Insertable splitting wedge with protective strip for firewood and all types of joinery circular saws

Published without abstract.

Portable circular saw with adjustable splitting wedge

In a portable circular saw (10) with a splitting wedge (16), the cutting depth can be varied by rotating the housing (12), in which the saw blade (14) is arranged, about an end of the frame of the saw. The splitting wedge (16) is carried by an arm (17) which is rotatable about the shaft (15) of the saw blade (14). A first slot (22) in the housing (12) itself, a second slot (24) in a carrier (18) on the saw shoe (11) of the saw and a third slot (23) in the arm (17) are adapted to a locking pin (19) of the housing (12) in a position chosen as a function of the cutting depth. This mutual action of slots (22, 23, 24) and locking pin (19) enables an optimum coplanar position of saw blade (14) and splitting wedge (16) to be maintained. ...

Worktable having an adjustable shield

Improvements in or relating to motor driven hand tools

... 1,145,245. Sawing. JOACHIM CSAKI, [trading as ACKERMANN U. SCHMITT K.G.]. 23 March, 1967 [25 March, 1966], No. 13871/67. Heading B5L. A hand jig saw comprises a holder 16 for a saw blade 15 and driving means 11 therefor, a slide skid 24 for supporting the saw on a workpiece 25, and guide means 21 mounted on the saw and extendable into a saw kerf. The driving means consists of an electric motor disposed in a casing 11a connected by a clip 22 to the slide skid 24. A bearing block 18 is secured to the casing and pivotally supports the guide means 21 which consists of a plate movable from the position shown wherein it extends through an aperture 24a in the slide skid into the kerf 25a cut by the saw blade to an upper position away from the kerf, a catch 26 releasably locking the plate in its operative and inoperative positions. In another embodiment, the guide means consists of a plate 31, Fig. 4, on a bolt 31a which can be secured by a nut along an arcuate slot 32a in the skid plate and angularly ...

SÄGEMASCHINE UND VERFAHREN ZUM ZUSCHNEIDEN VON WERKSTÜCKEN MITTELS EINER SOLCHEN SÄGEMASCHINE

The machine has a machine table (1), and a sawing aggregate (3) movably guided along the machine table. A saw blade (5) of the sawing aggregate partially penetrates a gap, which extends along a guideway of the aggregate in the machine table in an operating position. A splitting wedge (7) is brought into the gap of the machine table to prevent jamming of saw bade at the work piece. The splitting wedge is movably guided over a section of the guide way of the sawing aggregate along a guidance (4). The splitting wedge is arranged at the saw carriage, which carries the aggregate. An independent claim is also included for a method for cutting a workpiece.

SÄGEMASCHINE UND VERFAHREN ZUM ZUSCHNEIDEN VON WERKSTÜCKEN MITTELS EINER SOLCHEN SÄGEMASCHINE

The machine has a machine table (1), and a sawing aggregate (3) movably guided along the machine table. A saw blade (5) of the sawing aggregate partially penetrates a gap, which extends along a guideway of the aggregate in the machine table in an operating position. A splitting wedge (7) is brought into the gap of the machine table to prevent jamming of saw bade at the work piece. The splitting wedge is movably guided over a section of the guide way of the sawing aggregate along a guidance (4). The splitting wedge is arranged at the saw carriage, which carries the aggregate. An independent claim is also included for a method for cutting a workpiece.

TABLE CIRCULAR SAW

TABLE SAWING PROTECTION

LOWER FLOOR PANEL AEG MACHINE

SÄGEEINRICHTUNG

CIRCULAR SAW WITH A FROE.

PROCEDURE AND DEVICE FOR THE SEPARATION OR SLITTING STARING A CUT PROPERTY.

Die Erfindung betrifft eine Vorrichtung (1) zum Absägen einer Lamelle (2) von einem Substrat (3). Die Vorrichtung (1) umfasst ein Sägemittel (4) mit einer im Wesentlichen horizontal angeordneten Schnittebene (5), welches Sägemittel (4) dazu ausgebildet ist, die Lamelle (2) im Bereich der Unterseite (6) des Substrats (3) abzusägen, ein Transportmittel (12), das dazu ausgebildet ist, das Substrat (3) in Längsrichtung dem Sägemittel (4) entlang einer Transportrichtung (9) zuzuführen, und einen Spaltkeil (10), der im Bereich des Schneidespalts (11) dem Sägemittel (4) nachgelagert angeordnet ist, wobei die Lamelle (2) unterhalb des Sägemittels (4) und des Spaltkeils (10) wegführbar ist. Die Vorrichtung (1) umfasst im Bereich des Spaltkeils (10) einen Sensor (15), welcher Sensor (15) ausgebildet ist, an zumindest einem Messpunkt (16) oder entlang zumindest eines Messbereichs (17) zumindest einen Qualitätsparameter (19) der Lamelle (2) zu ermitteln.

DEVICE FOR DIVIDING ROUND TIMBER.

UNIVERSAL ELEVATION AND SPREADER

Table saw

A table saw includes a table, a saw unit movably coupled underneath the table, a riving knife extending through the table, and a quick-release assembly selectively coupling the riving knife to the table. The quick-release assembly includes a mounting plate coupled to the table and a clamping plate movable relative to the mounting plate between a clamping position, in which the riving knife is clamped between the mounting plate and the clamping plate to secure the riving knife to the table, and a release position, in which the riving knife is releasable from the table. The quick-release assembly further includes a pin coupled for movement with the clamping plate and a handle pivotably coupled to the pin. The pin has a cam portion engageable with the saw unit. The clamping plate is movable between the clamping positon and the release position in response to pivoting movement of the handle.

CUTTER MECHANISM FOR FLEXIBLE ELONGATE MATERIAL

TABLE SAW

A table saw including a table, an opening in the table through which a saw blade extends, and a throat plate receivable within the opening. The throat plate includes a top surface that is co-planar with a top surface of the table. The table saw further includes an anti-kickback pawl disposed above the throat plate and a wear plate coupled to the throat plate in facing relationship with the anti-kickback pawl, where at least a portion of the wear plate is sub-flush with the top surface of the throat plate.

APPARATUS AND METHOD FOR CUTTING OR SLOTTING RIGID MATERIAL, IN PARTICULAR WOOD

An apparatus and a method serve for cutting elongate pieces of wood having a modulus of elasticity between 50,000 and 400,000 kg/cm'. A circular saw blade is provided having a plurality of spaced peripheral teeth. The saw blade is rotated about an axis at a cutting speed exceeding 40 m/s. The pieces of wood are displaced relative to the saw blade along a feeding direction extending perpendicular to the saw blade axis of rotation. A stationary bending element is arranged on a broad side of the saw blade adjoining the cutting teeth. The bending element has a radially profiled surface with a thickness increasing towards the axis and decreasing towards the cutting teeth. The saw blade can be used to cut a slot into the pieces of wood along the feeding direction, thus generating a first and a second section of the pieces of wood. The bending element ensures that the first section is lifted from the saw blade immediately after the formation of the slot. A deflection element is arranged at a first ...

Sägeschnitt-Keil.

Vorrichtung mit Keil, insbesondere zum Auseinandersprengen von Holz und dergl.

Handkreissäge.

Vorrichtung zum Fällen von mit Fällkerbe versehenen und eingeschnittenen Bäumen.

Schutzhaube an Elektrohandkreissägen.

Kreissäge mit einem dem Sägeblatt nachgeschalteten Spaltkeil

Handkreissäge

Motorisch angetriebene Handstichsäge

Kreissäge

Method of shortening elongated workpieces with angular and dimensional accuracy

Jig saw with bearing plate which can be fastened to the saw housing

WORKPIECE TIGHTENER FOR HACK SAW MACHINES.

electrical portable circular sawsprotection hood guidance wherein

Procede de tronconnage de bobines de films en matiere plastique et dispositif pour sa mise en oeuvre

Procede de tronconnage de bobines de films en matiere thermoplastique constituees par un enroulement de spires sur un mandrin en carton ou en matiere plastique rigide, caracterise en ce que a) on met en contact, par tout moyen approprie, une bobine de film animee d'un mouvement de rotation de vitesse w1 avec au moins une fraise-scie metallique tournant a contre-sens avec une vitesse w2 superieure a w1, ladite fraise-scie etant pourvue d'une denture ebaucheuse et finisseuse a coupes alternees b) on assure la penetration de la fraise-scie dans la bobine par tout moyen exercant une force sur cette derniere et/ou sur la fraise-scie, c) on procede au refroidissement et a la lubrification de l'aire de contact entre la bobine et la fraise-scie par tout moyen approprie. Appareillage pour la mise en oeuvre de ce procede comportant une fraise-scie metallique, un moyen de refroidissement et de lubrification de l'aire de coupe et un moyen de mise en rotation de la bobine a contresens de la fraise-scie ...

Tree-felling wedge inserted in saw-cut - has two jaws with wedge joined to thrust-piece hydraulically or pneumatically powered

DEVICE Of ANTI-LOCKING FOR CHAIN SAWS

L'INVENTION CONCERNE UN DISPOSITIF D'ANTI-BLOCAGE POUR SCIES A CHAINE. DES BILLES 4 ALTERNEES DE PART ET D'AUTRE DES FLASQUES 2 ET 3 SONT LOGEES DANS DES ORIFICES 1A AMENAGES DANS L'AME CENTRALE 1 PRENNENT APPUI DANS DES CUVETTES SPHERIQUES 2A OU 3A AMENAGEES SUR LE COTE INTERNE DES FLASQUES 2 OU 3 ET DEPASSENT EXTERIEUREMENT A TRAVERS D'ORIFICES AMENAGES DANS L'AUTRE FLASQUE 2 OU 3. PRINCIPALE APPLICATION: TRONCONNEUSE PORTATIVE. THE INVENTION RELATES TO AN ANTI-LOCKING DEVICE FOR CHAIN SAWS. BALLS 4 ALTERNATE ON EITHER SIDE OF THE FLANGES 2 AND 3 ARE LOCKED IN ORIFICES 1A PROVIDED IN THE CENTRAL CORE 1 BE SUPPORTED IN SPHERICAL CUVETTES 2A OR 3A PROVIDED ON THE INTERNAL SIDE OF FLANGES 2 OR 3 AND EXCEED OUTSIDE THROUGH ORIFICES MADE IN THE OTHER FLANGE 2 OR 3. MAIN APPLICATION: PORTABLE CUT-OFF MACHINE.

TREE FELLING WEDGE

Improved structure for chopper that can be ascended and descended with saw blade of circular saw machine

Positioning device for blade of cutter

OPTICAL ALIGNMENT DEVICE FOR A TABLE SAW

A table saw (100) includes a workpiece support surface (146) and a laser apparatus (212). The workpiece support surface (146) defines a blade opening through which a cutting blade (164) is configured to extend. The laser apparatus (212) is configured to emit a laser light (236) away from the workpiece support surface (146).

Riving knife assembly for table saws

A power tool having a base assembly, a table supported by the base assembly, a saw assembly supported by the table, and a riving knife assembly attached to the saw assembly. The riving knife has a body with an edge placed adjacent to a blade, and a bracket connected to the body. The bracket is inserted into a support assembly disposed on the saw assembly.

