anda grinding wheel and a dust-proof assembly, wherein the grinding wheel ...

ELECTRICAL SANDER

An electrical sander structure has a main body, a control mechanism and a control circuit. The main body has a brushless motor, and an electromagnetic coil in the brushless motor has a slotted concentrated winding brushless DC motor design. The control circuit is further includes a power detecting module, a rated power constraint module, an intelligent temperature control protection module and a rotation control module. The brushless motor is able to adjust the speed according to the load variations and intelligent temperature control protection mechanism, maintain the optimal operating efficiency and continuously operate within the power set by the rated power limit. In turn, the brushless motor can operate at optimum operating efficiency, helping to extend the life of the brushless motor, increasing user productivity and reducing energy losses. 1. An electrical sander comprising: a main body , a control mechanism and a control circuit; the main body having a housing , a transmission set , a motor transmission shaft , a mounting base , a motor transmission shaft and a mounting base , which can be locked or bonded or integrally formed or fused to make it firm , a cooling member and a grinding disc; the housing having a first chamber and a second chamber , the first chamber provided with an opening and containing the transmission set , the motor transmission shaft , the cooling member and the mounting base; the transmission set comprising a brushless motor and upper and lower brackets for the brushless motor; an electromagnetic coil in the brushless motor having a slotted concentrated winding linear brushless DC motor design and configured to drive the motor transmission shaft , the mounting base engaging the cooling member and connected to the motor transmission shaft via an eccentric shaft , the mounting base configured for assembly with the grinding disc to position the grinding disc adjacent to the opening , the control mechanism mounted outside of the housing ...

ELECTRIC TOOL

The electric tool including a motor having a stator and a rotor, a rotation shaft integrally rotating with the rotor, a casing accommodating the motor, a ventilating window disposed in the casing, a cooling fan sucking an air through the ventilating window to cool off the motor, a magnetic body disposed to the rotation shaft, a magnetic detection unit detecting a rotational position of the magnetic body, and a circuit substrate on which the magnetic detection unit is mounted. The circuit substrate and the magnetic body are disposed to be isolated from a wind path of a cooling wind generated by rotation of the cooling fan. 1. An electric tool , comprising:a motor having a stator and a rotor;a rotation shaft integrally rotating with the rotor;a casing accommodating the motor;a ventilating window disposed in the casing;a cooling fan sucking an air through the ventilating window to cool off the motor;a magnetic body disposed to the rotation shaft;a magnetic detection unit detecting a rotational position of the magnetic body; anda circuit substrate on which the magnetic detection unit is mounted;wherein the circuit substrate and the magnetic body are disposed to be isolated from a wind path of a cooling wind generated by rotation of the cooling fan.2. The electric tool as claimed in claim 1 , whereinthe circuit substrate is configured to extend in a direction orthogonal to an axial direction of the rotation shaft.3. The electric tool as claimed in claim 2 , further comprisinga control substrate on which a switch element is mounted, wherein the control substrate is disposed nearer to the ventilating window side than the circuit substrate.4. The electric tool as claimed in claim 3 , whereinthe control substrate is disposed to be isolated from the wind path of the cooling wind.5. The electric tool as claimed in claim 4 , whereinthe switch element is disposed on the control substrate, and at least a portion of the switch element is located within the wind path of the cooling ...

SELF-DEACTIVATING SHUT-DOWN SWITCH FOR A POWER TOOL

A power tool is provided including an electric motor, a power terminal receiving electric power form a power supply, an actuator, a power switch circuit disposed between the power terminal and the electric motor, and a controller controlling a switching operation of the power switch circuit. A power contact switch is coupled to the actuator and disposed on a first current path to selectively connect the power switch circuit to the power supply. A solid-state load switch disposed on a second current path from the power terminal to the controller is controllable via output of the power contact switch or a self-activating feedback signal from the controller. A solid-state override switch is provided controllable via a self-deactivating feedback signal from the controller and having an output commonly coupled to the output of the power contact switch to turn off the load switch even when the power contact switch is closed. 1. A power tool comprising:a housing;an electric motor disposed within the housing;a power terminal arranged to received electric power form a power supply;an actuator supported by the housing and engageable by a user to supply electric power from the power terminal to the electric motor;a power switch circuit disposed between the power terminal and the electric motor;a controller configured to control a switching operation of the power switch circuit to regulate power being supplied to the electric motor;a power contact switch coupled to the actuator and disposed on a first current path from the power terminal to the power switch circuit to selectively connect the power switch circuit to the power supply;a solid-state load switch disposed on a second current path from the power terminal to the controller, the solid-state load switch being controllable via at least one of an output of the power contact switch or a self-activating feedback signal from the controller; anda solid-state override switch controllable via a self-deactivating feedback signal ...

