Настройки

Укажите год
-

Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

Подробнее
-

Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 3666. Отображено 100.
31-05-2012 дата публикации

Electric saw device having two saw blades

Номер: US20120132048A1
Автор: John Chung -Kuang Chen
Принадлежит: Newstar Asia Ltd

An electric saw device having two saw blades being arranged for allowing the two saw blades to be driven to rotate in opposite directions. The two saw blades are respectively formed with circular grooves on their inner surfaces at positions corresponding to each other while enabling the centers of the two circular grooves to aligned with the rotation axes of corresponding saw blades. The electric saw device has a plurality of steel balls, each being sandwiched between the two saw blades while insetting into the circular grooves simultaneously, by that the saw blades are separated from each other by a specific interval. Accordingly, when the two saw blades are rotating in opposite direction, each of the steel balls is acting as a roller bearing for maintaining the two saw blades to be properly separated from each other, and thus preventing the two saw blades from overheating and softened by friction.

Подробнее
Номер записи: 1
26-07-2012 дата публикации

Detection systems for power equipment

Номер: US20120186699A1
Автор: Stephen F. Gass
Принадлежит: SD3 LLC

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.

Подробнее
Номер записи: 2
20-06-2013 дата публикации

Safety system in a portable tool

Номер: US20130152752A1
Автор: Cesare Svelto, Michele Noriga, Paolo Cappellari
Принадлежит: Redcap Tech Srl

Safety system in a portable tool ( 1 ) includes a pair of electrodes connected to a measurement and assessment unit, the measurement and assessment unit being an integrated circuit touch sensor device provided with a ground connector and with a sense electrode, wherein the ground connector is configured as internal floating ground connected to one electrode, the measurement and assessment unit configured for acquiring a reference capacity value measured between the two electrodes varies by a preset difference threshold with respect to the reference value, the safety signal being sent to a tool deactivation actuator.

Подробнее
Номер записи: 3
11-07-2013 дата публикации

Blade guard for a saw

Номер: US20130174707A1
Автор: Andreas Jonsson
Принадлежит: HUSQVARNA AB

A blade guard for a circular saw blade. The blade guard includes at least two pieces coupled together. The blade guard also includes at least one bottom plate having a slot formed therein for accommodating the circular saw blade and at least one top cover. Additionally, the blade guard includes a plurality of fastening rods for coupling the bottom plate with the top cover, the plurality of fastening rods further configured to secure the at least two pieces to the at least one bottom plate and the at least one top cover.

Подробнее
Номер записи: 4
07-11-2013 дата публикации

SAW BLADE, A SAWING MACHINE AND A SYSTEM THEREOF

Номер: US20130291696A1
Автор: Frolander Jim, Gustavsson Conny, Hultman Hasse, LINDEN Lars
Принадлежит: DellCron AB

The present invention relates to a saw blade for a sawing machine, said sawing machine () being arranged for cutting micro trenches by means of said saw blade (), wherein said micro trenches are adapted for receiving at least one duct/cable; wherein said saw blade comprises mechanical coding means () selected from the group consisting of holes, depressions and protrusions arranged on said saw blade (); and said holes, depressions and protrusions being coding elements for forming at least one code symbol () representing a unique identity (ID) for said saw blade. 1101. A saw blade for a sawing machine , said sawing machine () being arranged for cutting trenches by means of said saw blade () , wherein said trenches are adapted for receiving at least one duct/cable; characterised in that{'b': 2', '1, 'said saw blade comprises mechanical coding means () selected from the group consisting of holes, depressions and protrusions arranged on said saw blade (); and'}{'b': '4', 'said holes, depressions and protrusions being coding elements for forming at least one code symbol () representing a unique identity (ID) for said saw blade.'}23. Saw blade according to claim 1 , further comprising coding elements in the form of electro magnetic coding means ().33. Saw blade according to claim 2 , wherein said electro magnetic coding means () are comprised in a RFID device.4. Saw blade according to claim 1 , wherein a depth or a height or a spatial location or a size of said holes claim 1 , depressions and protaisions distinguishes different coding elements from each other.5410. Saw blade according to claim 1 , wherein said at least one code symbol () further function as an immobilizer for said sawing machine ().61110. Saw blade according to claim 1 , further comprising first attachment means (A) for attaching said saw blade () to said sawing machine ().7231. Saw blade according to claim 6 , wherein said mechanical coding means () and said electro magnetic coding means () are arranged ...