SLAB GUIDE FOR VERTICALLY ADJUSTABLE SAWING APPARATUS

Machine for cutting plates from timber

A machine includes a number of saw blades rotatably supported on a spindle for cutting a timber into a number of panels. One or more feeder rollers may feed the timber through the saw blades. A number of cutter elements are disposed between the saw blades for forming a gap between the saw blades and for machining a rounded edge to each of the panels. A milling cutter is rotatably supported in front of the saw blades and includes one or more milling blades for machining the timber to form a number of rounded bulges before the timber is cut into the panels by the saw blades.

ANTI-KICKBACK DEVICE FOR A TABLE SAW MACHINE

An anti-kickback device includes a riving knife mounted rearwardly of a saw blade of a table saw machine and having a retaining hole. An elongate mount has a cavity and an insert groove to receive the plate body such that the retaining hole is located in the cavity. A fastening unit includes a post which is received in the cavity, which straddles a top surface of the knife, and which has a radial bore registered with the retaining hole, a detent body disposed in the radial bore and movable to extend into or to be clear of the retaining hole to thereby permit the mount to be secured to or detached from the knife, a tubular actuator which has an inner cam surface configured to move the detent body, and an operating member manually operable to move the actuator.

Table saws with safety systems and systems to mount and index attachments

Table saws and table saws designed to implement safety systems that detect contact between a person and a dangerous portion of the saw are disclosed. Table saw components, mounting systems for table saws, and table saw attachments are also disclosed. One embodiment may include a first clamp surface, a second clamp surface spaced apart from the first clamp surface so that a base portion of a riving knife or splitter can be placed between the clamp surfaces with the opposing sides of the base portion generally parallel to the first and second clamp surfaces.

Table saw

Elevation and blade tilt mechanisms for table saws are disclosed. The elevation and tilt mechanisms may include an indexable position adjustment system configured to adjust the position of the blade relative to the table in discrete increments. Such table saws may also include a trunnion assembly with an elevation carriage slideably mounted to front and rear brackets, the brackets being tiltable with the elevation carriage relative to the table, and the elevation carriage being adapted to maintain the tilt of each bracket relative to the other bracket in a fixed orientation.

Universal lifting device and spreader

A modular guard system and apparatus for a power saw

The present invention provides an apparatus for a power saw of the type which has a table top, a rotatable circular saw blade that is vertically adjustable relative to the table top, the table top having an opening through which the saw blade can extend, the blade being configured to cut a work piece as the work piece is forwardly moved from a forward position to a rearward position, said apparatus comprising: a riving knife mechanism releasably mounted to the saw rearwardly of the blade, and being configured to be adjustable between retracted and extended positions relative to the blade, the mechanism having an elongated relatively thin knife that is mounted substantially in the same plane as the blade, the outer upper end of said knife being capable of being positioned below the table top when in its retracted position and extending to an elevation at least approaching the upper reach of the blade when in its extended position.

Строительный элемент

Изобретение отйосится к строительным элементам для конструкции стен и перекрытий.-Цель изобретения - улучшение эксплуатационных качеств элемента. Строительный элемент типа сэндвич содержит изолирующую плиту 1 из пенополистирола или полиуретана; наружные металлические листы 2, 3 или один металлический лист, закрепленньй по крайней мере на одной поверхности изолируняцей плиты, и дополнительный изолирующий слой 4, расположенный между наружным листом 2 ...

Passschiene als Leitmittel bei parallelen Trennschnitten

AUTOMATISCHES URWALDSAEGEWERK

KETTENSAEGE

Riving knife

A riving knife (1) is mounted externally of a circular saw machine such that a curved leading edge of a blade (5) of the riving knife is close to and generally conforms to the arc described by the rim of the saw blade. The blade (1) has a gantry part (8) extending from a mounting part (3) and arranged to be disposed above the level of a saw table (2) when the knife is mounted, a blade part (5) depends from said gantry part towards said table in the shape of a tapering finger. The position of the blade part (5) in the plane of rotation of the saw blade and with respect to said table can be manually adjusted to permit a curved leading edge of the blade part to be disposed proximate the arc described by the rim of the saw blade.

CIRCULAR SAW

Improvements in and relating to edge trimming and moulding machines for planks and laths

... 226,529. Naamlooze Vennootschap A. I. van den Bergh's Emballage Fabrieken, (Assignees of Brouwer, J.). Dec. 18, 1923, [Convention date]. Planing and moulding.- In an arrangement for trimming or moulding the edges of a plank immediately after it has been sawn off, the plank 5 after passing the usual riving knife 7 passes between fences 8, 9 and corresponding pressure members, comprising a spring mounted roller 14 and a flat spring 27. These members together with the fence 9 are mounted on a slide 10 vertically adjustable by means of a screw 17. The slide also carries spring-mounted pressure rollers 12, 13, and an edge trimming or moulding cutter 1. A similar cutter 22 is mounted below the plank in an adjustable slide 21 carrying supporting rollers 24. The main part of the timber travels outside the fences 8, 9 on ordinary bearing rollers (not shown).

CIRCULAR SAW FOR SAWING PLATES WITH STEPLESS ADJUSTMENT OF THE PLAY BETWEEN A CARRIAGE AND ITS GUIDE RAIL

BAUMFAELLKEIL

CIRCULAR SAW

TABLE SAW WITH FROE SYSTEM AND PROCEDURE FOR THE USE OF A TABLE SAW WITH FROE SYSTEM

TRANSVERSE SAW

TABLE SAW WITH A FROE

SÄGEMASCHINE UND VERFAHREN ZUM ZUSCHNEIDEN VON WERKSTÜCKEN MITTELS EINER SOLCHEN SÄGEMASCHINE

The machine has a machine table (1), and a sawing aggregate (3) movably guided along the machine table. A saw blade (5) of the sawing aggregate partially penetrates a gap, which extends along a guideway of the aggregate in the machine table in an operating position. A splitting wedge (7) is brought into the gap of the machine table to prevent jamming of saw bade at the work piece. The splitting wedge is movably guided over a section of the guide way of the sawing aggregate along a guidance (4). The splitting wedge is arranged at the saw carriage, which carries the aggregate. An independent claim is also included for a method for cutting a workpiece.

EINRICHTUNG ZUM ABTRENNEN VON STAMMABSCHNITTEN VON EINEM BAUMSTAMM

BAUMFÄLLKEIL

CONTROLLED TRANSVERSELY MOVABLE GUIDE MEANS FOR LUMBER

SLOT CUTTING APPARATUS

... 23 SLOT CUTTING APPARATUS A tube slotting apparatus (10) includes a base (12) upon which a polyvinyl chloride tube (86) is disposed. The tube (86) is mounted over a convex surface (71) to allow bowing thereof. A tensioning apparatus (52) presses the tube (86) against the convex surface such that the upper surface thereof is tensioned and the lower surface thereof is in compression: A plurality of saw blades (70) are mounted on a pivoting bracket (72) to provide cutting of the slots in the tube (86). Rotation of the saw blades (70) on to the tensioned surface of the polyvinyl chloride tube (86) results in the formation of slots. The saw blades (70) are rotated in the opposite direction to the cutting teeth and the portion of the polyvinyl chloride tube (86) disposed between the two saw blades during formation of the slots pulls away from the surface of the saw blades such that binding is prevented.

CIRCULAR SAW WITH RIVING KNIFE

Method for cutting spools of films made of plastic and device for implementing it

LAMBRIS ECONOMIQUE, PROCEDE ET DISPOSITIF DE FABRICATION DE CELUI-CI

LES LAMBRIS 101, QUI COMPORTENT UNE FACE DE PAREMENT 103, UNE FACE DE CONTREPAREMENT 104 ET QUI SONT ASSEMBLES PAR DES PROFILS A RAINURE 106 ET LANGUETTE 105 DE MANIERE QUE LEURS FACES DE PAREMENT 103 SOIENT PARALLELES A UNE PAROI 102, ONT UNE EPAISSEUR DIMINUANT, SOIT REGULIEREMENT, SOIT BRUSQUEMENT, DE LA RAINURE 106 A LA LANGUETTE 105, LA MATIERE AINSI GAGNEE ETANT PRISE SUR LA FACE DE CONTREPAREMENT. SELON LE CAS, ON LES FABRIQUE EN REFENDANT OBLIQUEMENT UNE PIECE DE BOIS EQUARRIE, OU EN LA SCIANT SUR UNE PROFONDEUR INFERIEURE A LA LARGEUR DE LA PIECE SELON DEUX COUPES PARALLELES A LA LARGEUR DE LA PIECE ET DECALEES DANS LE SENS DE L'EPAISSEUR. UN DISPOSITIF EST SPECIALEMENT CONCU POUR METTRE EN OEUVRE CE DERNIER PROCEDE.

A guard system for a power saw

Hand circular saw

A hand circular saw has a saw blade, a support plate, a rocker swivelling the saw blade on the support plate about a swivel axis, a splitting wedge carrier, a splitting wedge which is held on the splitting wedge carrier and a guide device swivelling the splitting wedge about an axis of the saw blade, the guide device being formed as a tension-transmitting drive.

SAW ACCESSORIES AND CLAMP FOR USE THEREWITH

In at least one form of the invention, a clamp can be used to attach a saw accessory to a saw. In various embodiments, the clamp can comprise first and second clamping members, an actuator, and a controller. In various embodiments, the saw accessory can be disposed between the first and second clamping members where at least one of the first and second clamping members can be moved by the actuator in order to clamp the saw accessory therebetween. In at least one such embodiment, the controller can be in electrical and/or fluid communication with the actuator to activate the actuator. In various embodiments, the controller can be activated by an operator from a location proximate to the operator but remote from a blade of the saw.

Manual severing machine

Hand-Trennmaschine (10, 110) mit einem auf einen Untergrund (U) auflegbaren Führungskörper (12) und einer Motorbaugruppe (20; 120), die einen Antriebsmotor (21) und eine durch den Antriebsmotor (21) antreibbare Werkzeugaufnahme (22) für ein Trenn-Werkzeug (23) umfasst, wobei die Werkzeugaufnahme (22) bezüglich des Führungskörpers (12) zwischen einer oberen Tiefeneinstellposition (TO) und einer unteren Tiefeneinstellposition (TU) beweglich gelagert ist, wobei die Hand-Trennmaschine (10, 110) ein Führungselement (50; 150) aufweist, das vor oder hinter dem Trenn-Werkzeug (23) positioniert ist, wobei das Führungselement (50; 150) um eine maximale Führungselement-Tiefe (68) vor die Unterseite (14) des Führungskörpers (12) vorsteht, die kleiner als eine Werkzeug-Tiefe (69) des Trenn-Werkzeugs (23) ist, mit der das Trenn-Werkzeug (23) in seiner untersten Tiefeneinstellposition (TU) vor die Unterseite (14) des Führungskörpers (12) vorsteht.

Saw table plate with riving knife that can be attached to same

Die Erfindung betrifft einen Sägetisch bzw. eine Arbeitsplatte (1) eines Sägetisches mit einer Befestigungsseite (2), an der eine Handkreissäge (5) befestigbar ist und mit einer Werkzeug-Durchtrittsöffnung (4) zum Durchtritt des Sägeblattes (6) der Handkreissäge (5) und gegebenenfalls eines an der Handkreissäge (5) befestigten Handkreissäge-Spaltkeils zu einer von der Befestigungsseite (2) beabstandeten Arbeitsseite (3), auf der ein Werkstück in einer Schnittrichtung (a) auf das Sägeblatt (6) verschiebbar ist. Zur Erhöhung der Arbeitssicherheit bei der Verwendung von Handkreissägen ohne Handkreissägen-Spaltkeil, wird eine in Schnittrichtung (a) hinter der Werkzeug-Durchtrittsöffnung (4) angeordnete Befestigungseinrichtung (10 bis 21) zur Befestigung eines einen Spaltkeil (8) ausbildenden Adapterstücks (7) vorgeschlagen, wobei das Adapterstück (7) einen Befestigungssteg (9) aufweist, mit dem es mit den zwischen Befestigungsseite (2) und Arbeitsseite (3) angeordneten Mitteln (10 bis 21) der ...