ELECTRIC POWER TOOL

An electric power tool includes a relay, an electric circuit, and an operation member. The relay has a coil, contacts, and an on-switch. The relay is configured such that the coil is energized when contacts are closed by an on-switch being pressed, and contacts are held in a closed state by an electromagnetic force of coil when coil is energized. In the electric circuit, electric power from power source is supplied to motor and coil of relay, and contacts are connected in series between power source and motor. The operation member is configured to move in reciprocating manner between tool stop position at which the motor stops and tool drive position which the motor runs, where the operation member is configured to locate away from on-switch of the relay at the tool drive position and configured to press the on-switch at a position other than tool drive position. 1. An electric power tool , comprising:a relay having a coil, a contact, and an on-switch, the relay configured such that the coil is energized when the contact is closed by the on-switch being pressed, the contact being held in a closed state by an electromagnetic force of the coil when the coil is energized;an electric circuit in which electric power from a power source is supplied to a motor and the coil of the relay, the relay contact being connected in series between the power source and the motor; andan operation member configured to be moved in a reciprocating manner between a tool stop position at which the motor stops and a tool drive position at which the motor runs, where the operation member is configured to be located away from the on-switch of the relay at the tool drive position, and is configured to press the on-switch at a position other than the tool drive position.2. The electric power tool according to claim 1 , further comprising a motor start switch that is connected in series to the contact of the relay claim 1 , wherein:the electric circuit is configured such that electric power is ...

Quick-Clamping Device for a Portable Machine Tool

A quick-clamping device for a portable machine tool, in particular for an angle grinder, includes at least one clamping unit and at least one control unit. The clamping unit includes at least one clamping element mounted movably with respect to a movement axis of the clamping unit so that the clamping unit is configured for tool-free fixing of an insertion tool unit to an output shaft of the portable machine tool. The control unit includes at least one movably mounted control element configured to actuate the clamping unit. The control element is mounted at least in a translatory and/or pivotable manner and is configured to transfer the clamping unit from a clamping position into a release position according to a movement of the control element. 1. A quick-change clamping device for a portable power tool , comprising:at least one clamping unit having at least one clamping element mounted movably with respect to a movement axis of the clamping unit such that the clamping unit is configured to fix an insert tool unit to an output shaft of the portable power tool without the use of any tools; andat least one control unit having at least one movably mounted control element configured to actuate the clamping unit, the control element mounted in at least one or more of a translational and a pivotable manner and configured to bring the clamping unit from a clamping position into a release position in dependence on a movement of the control element.2. The quick-change clamping device as claimed in claim 1 , wherein the control element is configured as a twist switch or as a rotary lever claim 1 , and has at least one movement axis that is at least substantially parallel to the movement axis of the clamping unit.3. The quick-change clamping device as claimed in claim 1 , wherein the control unit has at least one control gear unit that is configured to act in combination with the control element.4. The quick-change clamping device as claimed in claim 1 , wherein the control ...

SANDING APPARATUS

A sanding apparatus for sanding a vicinity of a drywall seam is provided comprising a housing structure including guide structures, a sanding roller, and a motor for driving the sanding roller such that the guide structures guide a sanding depth during sanding. The sanding apparatus further includes a vacuuming mechanism for capturing particles that result from sanding. 1. A vacuum sanding apparatus for sanding a drywall seam and vacuuming resulting sanding dust , the vacuum sanding apparatus comprising:a sanding assembly, the sanding assembly including a motor for driving a sanding roller about a drive axis for sanding a target surface;a handle for maneuvering the sanding assembly in sanding the target surface;a vacuuming mechanism including a vacuum channel structure that defines a vacuum channel fluidly connecting a vacuum nozzle of the channel structure and a vacuum generator, the vacuum nozzle disposed near the sanding roller for capturing sanding dust resulting from sanding the target surface; anda pair of guide structures attached to the sanding assembly for guiding a sanding depth of sanding the target surface.2. The vacuum sanding apparatus of claim 1 , wherein the channel structure is rigidly connected to the handle.3. The vacuum sanding apparatus of claim 1 , wherein the pair of guide structures engage a target surface for guiding the sanding depth.4. The vacuum sanding apparatus of claim 1 , wherein the sanding depth is determined by a distance between a sanding surface of the sanding roller and a point on the guide structures that is configured to engage the target surface when the target surface is being sanded for guiding the sanding depth.5. The vacuum sanding apparatus of claim 1 , wherein the handle is pivotably attached to the sanding assembly.6. The vacuum sanding apparatus of claim 1 , wherein the pair of guide structures are configured to move upon engaging the target surface during sanding.7. The vacuum sanding apparatus of claim 1 , wherein ...

HAND-HELD ELECTRIC POWER TOOL

A hand-held power tool includes a housing, a motor having a motor shaft, and a fan mounted onto the motor shaft and driven by the motor. The fan has a plurality of large and small fan blades arranged in a staggered form on a surface of the fan. Such arrangement of the fan blades effectively improve the heat dissipation efficiency of the power tool. 1. A hand-held power tool , comprising:a housing;a motor positioned in the housing, the motor having a motor shaft;a tool accessory device configured to support a tool accessory;an output shaft for driving the tool accessory and arranged substantially perpendicular to the motor shaft;a transmission mechanism configured to operably connect the motor shaft to the output shaft;a fan mounted onto the motor shaft and configured to be driven by the motor;a guide cover configured to receive the fan therein;wherein the housing has an air inlet and an air outlet and an external air flow flows through the motor and the fan via the air inlet and out of the housing via the air outlet;wherein the fan has a fan surface with a plurality of large and small fan blades positioned thereon and the large fan blades and the small fan blades are arranged such that each of the small fan blades is located between every two adjacent large fan blades;wherein each of the large fan blades and the small fan blades has a respective head located adjacent to the motor shaft, and a respective tail located away from the motor shaft;wherein the head of the large fan blade is disposed closer to the motor shaft along a radial direction of the fan than the head of the small fan blade;wherein the fan has a fan blade inlet between the heads of the large fan blade and the adjacent small fan blade, and a fan blade outlet between the tails of the large fan blade and the adjacent small fan blade; andwherein the fan blade inlet and the fan blade outlet are arranged such that, during operation of the power tool, a first inlet velocity at the fan blade inlet is ...

POLISHERS

A polisher may include a polishing pad, a motor, a transmission device, and a mode selection device. The transmission device can transmit a rotational drive force of the motor to the polishing pad in a plurality of different modes with respect to a motion of the polishing pad. The mode selection device may be used for selecting a desired motion mode of the output member. Additionally, a motor and handle housing with an accompanying power cord may be constructed to aid in ease of manipulation of the polisher by the user with minimal interference. 1. A polisher comprising:a polishing pad having a polishing surface and capable of polishing a target surface to be polished;a motor configured to generate a rotational drive force;an output member coupled to the polishing pad, so that the polishing pad moves together with the output member;a transmission device configured to transmit the rotational drive force of the motor to the output member in any one of a plurality of different modes with respect to a motion of the output member;a mode selection device coupled to the transmission device and configured to allow selection of one of the plurality of different modes, so that the output member moves according to the selected mode; anda transmission housing configured to support the transmission device;wherein the mode selection device is disposed at the transmission housing.2. The polisher according to claim 1 , wherein:the plurality of different modes comprise a first mode and a second mode;the first mode causes the output member to revolve about a first axis and to freely rotate about a second axis displaced from the first axis; andthe second mode causes the output member to revolve about the first axis while forcibly rotating the output member about the second axis.3. The polisher according to claim 2 , wherein:the transmission device comprises:a support shaft portion rotatably driven about the first axis by the rotational drive force of the motor;an eccentric shaft ...

POLE SANDER

A pole sander is provided including an elongate body having a longitudinal axis, and a sanding head attached via a pivot mechanism to a first end of the elongate body. The sanding head includes a hood including a plate and a sidewall to form a chamber, an output spindle projecting through the hood into the chamber, and an electric motor mounted on the hood and configured to rotatably drive the output spindle about a rotational axis. The pivot mechanism allows the sanding head to pivot around a pivot axis that intersects the sanding head forward of at least one of a centre of gravity of the sanding head or the rotational axis of the output spindle relative to the elongate body when the longitudinal axis of the elongate body is located parallel to the plane of the plate. 1. A pole sander comprising:an elongate body having a longitudinal axis; anda sanding head attached via a pivot mechanism to a first end of the elongate body, wherein the sanding head comprises: a hood including a plate and a sidewall to form a chamber, an output spindle projecting through the hood into the chamber, and an electric motor mounted on the hood and configured to rotatably drive the output spindle about a rotational axis,wherein the pivot mechanism allows the sanding head to pivot around a pivot axis that extends in a direction perpendicular to the longitudinal axis of the elongate body and parallel to the plane of the plate, wherein the pivot axis intersects the sanding head forward of at least one of a centre of gravity of the sanding head or the rotational axis of the output spindle relative to the elongate body when the longitudinal axis of the elongate body is located parallel to the plane of the plate.2. The pole sander of claim 1 , wherein the pivot axis is forward of the centre of gravity of the sanding head by a distance of between 5 mm and 10 mm.3. The pole sander of claim 1 , wherein claim 1 , when the pole sander is supported above a horizontal surface claim 1 , with the ...

POLE SANDER

A pole sander is provided including an elongate body having a first end and a second end and forming a passageway, a sanding head attached via a pivot mechanism to the first end of the elongate body and including an output spindle projecting into a chamber, an electric motor mounted on the sanding head, and a rear housing mounted on or proximate the second end of the elongate body including control electronics therein to control the motor via an electric cable. At least a portion of the electric cable locates against a flexible pipe connecting the passageway to the sanding head. 1. A pole sander comprising:an elongate body having a first end and a second end;a sanding head attached via a pivot mechanism to the first end of the elongate body, wherein the sanding head comprises a hood having a plate, a chamber formed under the plate, and an output spindle projecting into the chamber;an electric motor mounted on the sanding head and configured to rotatably drive the output spindle;a rear housing mounted on or proximate the second end of the elongate body, the rear housing including control electronics therein configured to control the motor via an electric cable;a tubular passage coupled to an aperture formed though the plate;a passageway formed in the elongate body to transport air; anda flexible pipe connecting the tubular passage to the elongate body to provide an airflow path between the chamber and the passageway, wherein at least a part of the electric cable locates against a side of the flexible pipe.2. The pole sander of claim 1 , further comprising a tubular sheaf surrounding both the flexible pipe and the at least part of the cable to fixedly support the electrical cable against the flexible pipe.3. The pole sander of claim 1 , wherein the motor is connected to the control electronics via a single continuous electric cable via which the electronic control signals and/or sensor signals are transmitted.4. The pole sander of claim 1 , wherein the elongate body ...