МОДУЛЬНАЯ ЗАЩИТНАЯ СИСТЕМА ДЛЯ МЕХАНИЧЕСКОЙ ПИЛЫ

Изобретение относится к механическим инструментам, в частности к механическим пилам со столом. Система содержит расщепляющий нож, выполненный с возможностью крепления на пиле сзади от полотна и имеющий верхнюю поверхность и заданную толщину. В первом варианте толщина расщепляющего ножа больше толщины полотна и меньше толщины пропила, выполняемого полотном. Во втором варианте толщина расщепляющего ножа приблизительно равна толщине полотна. Расщепляющий нож имеет по меньшей мере одно отверстие вблизи верхней поверхности, механизм защиты полотна и предотвращения отдачи, установленный с возможностью снятия на расщепляющем ноже. Указанный механизм имеет защищающую полотно часть и предотвращающую отдачу часть. Кроме того, указанный механизм дополнительно содержит крепежный элемент, защищающую полотно часть, предотвращающую отдачу часть и рычажный механизм. Рычажный механизм имеет подвижный осевой элемент для введения в отверстие в расщепляющем ноже. Указанный подвижный осевой элемент выполнен и установлен с возможностью осевого перемещения. В результате обеспечивается простота настраивания, установки и удаления элементов пилы. 2 н. и 14 з.п. ф-лы, 12 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 456 152 (13) C2 (51) МПК B27B 5/29 (2006.01) B23D 45/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009122573/02, 08.11.2007 (24) Дата начала отсчета срока действия патента: 08.11.2007 (43) Дата публикации заявки: 10.01.2011 Бюл. № 1 (73) Патентообладатель(и): РОБЕРТ БОШ ГМБХ (US) 2 4 5 6 1 5 2 (45) Опубликовано: 20.07.2012 Бюл. № 20 (56) Список документов, цитированных в отчете о поиске: US 2006042441 A1, 02.02.2006. SU 1382643 A1, 23.03.1988. SU 245684 A1, 01.01.1969. US 20060260456 A1, 23.11.2006. 2 4 5 6 1 5 2 R U (86) Заявка PCT: US 2007/023490 (08.11.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 29.06.2009 (87) Публикация заявки РСТ: WO 2008/066676 (05.06.2008) Адрес для ...

Circular saw used as hand-held/bench circular saw or circular cross-cut or miter-box saw, comprises splitting wedge removably arranged on housing outside fixed part of saw blade protective hood via manually operated clamping mechanism

Circular saw comprises a splitting wedge (12) and an oscillation protective hood (6). The splitting wedge is arranged on the housing (22) of the saw during operation of the saw independently of the pivot position of the oscillation protective hood. The splitting wedge is removably arranged on the housing outside a fixed part of the protective hood of the saw blade (8) via a manually and tool-free operated clamping mechanism (20). The oscillation protective hood has slits on its free ends only in a stop region (18). Preferred Features: The splitting wedge is clamped with a contact surface directly against a clamping surface (24) on the machine housing. The clamping mechanism consists of a tommy screw (32) or a tommy nut.

Modulare Schutzhaube für Motorsäge

Saw unit

WEDGE DEVICE TO CASES OF TREE

UNTERFLURSÄGEMASCHINE

SCHUTZHAUBE FÜR KREISSÄGEN

DEVICE FOR THE SEPARATION OR SLITTING STARING A CUT PROPERTY, IN PARTICULAR WOOD.

PORTABLE CIRCULAR SAW WITH FROE DRIVE MECHANISM

VERFAHREN ZUM WINKEL- UND MASSGENAUEN ABKUERZEN MEHRERER NEBENEINANDER ANGEORDNETER WERKSTUECKE

PROTECTION HOOD FOR CIRCULAR SAWS

MECHANISM FOR SEPARATING FROM MASTER SECTIONS FROM A TRUNK

UNTERFLURSÄGEMASCHINE

SÄGEEINRICHTUNG

Sägeeinrichtung mit einem Maschinentisch (1), welcher eine Auflageoberfläche (2) für zumindest ein zu zersägendes Werkstück (3) aufweist, und mit zumindest einem am Maschinentisch (1) entlang zumindest einer längserstreckten, insbesondere linear verlaufenden, Führungsbahn (4) verfahrbaren Sägeblatt (5), insbesondere Kreissägeblatt, zum Zersägen des Werkstücks (3) und mit zumindest einem motorischen Sägeblattfahrantrieb (6) zum Verfahren des Sägeblatts (5) entlang der Führungsbahn (4) und mit zumindest einem entlang der Führungsbahn (4) verfahrbaren Spaltkeil (7), wobei zusätzlich zum Sägeblattfahrantrieb (6) zumindest ein motorischer Spaltkeilfahrantrieb (8) vorgesehen ist, mit dem der Spaltkeil (7) entlang der Führungsbahn (4) verfahrbar ist.

Table saw guard assembly

AUXILIARY TOOL DEVICE

SLOT CUTTING APPARATUS

Adjustable and Removable Keel Assembly and Blade Guide for a Jigsaw

A method of positioning a shoe member and a keel assembly relative to a housing of a jigsaw is provided. The method may include securing the keel assembly to the housing so that the keel assembly extends from the housing beyond the shoe member. The housing and the keel assembly may be pivoted relative to the shoe member in a manner such that a position of the housing relative to the keel assembly remains unchanged. A portion of the keel assembly may be uncoupled from the housing.

Detection systems for power equipment

Methods to detect when a human body contacts a predetermined portion of a machine are disclosed. The methods distinguish contact with a person from contact with other materials. The methods are particularly applicable in woodworking equipment such as power saws to detect contact between a person and the blade of the saw. Woodworking machines and memory devices for use in woodworking machines having safety systems designed to detect a dangerous condition between a human and a dangerous portion of the woodworking machine and to trigger some action to mitigate the dangerous condition are also disclosed.

SAFETY DEVICES FOR SAWS

In various embodiments, a saw can include a work surface and a blade at least partially extending through the work surface. In at least one embodiment, the saw can further include a sensor and a light emitter, wherein the light emitter can be configured to emit a first light beam and a second light beam onto at least a portion of the work surface. In various embodiments, the sensor can be can be configured to detect a plurality of saw conditions and, owing to communication between the sensor and the light emitter, the light emitter can be configured to emit the first light beam onto the work surface when the sensor detects a first saw condition and emit the second light beam onto the work surface when the sensor detects a second saw condition. 1. A saw configured to motivate a blade and cut a workpiece , the saw comprising:a work surface, wherein the blade is configured to at least partially extend above said work surface;a light emitter, wherein said light emitter is configured to emit a first light beam and a second light beam; anda sensor, wherein said sensor is configured to detect a first saw condition and a second saw condition, wherein said light emitter is in communication with said sensor, wherein said light emitter is configured to emit the first light beam onto one of said work surface and the workpiece when said sensor detects the first saw condition, and wherein said light emitter is configured to emit the second light beam onto one of said work surface and the workpiece when said sensor detects the second saw condition.2. The saw of claim 1 , wherein the first light beam comprises a first color claim 1 , wherein the second light beam comprises a second color claim 1 , and wherein the first color is different than the second color.3. The saw of claim 1 , wherein the first light beam comprises a color having a first intensity claim 1 , wherein the second light beam comprises said color having a second intensity claim 1 , and wherein said first intensity ...

GUARD, RIVING KNIFE, AND ANTI-KICKBACK PAWL ASSEMBLY

In various embodiments, a saw accessory assembly can be configured to be attached to a saw. In at least one embodiment, the assembly can include a first component and a second component, wherein at least one of the first and second components can include a visual guide configured to assist an operator in assembling the first and second components. In other various embodiments, at least one of the first and second components can include a visual guide configured to assist the operator in adjusting the first and second components in a predetermined sequence. 1. A saw accessory assembly configured to be attached to a saw , the saw accessory assembly comprising:a first component including one of a riving knife, a throat plate, a blade guard, an anti-kickback pawl, and a connection member; anda second component including one of a riving knife, a throat plate, a blade guard, an anti-kickback pawl, and a connection member, wherein said first component includes a first visual guide configured to assist an operator in assembling said first component to said second component.2. The saw accessory assembly of claim 1 , wherein said second component further comprises a second visual guide configured to assist the operator in assembling said first component to said second component.3. The saw accessory assembly of claim 2 , wherein said first visual guide includes a first color claim 2 , wherein said second visual guide includes a second color claim 2 , and wherein said first color is different than said second color.4. The saw accessory assembly of claim 2 , wherein said first visual guide includes a first color claim 2 , wherein said second visual guide includes said first color claim 2 , and wherein said first color of said first and second visual guides is configured to assist the operator in assembling said first component to said second component.5. The saw accessory assembly of claim 4 , wherein said first color of said first visual guide includes a first shade of said ...

Optical Alignment Device for a Table Saw

A table saw includes a workpiece support surface and a laser apparatus. The workpiece support surface defines a blade opening through which a cutting blade is configured to extend. The laser apparatus is configured to emit a laser light away from the workpiece support surface. 1. A table saw comprising:a workpiece support surface defining a blade opening through which a cutting blade is configured to extend; anda laser apparatus configured to emit a laser light away from the workpiece support surface.2. The table saw of claim 1 , further comprising:a reflective surface operably positioned to reflect the laser light toward the workpiece support surface.3. The table saw of wherein the reflective surface reflects the laser light onto the workpiece support surface in a position based on a cutting path of the cutting blade.4. The table saw of claim 2 , further comprising:a riving knife having an upper knife portion positioned above the workpiece support surface and a lower knife portion positioned below the workpiece support surface; anda blade guard connected to the upper knife portion of the riving knife,wherein (i) the laser apparatus is connected to the lower knife portion, and (ii) the reflective surface is connected to one of the upper knife portion and the blade guard.5. The table saw of claim 2 , wherein the laser apparatus emits the laser light through a laser opening in the workpiece support surface.6. The table saw of wherein:the cutting blade is configured to rotate about a rotational axis, andthe laser apparatus is configured to rotate about the rotational axis.7. Table saw of claim 6 , further comprising:a reflective surface operably positioned to reflect the laser light toward the workpiece support surface.8. A table saw comprising:a workpiece support surface defining a blade opening through which a cutting blade is configured to extend;a light apparatus configured to emit a beam of light; anda reflective surface operably positioned to reflect the beam of ...