POLE SANDER

A handheld pole sander is provided including an elongate body having two ends, an electric motor electrically controlled by control electronics, and a sanding head attached via a pivot mechanism to a first end of the elongate body. The sanding head includes a hood and an output spindle projecting from the hood and rotatably driven by the electric motor. At least part of the elongate body includes a heat conductive part being at least partially made of heat conductive material. The control electronics are mounted on the elongate body adjacent to or in direct contact with the heat conductive part of the elongate body. 1. A handheld pole sander comprising:an elongate body having two ends;an electric motor electrically controlled by control electronics; anda sanding head attached via a pivot mechanism to a first end of the elongate body, wherein the sanding head comprises a hood and an output spindle projecting from the hood and rotatably driven by the electric motor;wherein at least part of the elongate body comprises a heat conductive part being at least partially made of heat conductive material, and the control electronics are mounted on the elongate body adjacent to or in direct contact with the heat conductive part of the elongate body.2. The handheld pole sander of claim 1 , wherein the heat conductive part of the elongate body is made claim 1 , at least in part claim 1 , from metal.3. The handheld pole sander of claim 1 , wherein the heat conductive part of the elongate body is made at least in part from aluminium tubing.4. The handheld pole sander of claim 1 , further comprising a rear housing mounted on a second end of the elongate body claim 1 , wherein the second end of the elongate body comprises heat conductive material and the control electronics are mounted inside the rear housing adjacent to or in direct contact with the heat conductive material of the second end of the elongate body.5. The handheld pole sander of claim 1 , wherein the elongate body ...

Pole sander

A pole sander is provided including an elongate body having a first end and a second end, an electric motor, and a sanding head attached via a pivot mechanism to the first end of the elongate body. The sanding head includes a hood including a plate and a peripheral wall formed on the underside of the plate around an edge of the plate; an output spindle that projects from the hood and is rotatably driven by the electric motor around a rotational axis; and a brush ring mounted on the underside of the plate adjacent the edge of the plate inside of the peripheral wall. The brush ring is attached to the plate via a spring comprising at least one of a leaf spring or a wave spring.

PROTECTION DEVICE FOR A POWER TOOL, AND SYSTEM WHICH COMPRISES A PROTECTION DEVICE AND A POWER TOOL

A protection device for a power tool is provided. The power tool can be, in particular, a hand-held battery-operated power tool, such as a cut-off grinder. The power tool preferably has main components in a main region, such as a motor, transmission and rechargeable batteries, which are protected effectively from mechanical damage, e.g. when dropped, by the protection device. Moreover, the protection device prevents the transmission of vibrations in the power tool to the user. In a second aspect, the invention relates to a system which comprises a protection device and a power tool. 19-. (canceled)10: A protection device for a power tool having a motor , a transmission and at least one rechargeable battery as main components , the power tool insertable into the protection device in such a way that the protection device surrounds the power tool , the protection device comprising:a plurality of contacts points configured to establish a connection between the power tool and the protection device; anddamper elements provided at the contact points and configured to be between the power tool and the protection device.11: The protection device as recited in wherein a number of the damper elements is two to ten.12: The protection device as recited in wherein the number of the damper elements is three to five.13: The protection device as recited in wherein the damper elements define decoupling regions each having one damper element or two damper elements.14: The protection device as recited in further comprising a first grip claim 10 , a second grip and a protection frame.15: The protection device as recited in wherein the protection frame has a double-L-shaped structure configured to surround a lower side of the power tool.16: The protection device as recited in wherein the first grip includes at least one operating element for operating the power tool.17: The protection device as recited in wherein the second grip has an annular structure configured to surround a ...

HANDHELD SANDER

A handheld sander includes a main body, an extension arm, a follower draft, and a transmission shaft. The main body includes a housing and a drive shaft rotatably disposed in the housing. The extension arm includes a pivot portion rotatably connected with the housing in a way that the extension arm is rotatable relative to the housing, a distal portion opposite to the pivot portion, and an internal accommodation penetrating through the pivot portion and the distal portion. The follower shaft is rotatably disposed in the distal portion of the extension arm. The transmission mechanism is disposed in the internal accommodation and connected between the drive shaft and the follower shaft for transmitting a rotational power from the drive shaft to the follower shaft. As such, the handheld sander can perform a grinding work in a limit, narrow working space. 1. A handheld sander , comprising:a main body including a housing and a drive shaft rotatably disposed in the housing in a way that the drive shaft is rotatable relative to the housing about a first axis;an extension arm including a pivot portion rotatably connected with the housing of the main body in a way that the extension arm is rotatable relative to the housing about the first axis, a distal portion opposite to the pivot portion, and an internal accommodation penetrating through the pivot portion and the distal portion;a follower shaft rotatably disposed in the distal portion in a way that the follower shaft is rotatable about a second axis that is parallel to and spaced from the first axis; anda transmission mechanism disposed in the internal accommodation of the extension arm and connected between the drive shaft and the follower shaft for transmitting a rotational power from the drive shaft to the follower shaft.2. The handheld sander as claimed in claim 1 , wherein the pivot portion of the extension arm has a tubular shape claim 1 , through which the drive shaft extends into the internal accommodation.3. The ...

Hand-Held Machine Tool Having an Electronically Commutated Electric Motor as Direct Drive

A hand-held machine tool has an electric-motor drive and a machining tool. The electric-motor drive has an electronically commutated electric motor, and the electric-motor drive is provided to drive the machining tool. The electronically commutated electric motor has an outer diameter, and a ratio of the outer diameter of the electronically commutated electric motor to a diameter of the machining tool is a maximum of 0.42. 1. A hand-held machine tool , comprising:an electromotive drive; anda machining tool, wherein:the electromotive drive has an electronically commutated electric motor and is configured to drive the machining tool,the electronically commutated electric motor has an outside diameter, anda ratio of the outside diameter of the electronically commutated electric motor to a diameter of the machining tool is at most 0.42.2. The hand-held machine tool as claimed in claim 1 , wherein:the electronically commutated electric motor has a rotation speed, anda ratio of the rotation speed of the electronically commutated electric motor to the diameter of the machining tool is at most 28.5 rpm/mm.3. The hand-held machine tool as claimed in claim 1 , wherein:the electronically commutated electric motor has a height, anda ratio of the height of the electronically commutated electric motor to the diameter of the machining tool is at most 0.36.4. A hand-held machine tool claim 1 , comprising:an electromotive drive, which has an electronically commutated electric motor and is configured to drive a machining tool,wherein a ratio of a diameter of the machining tool minus an outside diameter of the electronically commutated electric motor to a rotation speed of the electronically commutated electric motor is 1 mm*min/50.5. The hand-held machine tool as claimed in claim 1 , wherein the electronically commutated electric motor is an external rotor motor.6. The hand-held machine tool as claimed in claim 1 , wherein the electronically commutated electric motor directly drives ...

Power tool dust port connector mechanism

A connector mechanism that connects a dust bag or other accessory to a power tool. The connector mechanism including a collar assembly having proximal and distal ends, the proximal end engaging the power tool and the distal end comprising a plurality of castellations radially spaced about an interior surface thereof for non-selectively engaging a plurality of castellations on the power tool to establish a mating interface between the collar assembly and the dust port; and a plurality of locking members radially spaced about the collar assembly to establish a locking relationship between the collar assembly and the dust port.

CUTTING TOOL ASSEMBLY

A cutting tool assembly can include a handheld and non-planar electromechanical cutting device. The handheld and non-planar electromechanical cutting device can include a handle portion, a driving motor, a switch, and a rotatable shaft projecting out of the handle portion and configured to receive a cutting disc. The rotatable shaft can be driven by the driving motor. The cutting tool assembly can also include a first post extending from a first lateral side of the handle portion and a second post extending from a second lateral side of the handle portion. The cutting tool assembly can also include a base plate having a first channel and a second channel. The channels can be sized to receive the posts for sliding engagement. 1. A cutting tool assembly comprising: a handle portion extending along a first longitudinal axis,', 'a driving motor at least partially disposed in said handle portion,', "a switch operable to selectively activate said driving motor and positioned on said handle portion such that a user's hand can engage the switch while grasping said handle portion and at least partially encircling said driving motor, and", 'a rotatable shaft projecting out of said handle portion and configured to receive a cutting disc, said rotatable shaft driven by said driving motor and extending along a second longitudinal axis transverse to said first longitudinal axis;, 'a handheld and non-planar electromechanical cutting device havinga first post extending from a first lateral side of said handle portion along a third longitudinal axis transverse to said first longitudinal axis and parallel to said second longitudinal axis;a second post extending from a second lateral side of said handle portion along said third longitudinal axis; and a first channel with a first bottom and first and second side walls extending from opposite sides of said first bottom to a first open top, said first open top sized to receive said first post, said first channel sized such that said ...

SPACER DEVICE FOR A GRINDING ROLLER

A spacer device for a grinding roller, in particular of a grinding machine, including a main body to which at least two rolling bodies are rotatably mounted and wherein the spacer device can be supported by way of the at least two rolling bodies against a surface to be ground during a grinding process. At least one fixing device is arranged, preferably centrally, between the at least two rolling bodies and with which the grinding roller can be preferably releasably fixed to the spacer device. Furthermore, an adjusting device allows the grinding roller in a state of being fixed to the spacer device to be adjustable relative to the main body and/or at least one of the at least two rolling bodies. 1. A spacer device for a grinding roller , in particular of a grinding machine , including a main body to which at least two rolling bodies are rotatably mounted and wherein the spacer device can be supported by way of the at least two rolling bodies against a surface to be ground during a grinding process , wherein there is provided at least one fixing device which is arranged , preferably centrally , between the at least two rolling bodies and with which the grinding roller can be preferably releasably fixed to the spacer device and that there is provided at least one adjusting device with which the grinding roller in a state of being fixed to the spacer device is adjustable relative to the main body and/or at least one of the at least two rolling bodies.2. The spacer device as set forth in claim 1 , wherein the grinding roller in the state of being fixed to the spacer device is rotatable relative to the main body about a joint axis of the spacer device claim 1 , wherein the joint axis is substantially congruent with an axis of rotation of the grinding roller.3. The spacer device as set forth in claim 1 , wherein the grinding roller in the state of being fixed to the spacer device is axially spaced from the adjusting device claim 1 , wherein a pivot axis of the at least one ...