Blade Guard Having a Safety Feature

A safety system is provided for a power tool having a motor-driven cutting blade, a safety mechanism operable by a controller to stop and/or move the cutting blade and a blade guard. The safety system includes an electrically active surface provided on the blade guard that is configured to change an electrical characteristic in response to contact between the body of an operator and the active surface. An active surface controller is operable to provide electrical power to the electrically active surface, to generate a signal in response to the change in the electrical characteristic, the signal indicative of an unsafe condition, and to transmit the signal to the controller for the safety mechanism. 1. A safety system for a power tool having a cutting blade driven by a drive motor assembly supported on a base , a safety mechanism operable by a controller to stop and/or move the cutting blade in response to a signal indicative of an unsafe condition , and a blade guard supported on the base in relation to the cutting blade , said safety system comprising:an electrically active surface provided on the blade guard, the electrically active surface configured to change an electrical characteristic of said active surface in response to contact between the body of an operator and said active surface; andan active surface controller operable to provide electrical power to said electrically active surface, to generate a signal in response to said change in said electrical characteristic, said signal indicative of an unsafe condition and to transmit said signal to the controller for the safety mechanism.2. The safety system of claim 1 , wherein:said electrically active surface is a capacitive surface in which the electrical characteristic is a capacitance of said active surface; andsaid active surface controller is operable to monitor said capacitance of said active surface and to generate said signal in response to a change in said capacitance.3. The safety system of claim 1 ...

TABLE SAWS WITH SAFETY SYSTEMS AND SYSTEMS TO MOUNT AND INDEX ATTACHMENTS

Table saws and table saws designed to implement safety systems that detect contact between a person and a dangerous portion of the saw are disclosed. Table saw components, mounting systems for table saws, and table saw attachments are also disclosed. One embodiment may include a first clamp surface, a second clamp surface spaced apart from the first clamp surface so that a base portion of a riving knife or splitter can be placed between the clamp surfaces with the opposing sides of the base portion generally parallel to the first and second clamp surfaces. 1. A table saw comprising:a table defining a work surface, where the table includes an opening;a generally planar, circular blade configured to extend at least partially above the work surface through the opening;a motor to drive the blade;a riving knife or splitter having a base portion with opposing sides;an elevation carriage supporting the blade and configured to move to change the elevation of the blade relative to the work surface with the blade at a specific angular orientation relative to the work surface; anda mounting system configured to hold the riving knife or splitter adjacent the blade with the opposing sides of the base portion substantially parallel to the plane of the blade;where the mounting system is supported to move with the elevation carriage;where the mounting system includes a clamping structure;where the clamping structure includes a first clamp surface and a second clamp surface, where the clamping structure is configured to accommodate the base portion between the first and second clamp surfaces with the opposing sides of the base portion generally adjacent the first and second clamp surfaces, respectively, where the clamping structure further includes a handle adapted to pivot around an axis below the work surface between a first position where the clamping structure does not clamp the base portion and a second position where the clamping structure clamps the base portion, and where ...

Table Saw Riving Knife Mounting Arrangement

A riving knife mounting assembly is provided that rigidly and accurately positions the riving knife relative to the cutting blade by way of a simple and intuitive mechanism. Interaction between a clamping plate and a locking plate engage opposite sides of the riving knife to hold the riving knife in place, and provides a sensible indication that the two components are properly mated. A cam lever assembly allows loosening or tightening the clamping plate and locking plate together about the riving knife by simply rotation of the lever. A spring assembly maintains pressure on the riving knife even in the loosened position to maintain proper positioning of the components. The clamping plate is part of a mounting bracket that is mounted to a motor arm movable with the drive assembly, and includes adjustment screws for adjusting the orientation of the riving knife relative to the cutting blade in multiple degrees of freedom. 1. A mounting assembly for mounting a riving knife of a table saw to a motor arm of the table saw , the riving knife having an arcuate slot extending along the length of the riving knife that allows adjustment of the angular position of the riving knife relative to a saw blade and to the workpiece being cut by the blade , the mounting assembly comprising:a mounting bracket mountable to the motor arm of the table saw, the mounting bracket including a clamping plate defining a clamping surface facing the riving knife;a locking plate defining a locking surface facing the riving knife and the clamping plate;a tab and recess arrangement defined between the mounting bracket and the locking plate, the tab sized to extend through the arcuate slot of the riving knife and the recess sized to receive the tab when the tab extends through the arcuate slot; and an elongated locking shaft extending through shaft openings in the mounting bracket and the locking plate, the locking shaft configured to extend through the arcuate slot in the riving knife;', 'one end of ...

Woodworking Table Saw with Vacuuming Function

The present invention disclosed a woodworking table saw with self vacuuming function, comprising: a worktable and a saw blade, the worktable being provided with a saw slot through which the saw blade is extended, a blade guard being disposed on the saw slot, a riving knife being disposed adjacent to a side of the saw blade, and a riving knife holder being provided for holding the riving knife, wherein the woodworking table saw further has a closed box, an eccentric motor, a vacuuming air box and a dust bag, the closed box is hung beneath the worktable by lugs disposed under two sides of the worktable, the eccentric motor is fixed at a side of the closed box, the eccentric motor is provided with an eccentric shaft which has one end coupling to the saw blade and the other end coupling to a central shaft of the vacuuming air box via a belt, a fan blade is fixed on the central shaft, an air inlet of the vacuuming air box is in communication with a dust outlet of the closed box and an air outlet of the vacuuming air box is in communication with the dust bag. The woodworking table saw with self vacuuming function of the present invention, wherein the vacuuming air box and a saw blade are synchronously turned on and turned off, so that it is able to achieve the purpose of collecting the sawdust and dust produced during working, and maintaining the sawdust and dust within a closed environment to keep them from leaking and causing pollution. The woodworking table saw with a self vacuuming function of the present invention is with a compact structure to only require a small space and is with high portability. 1. A woodworking table saw with self vacuuming function , comprising: a worktable and a saw blade , the worktable being provided with a saw slot through which the saw blade is extended , a blade guard being disposed on the saw slot , a riving knife being disposed adjacent to a side of the saw blade , and a riving knife holder being provided for holding the riving knife , ...

Compound Saw

A compound saw includes a base, a housing, a transmission component and a table, the rear end of the table is rotatably connected to the housing, and is engaged with the cutter head through the transmission component, so as to expose the cutter head out of the first cutting slit or out of the second cutting slit when the front end of the table swings upward and downward. The cutter head of the compound saw can be switched between the bench cutting mode and the miter cutting mode. Accordingly, on one hand, the structure for switching between modes is simple and does not require the cooperation of too many parts; on the other hand, the switchover can be realized simply by manually operating the movable bench, without too many operations.

TABLE SAW GUARD

A table saw guard assembly for guarding a blade on a table saw is provided. The table saw guard assembly includes a support structure and a hood assembly including at least one of a front curtain, first side curtain, second side curtain and top curtain, wherein each of said curtains are independently moveable and/or removable from the hood assembly. Furthermore, a table saw guard assembly is provided including a quick release mechanism for connecting the hood assembly to the support structure. 1. A table saw guard assembly for guarding a blade on a table saw , said guard assembly comprising:a support structure; anda hood assembly connected to said support structure including a first side curtain and a second side curtain, wherein each of said first and second side curtains are independently removable from said hood assembly, wherein said hood assembly further includes a first quick release mechanism for selectively removing said first and second side curtains from said hood assembly.2. The guard assembly of claim 1 , wherein said support structure includes a riving knife.3. The guard assembly of claim 1 , wherein said first quick release mechanism includes a spring biased pull pin.4. The guard assembly of claim 3 , wherein said hood assembly includes a second quick release mechanism for selectively removing said hood assembly from said support structure.5. The guard assembly of claim 4 , wherein said second quick release mechanism includes a fixed tab and a push tab pivotally connected to a pivot pin claim 4 , wherein said push tab includes a lock pin and said support structure includes an aperture for receiving said lock pin.6. The guard assembly of claim 3 , wherein said second quick release mechanism includes a lock member and a spring biased hinge for biasing said lock member against said support structure.7. A table saw guard assembly for guarding a blade on a table saw claim 3 , said guard assembly comprising:a support structure; anda hood assembly connected ...

Blade Guard Having a Safety Feature

A safety system is provided for a power tool having a motor-driven cutting blade, a safety mechanism operable by a controller to stop and/or move the cutting blade and a blade guard. The safety system includes an electrically active surface provided on the blade guard that is configured to change an electrical characteristic in response to contact between the body of an operator and the active surface. An active surface controller is operable to provide electrical power to the electrically active surface, to generate a signal in response to the change in the electrical characteristic, the signal indicative of an unsafe condition, and to transmit the signal to the controller for the safety mechanism.

Power equipment with quick release anti-kickback device

A power equipment in one embodiment includes a riving knife with a circular mounting hole opening to an outer surface of the riving knife through a throat, the throat having a minimum diameter that is less than a minimum diameter of the mounting hole, and an anti-kickback assembly including a generally cylindrical grooved shaft having a first diameter larger than a minimum diameter of the throat and a second diameter smaller than the minimum diameter of the throat, and an actuating arm operably connected to the grooved shaft and configured to rotate the grooved shaft from a first position whereat the second diameter is aligned with the throat and a second position whereat the second diameter is not aligned with the throat.

SYSTEMS TO MOUNT AND INDEX RIVING KNIVES AND SPREADERS IN TABLE SAWS

Mounting systems to secure and index riving knives and spreaders in table saws are disclosed. One embodiment may include three mounts or screws attached to an elevation carriage. A clamp plate fits over the heads of the mounts and a handle pivots to move the clamp plate against flanges on the heads of the mounts to clamp a riving knife or spreader in place. 1. A table saw comprising:a table defining a work surface;a substantially planar, circular blade configured to extend at least partially above the work surface;a motor to spin the blade;an elevation system configured to change the elevation of the blade relative to the work surface, where the elevation system includes an elevation carriage;a riving knife or spreader; anda clamp system supported by the elevation carriage, where the clamp system is configured to hold the riving knife or spreader adjacent the blade, where the clamp system includes a plurality of mounts, each mount having a head portion that includes a clamping surface against which the riving knife or spreader is clamped by the clamp system and a threaded portion adapted to screw into a socket associated with the elevation carriage, and where the position of the riving knife or spreader relative to the blade when clamped in the clamp system can be adjusted by turning one or more of the mounts to reposition one or more of the clamping surfaces.2. The table saw of claim 2 , where at least one mount includes a surface other than the clamping surface to contact and support the riving knife or spreader.3. The table saw of claim 2 , where the riving knife or spreader includes an opening claim 2 , and where at least one mount includes a shoulder configured to mesh with the opening in the riving knife or spreader to prevent the riving knife or spreader from moving up in the clamp system.4. The table saw of claim 3 , where the shoulder is an annular shoulder.5. The table saw of claim 1 , where the plurality of mounts comprises three mounts.6. The table saw ...

Apparatus For Fixing Knife Plate Of Saw Machine

An apparatus for fixing a saw blade and a knife plate of a saw grinding machine includes a driving device including an axis; and a fixture plate having a first end and a second end. The fixture plate includes a connective hole coupled to the driving device, and a coupled portion defined at the first end thereof. The saw blade is pivotally connected to the axis of the driving device, with the saw blade and the fixture plate moved with respect to the driving device simultaneously. The knife plate is coupled to the coupled portion of the fixture plate and includes a blocked side formed on a side thereof, with a vertical distance between the blocked side and the saw blade maintained to be fixed. 1. A saw comprising:a driving device including a base member coupled to a platform and including an adjustment slot, an adjusting block having a pivotal portion pivotally connected to the base member, and a connective base opposite to the pivotal portion, and a driving element including a drive shaft extending therefrom and inserted through and pivotally connected to the connective base;a fixture plate having a first end and a second end, with the fixture plate including a connective hole coupled to the driving device, and a coupled portion located at the first end thereof;a saw blade pivotally connected to the drive shaft, with the saw blade and the fixture plate moved with respect to the driving device simultaneously; anda knife plate coupled to the coupled portion and including a blocked side formed on a side thereof, and with a vertical distance between the blocked side and the saw blade maintained to be fixed.2. The saw as claimed in claim 1 , with the base member including a lift/lower trough corresponding to the connective base claim 1 , and a pivot connected to the pivotal portion.3. The saw as claimed in claim 2 , with the connective hole is mounted on a side of the connective base claim 2 , with the fixture plate including a mounted ring provided between the connective ...