HANDHELD SANDING DEVICE

A handheld sanding device according to the present invention includes: a power generation unit configured to generate rotating force for sanding operation; a power transmission unit configured to be coupled to the power generation unit, and to transmit the rotating force generated by the power generation unit; a sanding unit configured to be rotated by the rotating force, transmitted through the power transmission unit, in order to sand a sanding target surface; and a shaft coupling unit configured to connect the power transmission unit and the sanding unit to each other so that the sanding unit is freely inclined based on the power transmission unit, thereby improving the close contact between the sanding target surface and the sanding unit while making it easy to carry and also preventing the sanding target surface from being eccentrically worn during sanding operation. 1. A handheld sanding device comprising:a power generation unit configured to generate rotating force for sanding operation;a power transmission unit configured to be coupled to the power generation unit, and to transmit the rotating force generated by the power generation unit;a sanding unit configured to be rotated by the rotating force, transmitted through the power transmission unit, in order to sand a sanding target surface; anda shaft coupling unit configured to connect the power transmission unit and the sanding unit to each other so that the sanding unit is freely inclined based on the power transmission unit.2. The handheld sanding device of claim 1 , wherein the shaft coupling unit comprises:a fixed shaft portion comprising a fixed shaft configured to be coupled to the power transmission unit and to be rotated by the rotating force transmitted through the power transmission unit and a separation prevention ball configured to extend from the fixed shaft; anda rotating shaft portion comprising an autonomous rotation block configured to be provided with a ball movement cavity into and on ...

Protective Device for a Hand-Held Power Tool

A protective device for a hand-held power tool, in particular an angle grinder, includes a machine housing, a protective hood, and a securing element. The machine housing has a flange neck that surrounds an output shaft that defines an output axis. The protective hood has a protective hood collar. The securing element is formed as a securing ring that is configured, in at least one operating state, to prevent the protective hood from twisting relative to the machine housing. The machine housing is configured to be detachably connected to one or more of the protective hood and the securing element. The securing ring has a thread, in particular an internal thread, which in at least one connection state is configured to movably mount and hold the protective hood in an axial direction of the output axis relative to the flange neck. 1. A protective device for a hand-held power tool , comprising:a machine housing having a flange neck that surrounds an output shaft, the output shaft defining an output axis;a protective hood having a protective hood collar; anda securing element configured as a securing ring, the securing ring configured, in at least one operating state, to lock the protective hood against rotation with respect to the machine housing,wherein the machine housing is configured to be detachably connected to one or more of the protective hood and the securing element, andwherein the securing ring has a thread that is configured, in at least one connection state, to mount the protective hood such that the protective hood is movable, with respect to the flange neck, in an axial direction of the output axis.2. The protective device as claimed in claim 1 , wherein the machine housing has a tooth geometry that extends in the axial direction of the output axis.3. The protective device as claimed in claim 1 , wherein the machine housing has a radial material recess that extends in a circumferential direction around the output axis.4. The protective device as claimed ...

ELECTRIC TOOL

The electric tool including a motor having a stator and a rotor, a rotation shaft integrally rotating with the rotor, a casing accommodating the motor, a ventilating window disposed in the casing, a cooling fan sucking an air through the ventilating window to cool off the motor, a magnetic body disposed to the rotation shaft, a magnetic detection unit detecting a rotational position of the magnetic body, and a circuit substrate on which the magnetic detection unit is mounted. The circuit substrate and the magnetic body are disposed to be isolated from a wind path of a cooling wind generated by rotation of the cooling fan. 1. An electric tool , comprising:a stator, having a coil;a motor, having a rotor capable of rotating with respect to the stator;a casing, accommodating the motor and having a ventilating window;a controller, controlling a power supply to the coil; anda cooling fan, sucking an air through the ventilating window to cool off the motor,wherein a rotation shaft of the motor extends in a front-rear direction,the casing has a motor casing integrally formed in a substantially cylindrical shape, the stator has an insulator,a bearing holding part holding a bearing that supports a rotation of the rotor is disposed at the motor casing,in the motor casing, a cover member is located between the ventilating window and the stator and is connected to the bearing holding part, and the cover member is configured to be cooperate with the insulator to prevent a dust from flowing into a space the rotor is disposed.2. The electric tool as claimed in claim 1 , whereinthe cover member is configured to extend toward a front direction from the bearing holding part.3. The electric tool as claimed in claim 1 , whereinthe insulator and the cover member are overlapped in a vertical direction perpendicular to the front-rear direction.4. The electric tool as claimed in claim 1 , whereinon a periphery of the bearing holding part where the cover member is connected, a through hole ...

HAND HELD POWER TOOL

The present specification relates to a hand held power tool comprising a housing, the housing comprising a back handle portion at a back end thereof. And a front handle portion at a front end thereof, wherein a motor is arranged in the back handle portion and coupled to an outgoing axle extending through the front handle portion. Wherein the front handle portion comprises an inner tubular structure and an outer tubular gripping sleeve. The outer tubular gripping sleeve is circumferentially supported by at least two vibration absorbing resilient elements arranged around the inner tubular structure, such that a circumferential gap is formed between the inner tubular structure and the outer tubular gripping sleeve. 11. A hand held power tool () comprising:{'b': 10', '10, 'a housing (), the housing () comprising'}{'b': '20', 'a back handle portion () at a back end thereof; and'}{'b': 40', '20', '50', '40', '40', '60', '70', '70', '81', '82', '60', '60', '70, 'a front handle () portion at a front end thereof, wherein a motor is arranged in the back handle portion () and coupled to an outgoing axle () extending through the front handle portion (), wherein the front handle portion () comprises an inner tubular structure () and an outer tubular gripping sleeve (), and wherein the outer tubular gripping sleeve () is circumferentially supported by at least two vibration absorbing resilient elements (, ) arranged around said inner tubular structure (), such that a circumferential gap is formed between said inner tubular structure () and said gripping sleeve ().'}21. The hand held power tool () according to claim 1 , wherein the at least two vibration absorbing resilient elements are vibration absorbing resilient rings.31. The hand held power tool () according to any of or claim 1 , wherein the at least two vibration absorbing resilient elements have an arc shaped profile.41. The hand held power tool () according to any of to claim 1 , wherein the at least two vibration ...

Machine tool

A machine tool ( 1 ) is provided, in particular an angle grinder, including a spindle ( 8 ) that can be driven about a rotational axis (L), a device ( 9 ) being provided which can be fixed to the spindle ( 8 ) by a rotary connection. A separate securing device ( 26 ) is provided which is operatively connected to the spindle ( 8 ), which is arranged on the output side of the device ( 9 ), at least in some regions, and which, at least during operation of the machine tool ( 1 ), has a smaller outer diameter ( 28 ), at least in some regions, with respect to the rotational axis (L) than an outer diameter ( 14 ) of the spindle ( 8 ).

DUST COVER FOR A CUTTING GRINDER

A dust hood (), including a flange () for fastening the dust hood () to a transmission extension housing () of an angle grinder (), and including a hood body () for covering a circular cutting wheel () on both sides, at least in sections, and including a suction connecting piece () for connecting a suction hose (), via which removed substrate material (UG) may be extracted from the hood body (), the dust hood () including a sensor unit (), with the aid of which it is possible to detect whether the suction hose () is connected to the suction connecting piece () and/or whether a flap () of the suction connecting piece () is open. 110-. (canceled)11. A dust hood comprising:a flange for fastening the dust hood to a transmission extension housing of an angle grinder;a hood body for covering a circular cutting wheel on both sides, at least in sections;a suction connecting piece for connecting a suction hose, removed substrate material being extractable from the hood body via the suction connecting piece; anda sensor unit, a detection of whether the suction hose is connected to the suction connecting piece or whether a flap of the suction connecting piece is open being possible with the aid of the sensor unit.12. The dust hood as recited in further comprising a signal line claim 11 , a sensor signal coming from the sensor unit tappable via the signal line for the purpose of predefining the rotational direction for the cutting wheel of the angle grinder.13. The dust hood as recited in wherein the signal line is guided through the flange of the dust hood.14. The dust hood as recited in wherein the sensor unit includes a flap contact claim 11 , the detection of whether the flap of the suction connecting piece is open or closed being possible with the aid of the flap contact.15. The dust hood as recited in wherein the sensor unit includes a connecting piece contact claim 11 , the detection of whether the suction hose is connected to the suction connecting piece being possible ...

GRINDER DUST SHROUD WITH INPUT SHAFT GASKET AND ADJUSTABLE MOUNTING MECHANISM

An angle grinder dust collection shroud includes mounting brackets which are attached to a shroud body via slots which allow the mounting brackets to move to different circumferential locations around the output shaft of the angle grinder as well and inwardly towards and outwardly away from the output shaft of the angle grinder. The mounting brackets are adjustable in their position around the angle grinder output shaft to allow them to engage the angle grinder while avoiding any mounting features for the angle grinder's stock blade guard. 1. An angle grinder dust collection shroud comprising:a shroud body having an upper portion and a peripheral sidewall extending downwardly from the upper portion to form a dust collection chamber;an exhaust port attached to the shroud body, the exhaust port having an opening which is connected to the dust collection chamber;an output shaft hole in the shroud body which is sized and positioned to receive an angle grinder output shaft therethrough;a plurality of mounting brackets attached to the shroud body is spaced locations around the output shaft hole;wherein each of the plurality of mounting brackets is movable towards and away from the output shaft hole to adjust a distance between the mounting brackets;wherein a first mounting bracket of the plurality of mounting brackets is attached to the shroud body such that it is movable towards the output shaft hole at a first angular location around the output shaft hole and such that it is movable towards the output shaft hole at a second angular location around the output shaft hole which is circumferentially spaced apart around the output shaft hole from the first angular location; andwherein the shroud body is attachable to an angle grinder via the plurality of mounting brackets so that an angle grinder output shaft extends into the dust collection chamber and so that a grinding attachment is attached to the angle grinder output shaft and disposed in the dust collection chamber.2. ...