Table Saw Guard

A table saw guard assembly for guarding a blade on a table saw is provided. The table saw guard assembly includes a support structure and a hood assembly including at least one of a front curtain, first side curtain, second side curtain and top curtain, wherein each of said curtains are independently moveable and/or removable from the hood assembly. Furthermore, a table saw guard assembly is provided including a quick release mechanism for connecting the hood assembly to the support structure. 1. A table saw guard assembly for guarding a blade on a table saw , said guard assembly comprising:a support structure; anda hood assembly mounted to said support structure including a first side curtain and a second side curtain, wherein each of said first and second side curtains are independently movable relative to said support structure, wherein said first and second side curtains include an aperture for providing a sight line therethrough.2. The guard assembly of claim 1 , wherein said support structure includes a riving knife.3. The guard assembly of claim 1 , wherein said hood assembly further includes a quick-release mechanism for selectively engaging said support structure.4. The guard assembly of claim 3 , wherein said quick-release mechanism includes a fixed tab and a push tab pivotally connected to a pivot pin claim 3 , wherein said push tab includes a lock pin and said support structure includes an aperture for receiving said lock pin.5. The guard assembly of claim 1 , wherein said hood assembly further includes a locking mechanism adapted to selectively engage and secure said at least one of said first and second side curtains.6. The guard assembly of claim 5 , wherein said locking assembly includes a screw and a wing nut.7. The guard assembly of claim 1 , wherein said first and second side curtains independently move in response to a force applied by a workpiece.8. The guard assembly of claim 5 , wherein said first and second side curtains are moveable in ...

Detachable Protective Device for a Table Saw

A detachable protective device for a table saw includes a cutter board having first and second recesses. The second recess includes a receiving portion having a first width and a neck having a second width smaller than the first width. A base is mounted to the cutter board and includes first and second holes. A pivot is mounted in the first hole and is releasably engaged with the first recess. A locking member includes a pivotal portion pivotably received in the second hole. The pivotal portion has a maximal width larger than the second width and not larger than the first width and has a minimal width not larger than the second width. The pivotal portion is retained in the second recess when the locking member is in the locking position. The pivotal portion can disengage from the second recess when the locking member is in the release position.

Table saw

A table saw includes a base, a work table having a cutting opening, a tank for receiving cooling liquid, a blade partly extending out from the cutting opening, and a guard assembly. The guard assembly includes a guard for covering the blade and for moving upwards under the action of a workpiece. In a working condition, at least a portion of the guard abuts against the workpiece, and the workpiece can slide relative to the guard. The guard has a guiding wall which abuts against the workpiece in the working condition and which guides the cooling liquid into a kerf in the workpiece formed by the blade. Because the table saw collects the cooling liquid brought by the blade and returns it to the tank for receiving the cooling liquid through the cutting opening of the work table, the table saw effectively controls the cooling liquid splashed during the cutting operation of the workpiece and prevents the cooling liquid from splashing to dirty the operator, the work table, and the workpiece, saves the time of cleaning the workpiece after cutting, and enhances the operating comfort of the operator.

Table saws with safety systems and systems to mount and index attachments

Table saws and table saws designed to implement safety systems that detect contact between a person and a dangerous portion of the saw are disclosed. Table saw components, mounting systems for table saws, and table saw attachments are also disclosed. One embodiment may include a first clamp surface, a second clamp surface spaced apart from the first clamp surface so that a base portion of a riving knife or splitter can be placed between the clamp surfaces with the opposing sides of the base portion generally parallel to the first and second clamp surfaces.

TABLE SAW

A table saw including a table having a top surface, an opening in the table through which a saw blade extends, and a throat plate receivable within the opening. The throat plate includes a front end that sits flush with the top surface of the table, a back end that sits flush with the top surface of the table, a top surface that is co-planar with the top surface of the table, and a wear plate pocket that is recessed from the top surface of the throat plate. The wear plate pocket defines a bottom surface that is oriented at an oblique angle relative to the top surface of the throat plate and slopes downward in a direction from the back end toward the front end. The wear plate positioned within the wear plate pocket. The wear plate sitting parallel to the bottom surface of the wear plate pocket. 1. A table saw comprising:a table having a top surface;an opening in the table through which a saw blade extends; a front end that sits flush with the top surface of the table,', 'a back end that sits flush with the top surface of the table, the back end is opposite the front end,', 'a top surface that is co-planar with the top surface of the table, and', 'a wear plate pocket that is recessed from the top surface of the throat plate,', 'wherein the wear plate pocket defines a bottom surface that is oriented at an oblique angle relative to the top surface of the throat plate and slopes downward in a direction from the back end toward the front end; and, 'a throat plate receivable within the opening, the throat plate including'}a wear plate positioned within the wear plate pocket, the wear plate sitting parallel to the bottom surface of the wear plate pocket.2. The table saw of claim 1 , further comprising:a riving knife positioned behind the saw blade and extending upward from underneath the table; andan anti-kickback pawl supported by the riving knife and positioned above both the throat plate and the wear plate.3. The table saw of claim 1 , wherein the wear plate is made from ...

TABLE SAW GUARD

A table saw guard assembly for guarding a blade on a table saw is provided. The table saw guard assembly includes a support structure and a hood assembly including at least one of a front curtain, first side curtain, second side curtain and top curtain, wherein each of said curtains are independently moveable and/or removable from the hood assembly. Furthermore, a table saw guard assembly is provided including a quick release mechanism for connecting the hood assembly to the support structure. 1. A table saw guard assembly for guarding the blade on a table saw , said guard assembly comprising:a hood assembly; anda support structure including a telescoping boom and a base structure, wherein said telescoping boom is adapted to support said hood assembly above the blade and said base structure is attached to the table saw;said telescoping boom adapted to selectively position said hood assembly relative to the table saw.2. The guard assembly of claim 1 , wherein said base structure includes at least one adjustable telescoping arm.3. The guard assembly of claim 1 , wherein said base structure includes a rotational mechanism for rotating said base structure relative to the table saw.4. The guard assembly of claim 3 , wherein said rotational mechanism includes a wing nut for locking said base structure in a position.5. The guard assembly of claim 1 , wherein said hood assembly includes a mounting assembly for mounting said hood assembly to said telescoping boom.6. The guard assembly of claim 5 , wherein said mounting assembly includes a rotational coupling and a set screw.7. The guard assembly of claim 1 , wherein said telescoping arm includes a set screw for securing said telescoping arm in a position. This application is a divisional of U.S. patent application Ser. No. 15/373,086, filed Dec. 8, 2016, which is a divisional of U.S. patent application Ser. No. 14/242,372, filed Apr. 1, 2014 (now U.S. Pat. No. 9,573,292), which is a divisional of U.S. patent application Ser. ...

Table saw having a blade height adjustment mechanism

A table saw includes a height adjustment wheel including a threaded shaft; a blade suspension mechanism secured to a lock crank; a rod secured to both the blade suspension mechanism and a bottom of the cutting surface; an electric motor including a driving shaft and a link extending forward to secure to the blade suspension mechanism; a circular saw blade operatively connected to the driving shaft; first and second mounting plates each secured to the link and including a slanted slot element; and an interconnection including two end holes moveably disposed in the slot elements of the first and second mounting plates respectively, and an intermediate threaded hole secured to the threaded shaft. A rotation of the height adjustment wheel moves the saw blade up or down.

Table saws

Table saws are disclosed. The table saws can include a blade, an arbor, an arbor block, an elevation carriage, and a latch that connects the arbor block and the elevation carriage. The arbor block can have a first position in which the latch connects the arbor block and the elevation carriage, and a second position in which the latch does not connect the arbor block and the elevation carriage. The arbor block can pivot from the first position to the second position upon the occurrence of a retraction force. The table saw can include an actuator to cause the occurrence of the retraction force, and detection electronics to detect contact between the blade and a person. Woodworking machines with detection and reaction systems are also disclosed. A reaction system can include an explosive that causes retraction of a cutting tool.

Table saws having integrated control systems

A table saw has a table, a motor disposed under the table, a carriage connected to the motor, a saw blade supported by the carriage and driven by the motor, a riving knife connectable to the carriage adjacent to the saw blade, and a control circuit for determining when the riving knife is connected to the carriage, the control circuit receiving input from a switch which is engaged when the riving knife is disposed on the carriage. A switch contactor disposed on the carriage may contact the switch when the riving knife contacts the switch contactor.

TABLE SAW

Elevation and blade tilt mechanisms for table saws are disclosed. The elevation and tilt mechanisms may include an indexable position adjustment system configured to adjust the position of the blade relative to the table in discrete increments. Such table saws may also include a trunnion assembly with an elevation carriage slideably mounted to front and rear brackets, the brackets being tiltable with the elevation carriage relative to the table, and the elevation carriage being adapted to maintain the tilt of each bracket relative to the other bracket in a fixed orientation. 1. A table saw comprising:a table;a trunnion assembly disposed beneath the table and operatively coupled thereto, where the trunnion assembly supports a blade; andan indexable position adjustment system configured to adjust the position of the blade relative to the table in discrete increments.2. The saw of claim 1 , where the position of the blade includes the tilt of the blade relative to the table.3. The saw of claim 1 , where the position of the blade includes the elevation of the blade relative to the table.4. The saw of claim 3 , where the position of the blade includes the tilt of the blade relative to the table.5. The table saw of wherein the trunnion assembly includes an elevation carriage slideably mounted to front and rear brackets claim 1 , the brackets being tiltable with the elevation carriage relative to the table and where the elevation carriage is adapted to maintain the tilt of each bracket relative to the other bracket in a fixed orientation. This application claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 62/169,386, filed Jun. 1, 2015, which is incorporated herein by reference.The present disclosure relates to power tools and particularly to power tools with tool positioning mechanisms.Power tools often include some type of elevation mechanism to adjust the height or position of a cutter. In a table saw, for example, an elevation ...

BLADE GUARD FOR A TABLE SAW

Blade guards for table saws are disclosed. The blade guards can be used in a configuration where the guard holds a work piece against a work surface. This may be thought of as blade guards with hold-down capability. The blade guards also include splitters and anti-kickback assemblies. The anti-kickback assemblies include anti-kickback pawls that can be in an operable configuration or a disabled configuration. 1. A blade guard for use with a table saw , the blade guard comprising:a splitter or riving knife; andan anti-kickback pawl assembly attached to the splitter or riving knife;where the anti-kickback pawl assembly includes a plurality of anti-kickback pawls adapted to contact a workpiece when the anti-kickback pawls are in an operable configuration, and further including a spring configured to hold the anti-kickback pawls in a disabled configuration where the anti-kickback pawls do not contact a workpiece.2. The blade guard of claim 1 , where the anti-kickback pawls are adapted to pivot claim 1 , and where pivoting the anti-kickback pawls a certain amount causes the spring to hold the anti-kickback pawls up.3. The blade guard of claim 1 , where the spring is configured to bias the anti-kickback pawls toward a workpiece when the anti-kickback pawls are in the operable configuration claim 1 , and where the spring is configured to hold the anti-kickback pawls away from the workpiece when the anti-kickback pawls are in the disabled condition.4. The blade guard of claim 1 , where the spring provides a force to hold the anti-kickback pawl assembly to the splitter or riving knife claim 1 , and where a user can detach the anti-kickback pawl assembly from the splitter or riving knife by hand without the use of tools.5. A method of detaching a safety element from a splitter or riving knife mounted on a table saw claim 1 , where the splitter or riving knife includes at least one notch used to hold the safety element to the splitter or riving knife claim 1 , and where the ...

TABLE SAW

A table saw includes a table, a saw unit movably coupled underneath the table, a riving knife extending through the table, and a quick-release assembly selectively coupling the riving knife to the table. The quick-release assembly includes a mounting plate coupled to the table and a clamping plate movable relative to the mounting plate between a clamping position, in which the riving knife is clamped between the mounting plate and the clamping plate to secure the riving knife to the table, and a release position, in which the riving knife is releasable from the table. The quick-release assembly further includes a pin coupled for movement with the clamping plate and a handle pivotably coupled to the pin. The pin has a cam portion engageable with the saw unit. The clamping plate is movable between the clamping positon and the release position in response to pivoting movement of the handle. 1. A table saw comprising:a table;a saw unit movably coupled underneath the table;a riving knife extending through an opening in the table and aligned with a saw blade extending through the opening; and a mounting plate coupled to the table,', 'a clamping plate that is movable relative to the mounting plate between a clamping position, in which the riving knife can be clamped between the mounting plate and the clamping plate to secure the riving knife to the table, and a release position, in which the riving knife is releasable from the table,', 'a pin having a first end coupled for movement with the clamping plate, and', 'a handle pivotably coupled to a second end of the pin and including a cam portion engageable with the saw unit, wherein the clamping plate is movable between the clamping position and the release position in response to pivoting movement of the handle., 'a quick-release assembly selectively coupling the riving knife to the table, the quick-release assembly including'}2. The table saw of claim 1 , further comprising parallel fasteners anchored to the mounting plate ...

TABLE SAWS WITH SAFETY SYSTEMS AND SYSTEMS TO MOUNT AND INDEX ATTACHMENTS

Table saws and table saws designed to implement safety systems that detect contact between a person and a dangerous portion of the saw are disclosed. Table saw components, mounting systems for table saws, and table saw attachments are also disclosed. One embodiment may include a first clamp surface, a second clamp surface spaced apart from the first clamp surface so that a base portion of a riving knife or splitter can be placed between the clamp surfaces with the opposing sides of the base portion generally parallel to the first and second clamp surfaces.

TABLE SAW

A table saw including a table, an opening in the table through which a saw blade extends, and a throat plate receivable within the opening. The throat plate includes a top surface that is co-planar with a top surface of the table. The table saw further includes an anti-kickback pawl disposed above the throat plate and a wear plate coupled to the throat plate in facing relationship with the anti-kickback pawl, where at least a portion of the wear plate is sub-flush with the top surface of the throat plate. 1. A table saw comprising:a table;an opening in the table through which a saw blade extends;a throat plate receivable within the opening, the throat plate including a top surface that is co-planar with a top surface of the table;an anti-kickback pawl disposed above the throat plate; anda wear plate coupled to the throat plate in facing relationship with the anti-kickback pawl, wherein at least a portion of the wear plate is sub-flush with the top surface of the throat plate.2. The table saw of claim 1 , further comprising a riving knife positioned behind the saw blade and extending upward from underneath the table to support the anti-kickback pawl above the wear plate.3. The table saw of claim 1 , wherein the wear plate comprises metal.4. The table saw of claim 1 , wherein the anti-kickback pawl is biased into contact with the wear plate.5. The table saw of claim 1 , wherein the throat plate further includes a front end and an opposite back end claim 1 , wherein the wear plate is disposed proximate the back end.6. The table saw of claim 5 , wherein the throat plate further includes a knob that is disposed proximate the front end to which a locking arm is coupled for co-rotation therewith claim 5 , and wherein the knob is rotatable by a user to move the locking arm between a locking position in which the throat plate is secured to the table claim 5 , and a release position in which the throat plate is removable from the table.7. The table saw of claim 6 , wherein ...

TABLE SAW

A table saw includes a table, a saw unit movably coupled underneath the table, a riving knife extending through the table, and a quick-release assembly selectively coupling the riving knife to the table. The quick-release assembly includes a mounting plate coupled to the table and a clamping plate movable relative to the mounting plate between a clamping position, in which the riving knife is clamped between the mounting plate and the clamping plate to secure the riving knife to the table, and a release position, in which the riving knife is releasable from the table. The quick-release assembly further includes a pin coupled for movement with the clamping plate and a handle pivotably coupled to the pin. The pin has a cam portion engageable with the saw unit. The clamping plate is movable between the clamping position and the release position in response to pivoting movement of the handle. 1. A table saw comprising:a table;a spindle rotatably coupled to the table for driving a saw blade extending through an opening in the table;at least one flange plate coupled for co-rotation with the spindle for clamping the saw blade to the spindle;an actuator movable relative to the spindle between a release position, in which the actuator is disengaged from the spindle, and a lockout position, in which the actuator is engaged with the spindle or the flange plate to prevent rotation of the spindle to facilitate changing the saw blade; anda spring biasing the actuator toward the release position.2. The table saw of claim 1 , wherein the actuator is slidable relative to the spindle along an axis that is transverse relative to a longitudinal axis of the spindle.3. The table saw of claim 1 , wherein the actuator includes a protrusion on a first end thereof that is engageable with the spindle or flange plate when in the lockout position.4. The table saw of claim 3 , wherein the actuator includes a tab on a second end thereof that is user-manipulable to displace the actuator from the ...

Portable, motor-driven circular saw

A portable, motor-driven circular saw has a shoe (1), attached to the machine casing (7, 8) and intended to be placed on the workpiece, and a guiding handle (9, 10), provided above the shoe (1) and undisplaceable with respect to the drive motor (16, 20). The motor (16, 20) is supported fixedly with respect to the machine casing (7, 8). The saw blade (21) can be moved with respect to the machine casing (7, 8) by means of an actuating handle (40) connected to the support for the saw blade (21) between a raised rest position and a lowered working position, and in each of these positions a drive motor (16, 20) for transmission of the driving power is coupled to the saw blade (21). <IMAGE>

Patent DE3923470C2

鋸切機的護蓋快拆裝置及組拆方法

Process and device for separating or slitting a rigid material

A process and a device are used to separate or slit a rigid material (30), especially wood, with a modulus of elasticity of preferably approximately 50,000 to 400,000 kg/cm. A narrow tool having chip-removing elements (16), especially a circular saw blade (15), produces a kerf (36) of finite width in the material (30) at a cutting speed of more than approximately 40 m/s. After the chip-removing elements (16) have passed, a separator element (20) bends a side piece (33) out of the kerf plane (3-7) so that after the chip-removing elements (16) have passed, the side piece (33) is always at a distance from the tool. When viewed along the feed direction (31) of the material (30), the separator element (20) is provided, at a distance from its periphery (22), which is contiguous to the tool and is first to come into contact with the material (30) when the material (30) is fed in, with a hump (25). An imaginary connecting line (35a) runs between the hump (25) and the chip-removing elements (16) at a distance (40) above a first section (23) of the separator element (20) lying between hump (25) and periphery (22). (Figure 3).

The device for the directional felling of trees

Detection systems for power equipment

Methods to detect when a human body contacts a predetermined portion of a machine are disclosed. The methods distinguish contact with a person from contact with other materials. The methods are particularly applicable in woodworking equipment such as power saws to distinguish contact between a person and the blade of the saw from contact between the blade and wet or green wood. Woodworking machines and memory devices for use in woodworking machines having safety systems designed to detect a dangerous condition between a human and a dangerous portion of the woodworking machine and to trigger some action to mitigate the dangerous condition are also disclosed.

Method for cutting spools of films made of plastic and device for implementing it

Procédé de tronçonnage de bobines de films en matière thermoplastique constituées par un enroulement de spires sur un mandrin en carton ou en matière plastique rigide, caractérisé en ce que a) on met en contact, par tout moyen approprié, une bobine de film animée d'un mouvement de rotation de vitesse w1 avec au moins une fraise-scie métallique tournant à contre-sens avec une vitesse w2 supérieure à w1, ladite fraise-scie étant pourvue d'une denture ébaucheuse et finisseuse à coupes alternées b) on assure la pénétration de la fraise-scie dans la bobine par tout moyen exerçant une force sur cette dernière et/ou sur la fraise-scie, c) on procède au refroidissement et à la lubrification de l'aire de contact entre la bobine et la fraise-scie par tout moyen approprié. Appareillage pour la mise en oeuvre de ce procédé comportant une fraise-scie métallique, un moyen de refroidissement et de lubrification de l'aire de coupe et un moyen de mise en rotation de la bobine à contresens de la fraise-scie.

SAWING INSTRUMENT FOR USE AS A TABLE SAW OR MITER SAW

Felled tree cross cutting saw - has wedge unit following saw into cut and held to preserve cut width

L'invention concerne un dispositif de tronçonnage d'arbres abattus 2 à l'aide d'un élément de sciage allongé 4. Le dispositif est caractérisé en ce qu'il comprend un élément en forme de coin 6 qui suit l'élément de sciage 4 dans son mouvement de tronçonnage, qui a une épaisseur effective correspondant à la largeur de la saignée 13 et qui est arrêté après avoir pénétré dans la saignée afin de maintenir sa largeur pendant que l'élément de sciage termine le tronçonnage du tronc, l'élément de Sciage 4 et l'élément en forme de coin 6 étant ensuite ramenés dans la position initiale. Application aux chantiers d'abattage d'arbres.

ANTI-LOCKING DEVICE FOR CHAIN SAWS

CIRCULAR SAW

L'INVENTION CONCERNE UNE SCIE CIRCULAIRE. CETE SCIE CIRCULAIRE COMPORTANT UNE LAME DE SCIE TOURNANT DANS UN CARTER 10 ET UN COIN ECARTEUR 22 FIXE SUR CE CARTER ET FAISANT SAILLIE HORS DE CE DERNIER SUIVANT LA MEME DIRECTION DE LA LAME DE SCIE EN ETANT SITUE DANS LE MEME PLAN QUE CETTE DERNIERE COMPORTE UNE VIS DE SERRAGE 26 MONTEE DANS LE CARTER ET PARALLELE A L'AXE DE ROTATION DE LA LAME DE SCIE ET DONT L'EXTREMITE PEUT ETRE AMENEE EN PRISE AVEC LE COIN ECARTEUR 22, DANS UNE ZONE SITUEE ENTRE UNE SURFACE D'APPUI 25 DU COIN ECARTEUR 22 SUR LE CARTER 10 ET L'EXTREMITE LIBRE DU COIN ECARTEUR. APPLICATION NOTAMMENT AUX SCIES CIRCULAIRES A SYSTEMES D'ANTI-BLOCAGE DANS LA FENTE DE SCIAGE.