Water jet reaming tool

The water jet reaming tool can avoid the need to replace a toilet ( 17 ). The curved handle ( 19 ) allows the user to stay at arm's length away from the difficult removal of mineral deposits ( 13 ) which prevent sufficient clean water ( 14 ) to flush the toilet. A reamer element ( 12 ) stands ready at the other end of the handle ( 19 ) to enter a clean water jet ( 15 ) under the toilet inner rim ( 16 ). The user views ( 11 ) the water jet ( 15 ) and the point 26 via lines of sight ( 18 ) from the reflection in the metal mirror ( 30 ) attached to the reamer element ( 12 ). The user's wrist motions cause the handle ( 19 ) to rotate the reamer element ( 12 ) and grind the mineral deposits ( 13 ) to dust.

ELECTRIC TOOL

An electric tool is provided. The electric tool prevents anomalies in motor rotation due to dust and moisture sucked in together with a cooling wind, and is configured such that rotational position detection operations and switch operations are not affected. In the electric tool which drives a brushless DC motor using a controller, a magnetic body for rotational position detection is provided on a rotation shaft which can rotate integrally with a rotor, Hall ICs are provided to detect the rotational position of the magnetic body and output a position signal to the controller, and the magnetic body and the Hall ICs mounted on a substrate are arranged in a region isolated from the wind path of the cooling wind generated by rotation of a cooling fan. The Hall ICs are accommodated in a housing filled with resin. 1. An electric tool , comprising:a stator, having a coil;a motor, having a rotor capable of rotating with respect to the stator;a casing, accommodating the motor and having a ventilating window;a controller, controlling power supply to the coil; anda cooling fan, sucking an external gas through the ventilating window to cool off the motor,wherein a magnetic body for rotational position detection is disposed to a rotation shaft capable of integrally rotating with the rotor, a magnetic detection unit detecting a rotational position of the magnetic body is disposed to output a position signal to the controller, and the magnetic detection unit and the magnetic body are disposed to be isolated from a wind path of a cooling wind generated by rotation of the cooling fan.2. The electric tool as claimed in claim 1 , wherein:the controller is disposed in a housing defining an isolated area not exposed to the cooling wind, and the housing is disposed by extending to a proximity of the magnetic body, so as to accommodate the magnetic detection unit in the housing.3. The electric tool as claimed in claim 2 , wherein:the housing is formed of a non-magnetic material, and, as a ...

Long rod grinding machine

A long rod grinding machine reduces the likelihood of dust escaping and falling. The long rod grinding machine includes a head and a rod having an end connected to the head and extending in a front-rear direction. The head includes an electric motor, a pad movable with a driving force from the electric motor, a vertical wall surrounding a radially outer edge of the pad, and a contact member located between the vertical wall and the pad and surrounding the radially outer edge of the pad. The contact member includes a brush holder having one or more through-holes extending in a radial direction of the pad, and a brush located below the brush holder and having a lower end located downward from a lower end of the vertical wall.

PAINTED SURFACE SANDING TOOL

A sanding tool is disclosed that can be used to remove a raised defect or imperfection from a painted surface. The sanding tool includes a base that defines an arcuate guide surface configured to be placed in contact with the base. In general, the base supports a sanding element for movement with respect to the base in a sanding motion. The guide surface maintains the sanding element at a desired position with respect to the painted surface while the sanding element moves in the sanding motion. An offset of the sanding element with respect to the guide surface can be selectively adjusted in certain embodiments. In some embodiments the guide surface is defined by first and second prongs spaced apart widthwise of the base, with the sanding element mounted between the prongs. A convex oscillating point sanding element is also disclosed. 1. A sanding tool for removing a raised defect from a painted surface , the sanding tool comprising:a handheld base having a height and comprising an arcuate guide surface that is curved along the height, the guide surface being configured for engagement with the painted surface;an arm mounted on the base for movement along the height of the base with respect to the guide surface through a range of motion, the arm being configured to mount a sanding element having a sanding surface on the arm for movement with the arm with respect to the base, the arm being configured such that the sanding element mounted on the arm is movable with respect to the arm in a sanding motion; anda locking mechanism configured to selectively lock the arm in position with respect to the base at a plurality of positions along the range of motion, wherein the arm is configured to position the sanding element such that the sanding surface has a different offset from the arcuate guide surface along the height of the base at each of the plurality of positions of the arm.2. A sanding tool as set forth in claim 1 , wherein the guide surface includes a first surface ...