Patent FR2211176B1

Patent FR2211175A1

WORK PIECE CLAMPING DEVICE FOR METAL SAWING MACHINES

L'INVENTION CONCERNE UN DISPOSITIF DE SERRAGE DE LA PIECE A TRAVAILLER POUR DES MACHINES A SCIER LES METAUX. CE DISPOSITIF PERMETTANT DE SCIER UN BLOC 2 SUIVANT UN PLAN DE COUPE 7-7 AU MOYEN D'UNE LAME DE SCIE 5 COMPORTE DEUX MACHOIRES DE SERRAGE 3, 4 SITUEES DES DEUX COTES DU PLAN DE COUPE ET POUVANT ETRE SERREES CONTRE LE BLOC PERPENDICULAIREMENT A SA DIRECTION D'AVANCE A, ET DES SUPPORTS DE SERRAGE 11, 12 MOBILES DISPOSES SUR LE BATI 10 DE LA MACHINE DE L'AUTRE COTE DU BLOC 2 ET ACTIONNES PAR DES VERINS 17 POUR PRODUIRE UN COUPLE M D'OUVERTURE DE LA FENTE DE COUPE 28. APPLICATION NOTAMMENT AUX SCIES MECANIQUES A METAUX.

Patent FR2211176A1

Method and device for resawing or slotting rigid material, in particular wood

Abstract A method and a device serve for resawing or slotting rigid material, in particular wood, having a modulus of elasticity of, preferably, approximately 50,000 to 400,000 kg/cm2. A gap of finite width is cut into the material by a narrow tool comprising cutting elements, in particular a circular saw blade, at a cutting speed of over 40 m/s. After passage of the cutting element a timber section is always lifted off the rest of the material and bent out of the plane of the gap. In order to reduce the thermal loading of the tool, which is generated by the friction between the timber section and the tool, the timber section is always bent off in such a manner that once the timber section has left the cutting elements, it is spaced a certain distance from the circular saw blade (Fig. 1).

Table saws with safety systems

Table saws are disclosed. The table saws may include a circular blade, an elevation mechanism configured to raise and lower the blade relative to the work surface; and a spring to provide a force biasing the blade up or down relative to the work surface. The spring may be a gas spring connected between a trunnion and an elevation plate.

Circular saw with means for opening up the cut slit

A cutting tool arrangement for performing the process of opening up the slit cut in the workpiece by circular saws before the saw is retracted to facilitate removal of the saw. The workpiece being severed is moved perpendicular to the cutting plane as is the saw blade to accomplish the desired result.

Method and apparatus for separating or slitting rigid material, in particular wood

A method and apparatus to serve to separate or slit a rigid material (10a), in particular wood, having a modulus of elasticity of, preferably, about 50,000 to 400,000 kg/cm<2>. A narrow tool having tube-removing elements makes a gap (38a) of final width in the material (10a) at a cutting speed of more than 35 m/s. A profiled piece of wood (12a) is bent away from the remainder of the material (10a) out of the splitting plane (11a) immediately after the passage of the chip-removing elements. The profiled piece of wood (12a) is bent away to such an extent that the remaining material (10a) is brought out of engagement with the tool as soon as the chip removal has taken place. In order to render this method known from the main patent 3635318 and the device for carrying it out also usable for other sawing techniques, the tool is a saw band (2) of a band saw (Fig. 2). <IMAGE>

Table saw guard assembly

An improved riving knife/guard assembly (20) for a table saw (10) allows the guard to be removed and attached without the use of any tools, provides a clear view of the work zone, blade (16) and workpiece, and is easily adjustable to accommodate different size workpieces and cutting angle.

Table saw

A table saw includes a base, a work table having a cutting opening, a tank for receiving cooling liquid, a blade partly extending out from the cutting opening, and a guard assembly. The guard assembly includes a guard for covering the blade and for moving upwards under the action of a workpiece. In a working condition, at least a portion of the guard abuts against the workpiece, and the workpiece can slide relative to the guard. The guard has a guiding wall which abuts against the workpiece in the working condition and which guides the cooling liquid into a kerf in the workpiece formed by the blade. The table saw effectively controls the cooling liquid splashed during the cutting operation of the workpiece and prevents the cooling liquid from splashing to dirty the operator, the work table, and the workpiece.

Apparatus for keeping open the gap cut by a saw in a workpiece

A saw, especially a circular metal saw, is equipped with a device for keeping open the gap cut by the saw blade. For this purpose two chucking members are arranged symmetrically to the right and left of the saw blade on one side of the workpiece and an abutment member is arranged on the opposite side of the workpiece and opposite the saw blade. Power drive means press the chucking members against the workpiece. The workpiece engaging elements of the chucking members may be pointed ridges or conical tips.

System for separating chaff and remaining pieces from the desired clippings

Circular-saw wood-splitting-wedge height adjustment - with coupling concentric to saw blade axis and hinged to guide rocker arm

This is for use with a circular saw where the blade with drive motor is fitted to a height adjustable rocker arm, and where a splitting wedge is fitted on the side of the blade furthest from the operator as separating organ for the sawn units. The guide rocker arm for the coupling may form a parallelogram rod system with the blade rocker arm relative to their hinges. The wedge may also be transversely adjustable on the coupling. The blade rocker arm may be spring supported against the circular saw frame. The wedge height can easily adjusted with that of the blade, without changing its position relative to the latter or to the workpiece.

Power table saw with guard detection system

Anti-kerf bind device

The present invention comprises a pair of wheels mounted on a stub shaft, the outer surfaces of the wheels being bevelled to facilitate entering into a kerf. The wheels are mounted in a slot formed in the blade of a woodcutting implement which carries the cutting teeth.

Power equipment with quick release anti-kickback device

在一實施例中，一種動力設備包括：一劈刀，其具有一圓形安裝孔，該安裝孔經由一喉部向該劈刀之一外表面開放，該喉部具有一小於該安裝孔之一最小直徑的最小直徑；以及一反回踢總成，其包括一大體上圓柱形的有槽軸桿及一致動臂，該有槽軸桿具有一大於該喉部之一最小直徑的第一直徑及一小於該喉部之該最小直徑的第二直徑，該致動臂可操作地連接至該有槽軸桿且經構型來使該有槽軸桿自該第二直徑與該喉部對齊的一第一位置及該第二直徑不與該喉部對齊的一第二位置旋轉。

Patent PL91164B1

Splitter for circular table saw

A splitter for installation behind a rotating blade of a table saw to prevent contact between the kerf of a work piece and the upwardly moving rear portion of the saw blade. The splitter is indexed from the side of an actual kerf rather than from a side of the saw blade. In this manner, variations in kerf width resulting from variations in blade width and vibration of the saw blade are accommodated. Splitters having work piece contacting surfaces with incremental amounts of offset relative to the side of the kerf may be selected to provide a desired degree of interference and resulting force between the splitter and the work piece.

Sizing

Auxiliary tool device

An auxiliary tool device for power driven saw is provided which includes a tool holder carrying a rotatable spreader and pivotal anti-kickback pawls. The holder is mounted to one side of the saw cover and adjustably movable along an arc of a circle having a center at the axis of the saw blade to maintain the spreader and pawls spaced the same distance from the saw blade for each adjusted position thereof.

Tree trunk section cutting machine - has paired jaws movable away from cut in clamping setting to prevent jamming

Guard detection system for a power tool

A power table saw has a saw blade driven by a drive motor with power selectively supplied to the drive motor by actuation of a mains switch. A riving knife is provided that can be selectively positioned in an extended position and a retracted position relative to the blade. A blade guard is removably mounted to the riving knife in a position above the blade. A sensible element on the riving knife can be detected by a first sensor when the riving knife is retracted, the first sensor having a non-null state when the sensible element is adjacent the first sensor and a null state otherwise. A second sensor is configured to detect the presence of the blade guard and has a null state when the blade guard is detected and a non-null state otherwise. A controller is operable to determine the states of the first and second sensors and to disengage power to the drive motor when the mains switch is actuated when the states of the first and second sensors are different.

SELF-GUIDING DEVICE FOR A PORTABLE SAWING MACHINE.

Dispositif amovib1e d'autoguidage rectiligne pour machine à scier portative. L'invention concerne un dispositif amovible d'autoguidage permettant d'effectuer des coupes parfaitement droites. Il est constitué d'un guide (1) engagé verticalement dans le plateau (4) de la machine, maintenu par une goupille (3) traversant la cornière (2) et le guide. La progression de la coupe entraîne le guide dans la rainure engendrée par l'outil de coupe. Le dispositif selon l'invention est particulièrement destiné aux machines à scier portatives.

A riving knife mechanism for a power saw

Saw

Die Erfindung betrifft eine Unterflur-Zugsäge oder Tischkreissäge, mit einem Arbeitstisch, der eine Arbeitsfläche zur Auflage von zu bearbeitenden Werkstücken bereitstellt, einem Sägeblatt, das teilweise unter der Arbeitsfläche liegt und zumindest während des Sägebetriebs über die Arbeitsfläche hinaus nach oben vorsteht, einem unter der Arbeitsfläche angeordneten Antrieb für das Sägeblatt, der dazu ausgebildet ist, das Sägeblatt während des Sägebetriebs in Rotation zu versetzen, einem Träger, der unterhalb der Arbeitsfläche an einem Halter abgestützt ist und über die Arbeitsfläche hinaus nach oben vorsteht, und einer von dem Träger getragenen Schutzabdeckung, die dazu ausgebildet ist, in einer Schutzstellung vor einem Eingriff in das Sägeblatt zu schützen, wobei in die Schutzabdeckung zumindest eine elektrische oder elektronische Funktionseinheit integriert ist, wobei unterhalb der Arbeitsfläche eine Basiseinheit für die Funktionseinheit angeordnet ist, wobei die Funktionseinheit über eine Versorgungs- und/oder Kommunikationsstrecke mit der Basiseinheit verbunden ist, und wobei die Versorgungs- und/oder Kommunikationsstrecke ein elektrisches Leitungssystem umfasst, das in den Träger integriert ist.

Advanced circular saws

Guard detection system for a power tool

A power table saw has a saw blade driven by a drive motor with power selectively supplied to the drive motor by actuation of a mains switch. A riving knife is provided that can be selectively positioned in an extended position and a retracted position relative to the blade. A blade guard is removably mounted to the riving knife in a position above the blade. A sensible element on the riving knife can be detected by a first sensor when the riving knife is retracted, the first sensor having a non-null state when the sensible element is adjacent the first sensor and a null state otherwise. A second sensor is configured to detect the presence of the blade guard and has a null state when the blade guard is detected and a non-null state otherwise. A controller is operable to determine the states of the first and second sensors and to disengage power to the drive motor when the mains switch is actuated when the states of the first and second sensors are different.

Apparatus and Method for Cutting or Slotting Rigid Material, in Particular Wood

A device serves for cleaving or slitting preferably wood. It has a narrow tool, in particular a circular saw blade (15), which possesses cutting elements and produces a gap of finite width in the sawn article (10). The tool and the sawn article (10) are moved in a feed direction (30) relative to one another. A cleaving element (20) is arranged directly behind the cutting elements in the feed direction (30) of the sawn article (10). A profiled piece (12) separated from a sawn-article remainder (13) by the gap is thus bent out of the gap plane (11) away from the sawn-article remainder (13). A deflecting device (27, 28) is arranged at a first distance (L1) from the cleaving element (20) and exerts a force (F1) on the surface (44) of the profiled piece (12) facing away from the gap plane (11). A supporting device (40 to 42) is arranged at a second distance (L2) from the cleaving element (20) which is smaller than the first distance (L1). The supporting device (40 to 42) exerts a force (F2) on the surface (45) of the profiled piece (12) facing the gap plane (11) (Fig. 2). <IMAGE>

Cross-cutting of felled trees

Method of guiding saw blades and device for carrying out the method

A method and a device for carrying out the method of guiding the blades (4) of a circular saw in operation, such as at the sawing of, for example, saw timber, timber blocks, battens or other workpieces on wood basis, where one or several blades (4) are located at an axle (6) and each blade is guided by at least one guide (9,11) acting on the blade. At least one of the guides (9,11) of each blade (4), and in such a case guides corresponding to each other for all blades (4), separate or together with said corresponding guide of remaining blades in the form of a guide package (9',11') during the sawing are floating substantially in the axial direction of the blades (4) and hereby continuously positioned laterally in response to movements and position of the workpiece (1) being sawn, substantially in the axial direction of the blades in connection to the guide or guide package and/or the lateral movements and lateral position of the blade(s) in connection to the guide (9,11) or guide package (9',11').

Protective cover structure of a desk sawing machine

A protective cover structure of a desk sawing machine includes a chopper board, a cover, two first side boards and two second side boards. The cover is disposed at an upper end of the chopper board. The two first side boards respectively disposed at two sides of the cover. One end of each of the first side boards is pivotally connected to the cover. The two second side boards respectively connected to another end of each of the first side boards. The first side boards and the second side boards can be operated independently to enhance shelter. The desk sawing machine can keep off the sawdust when cutting, providing a protective effect to the equipment and the user.

Modular table saw guarding system upper guard barrier

A preferred embodiment of the present invention is directed to a modular saw guard system for a power saw of the type which has a table top, a rotatable circular saw blade that is vertically adjustable relative to the table top, the table top having an opening through which the saw blade can extend, the blade being configured to cut a work piece as the work piece is moved forwardly from a forward position to a rearward position, wherein the system comprises a riving knife mechanism releasably mounted to the saw rearwardly of the blade, and being configured to be adjustable between retracted and extended positions relative to the blade, a blade guard mechanism that is releasably mounted to the riving knife mechanism when the riving knife mechanism is at least in its extended position, the blade guard mechanism generally covering the blade and being adjustable to enable a work piece to be moved into cutting position by the blade and a kickback prevention mechanism that is releasably mounted to the riving knife mechanism when the riving knife mechanism is at least in its extended position, the kickback prevention mechanism being configured to engage a work piece as it is being cut by the blade and apply resistance to prevent the work piece from being expelled in the reverse direction.

Expanding wedge that can be driven into the saw joint of tree trunks using a wood screw

Splitter and cutting member guard assembly

A splitter and cutting member guard assembly for mounting on a table saw or other similarly constructed device including a circular saw blade or other rotating, oscillating, or otherwise driven cutting member, a table portion including a workpiece supporting surface and having a void therethrough for passage of a portion of the cutting member, and a table insert removably disposed within the void and including a slot for passage of the cutting member. The splitter and cutting member assembly includes a cutting member guard hood for covering an operative portion of the cutting member and a splitter for passing through a workpiece kerf as the workpiece is fed past the splitter. The cutting member guard hood is movably mounted to the splitter and is pivotable or otherwise movable relative to the splitter between a first position, in which the cutting member hood covers the operative portion of the cutting member, and a second position, in which the operative portion of the cutting member is not covered by the cutting member guard hood. The cutting member guard hood may be retained in the second position if the table insert is removed from the void in the table portion.

Separator unit for lumber strips

Kerf control apparatus for a table saw

An apparatus ( 148 ) for controlling a kerf formed in a work piece by a table saw blade. The apparatus may include a splitter ( 114 ) securely positioned to the saw table behind the saw blade, and a kerf keeper ( 118 ) that is positioned behind the splitter while the kerf remains open. The kerf keeper may be easily displaced and will automatically move with the work piece when pinched by a closing kerf, thereby keeping the kerf opened and limiting the amount of force exerted by the closing kerf on the saw blade and the splitter. A drill guide base ( 110 ) and optionally an adjustable rear drill guide ( 112 ) provide for precisely locating the mounting holes for the splitter and kerf keeper relative to the sides of an actual kerf formed by the saw blade. The splitter and/or kerf keeper may be formed by injection molding of a plastic coating ( 176 ) over a stamped or die cut metal core ( 174 ).

Patent NO134028B

Tre fell ingskileanordning,.

Method and apparatus for planing and longitudinal sawing of lamellae, in particular for laminated wood

By a method of planing and longitudinally sawing lamellae for laminated wood from wooden boards (2) being slightly curved in cross-section each wooden board (2) is arranged on a plane (1) with its hollow side (3) facing downwards. During movement along the plane (1) the lateral faces (14, 15) of the board (2) are smoothed by means of lateral cutters (10, 11), whereafter the board (2) guided by the abutment of the smoothed lateral faces against the lateral guides is sawn partially through from below by means of a lower saw (31) for the formation of a plurality of lamallae (33-39) mutually connected at their upper ends. The board (2) is then pressed downwards against the plane and planed on its upper and lower face by means of upper and lower cutters (52, 51) and thereafter sawn completely through by means of an upper saw (53) at least in the areas of the board corresponding to the areas partially sawn through from below. When the movement of the board is being guided the smoothed lateral faces are only made to abut against the lateral guides in an area of the board (2) above half the height thereof.

Clamping device

The invention concerns a clamping device for use by individuals when cutting sheet material, such as planks or boards. The device comprises an upper clamping surface (1), a lower clamping surface (2) and a projection (3) extending downwardly from the upper clamping surface (1) into an aperture (4) of the lower clamping surface (2). In use, the clamping device is slipped onto an end face of sheet material after an initial cut has been made. The user can then proceed to extend the saw cut using a hand saw, jigsaw etc., safe in the knowledge that the clamping device will prevent excessive vibration of the cut ends of the material and that the projection (3) will maintain the gap (known as the kerf) between the cut open.

Work holder for saw - has two support blocks connected by strips with locking teeth

Power equipment with quick release anti-kickback device

A power equipment in one embodiment includes a riving knife with a circular mounting hole opening to an outer surface of the riving knife through a throat, the throat having a minimum diameter that is less than a minimum diameter of the mounting hole, and an anti-kickback assembly including a generally cylindrical grooved shaft having a first diameter larger than a minimum diameter of the throat and a second diameter smaller than the minimum diameter of the throat, and an actuating arm operably connected to the grooved shaft and configured to rotate the grooved shaft from a first position whereat the second diameter is aligned with the throat and a second position whereat the second diameter is not aligned with the throat.

Patent DE3517408C2

Anti-jamming device for chain saws

Low profile hardwood flooring strip and method of manufacture

A method of producing a hardwood flooring product, including the steps of processing a strip of raw wood into a blank having a predetermined thickness and width, and top and bottom surfaces defining parallel planes relative to each other, and splitting the blank along the width of the blank from one side to the other to form two low profile flooring strips having the same width as the blank and a thickness less than one-half the thickness of the blank. The splitting step includes the steps of providing first and second circular saw blades mounted on spaced-apart vertical axes for rotation in a single plane intermediate and parallel to the planes of the top and bottom surfaces of the blank and positioning the blank on conveying means upstream from the saw blades with the plane of rotation of the saw blades intermediate and parallel to the planes of the top and bottom surfaces of the blank for movement of the blank from an upstream position to a downstream position relative to the saw blades. The blank is moved downstream into the plane of rotation of the saw blades during rotation of the saw blades thereby horizontally splitting the blank to form first and second low-profile flooring strips. Interlocking members, such as molded, mating tongue and groove members, are molded into first and second longitudinally-extending side edges of the flooring strips for securing together the flooring strips when placed side-to-side to form a floor,

Circular saw operating mechanism - has bevel-edged guard housed in swinging casing mechanically operated by motorised set of gears

The saw (4) has a bevel edged guard (8) and is driven by an electric motor (5) housed in a swinging casing (2) fixed to a base plate (1). The casing (2) pivots on an axle (3) to adjust the depth of the saw (4). The guard (8) is attached to a guide device which forces it on to a path concentric with the saw axis. Between the casing (2) and the guard (8) is a geared mechanism (14,18), of which one gear (14) is in mesh with the rack (13) on the casing (2), and another associated gear (18) is in mesh with the rack (19) on the guard (8). USE/ADVANTAGE - The saw blade is covered during all work processes.

Detection systems for power equipment

Methods to detect when a human body contacts a predetermined portion of a machine are disclosed. The methods distinguish contact with a person from contact with other materials. The methods are particularly applicable in woodworking equipment such as power saws to distinguish contact between a person and the blade of the saw from contact between the blade and wet or green wood. Woodworking machines and memory devices for use in woodworking machines having safety systems designed to detect a dangerous condition between a human and a dangerous portion of the woodworking machine and to trigger some action to mitigate the dangerous condition are also disclosed.

Circular saw

Circular saw (30; 40; 50; 60; 65; 70; 80; 90), comprising a saw blade (36) driven in rotation about a pivot axis (37) and at least one first splitting wedge (38), wherein the circular saw (30; 40; 50; 60; 65; 70; 80; 90) is configured such that the first splitting wedge (38) can be moved relative to the pivot axis (37) of the saw blade (36).

Cover mounting structure of cutting blade in cutting machine

【課題】 テーブル上に載置した切断材を移動させて切断する切断機において、キックバック防止用の割刃に切断刃のカバーを取り付ける場合、従来は割刃の両側面から突き出すように固定された支持軸と介してカバーを支持する構成となっていたので、溝切り加工等を行う場合にはカバーのみならず割刃も取り外す必要があった。本発明では、カバーを取り外した状態であっても割刃をそのまま利用してキックバックを防止しつつ溝切り加工等行えるようにする。 【解決手段】 割刃１２の両側から受け部材２１と操作部材２２を相互にねじ結合して、両部材２１，２２間に割刃１２を挟み込んで固定し、この受け部材２１と操作部材２２にカバー１０の支持縁部１０ａ，１０ｂを回転可能に支持する構成とする。 【選択図】 図１

Modular table saw guarding system upper guard barrier

Embodiments are directed to a modular saw guard system for a power saw having a top and a vertically adjustable blade, the system comprises a riving knife mechanism, a blade guard mechanism that is releasably mounted to the riving knife mechanism when the riving knife mechanism is at least in its extended position, the blade guard mechanism generally covering the blade and being adjustable to enable a work piece to be moved into cutting position by the blade and a kickback prevention mechanism that is releasably mounted to the riving knife mechanism when the riving knife mechanism is at least in its extended position, the kickback prevention mechanism being configured to engage a work piece as it is being cut by the blade and apply resistance to prevent the work piece from being expelled in the reverse direction.

TRED FELL device

A method for use in felling a tree using a circular saw mounted on the bottom end of a felling head frame. The tree is cut by the saw and allowed to drop on a butt plate carried by the frame after which it is gripped by gripping means carried on the frame. The invention is also directed toward an apparatus for carrying out the above method.

Patent FR2534833B3

"IMPROVEMENTS INTRODUCED IN A CONSTRUCTION ELEMENT".