Подробнее
Номер записи: 5
16-01-2014 дата публикации

Saw, A Saw Blade, A Connection Mechanism and Associated Methods

Номер: US20140018811A1
Автор: Azagen MOOTIEN, Daniel Herzog
Принадлежит: DePuy Synthes Products Inc

The present disclosure relates to a saw, comprising a drive, a first blade configured to oscillate about an axis perpendicular to a plane defined by a surface of the first blade, a second blade configured to oscillate about an axis perpendicular to the plane in a direction opposite to that of the first blade, and wherein gearing is provided between the drive and the first and second blades to reduce the speed transmitted from the drive to the blades. A saw blade, a connection mechanism for connecting a blade to a saw and associated methods are also provided.

Подробнее
Номер записи: 6
06-02-2014 дата публикации

Universal Accessory for Oscillating Power Tool

Номер: US20140035242A1
Автор: James R. Niblett, Thomas R. Kaye, Jr.
Принадлежит: Individual

A combination kit includes an oscillating power tool and accessory. The tool includes a housing, motor, transmission to convert rotational motion to oscillating motion, output spindle, and accessory attachment mechanism. The mechanism has a first clamping face with projections, a second clamping face, and a central post. The accessory includes a working end, an opposite rear end, and a fitment adjacent the rear end. The fitment includes a generally U-shaped opening open at the rear end that receives the post, a first plurality of openings in communication with and extending radially outward from the U-shaped opening, and a second plurality of openings not in communication with and positioned radially outward from the U-shaped opening.

Подробнее
Номер записи: 7
27-02-2014 дата публикации

SAW BLADE AND A METHOD OF MANUFACTURING A SAW BLADE

Номер: US20140053704A1
Автор: ERICSSON Hans
Принадлежит: INDOCEAN DIAMOND TOOLS LIMITED

A saw blade () for a machine operating with adjacent saw teeth traveling in two opposite and parallel directions comprises a blade substrate, teeth (), and tooth necks () formed at the periphery of the substrate for holding the teeth () in place. Each tooth neck () has a protection surface (), which is located in a plane that is parallel to the plane of the blade substrate (), for protecting the tooth () against impact with any part of said adjacent saw blade. Each tooth () is located on the respective neck () in such a way that the tooth () is displaced from the protection surface () and from the adjacent saw blade in a direction normal to the plane of the protection surface (). 19-. (canceled)10. A saw blade for a machine operating with adjacent saw teeth traveling in two opposite and parallel directions , the saw blade comprisinga blade substrate,teeth, andtooth necks formed at the periphery of the substrate for holding the teeth in place,the saw blade having a surface intended for sliding against a contact area associated with an adjacent saw blade, wherein said surface is located adjacent to the tooth necks and that each tooth neck has a protection surface, which is located in a plane that is parallel to the plane of the blade substrate, for protecting the tooth against impact with any part of said adjacent saw blade, each tooth being located on the respective neck in such a way that the tooth is displaced from the protection surface and from the adjacent saw blade in a direction normal to the plane of the protection surface.11. The saw blade according to claim 10 , wherein a contact zone located at the periphery of the blade substrate and said protection surfaces are located in substantially the same plane claim 10 , which is parallel to the plane of the blade substrate claim 10 , the contact zone and the protection surfaces thus all being able to slide against said contact area.12. The saw blade according to claim 10 , wherein the protection surfaces of the ...

Подробнее
Номер записи: 8
06-03-2014 дата публикации

PAIR OF SAW BLADES

Номер: US20140060280A1
Автор: Zhong Baowen
Принадлежит: Foshan Nanhai Sun Rising Tools Manufacturing Co., Ltd.

The present invention relates to pair of saw blades, comprising a first saw blade and a second saw blade which are coaxial and rotating in opposite directions, wherein each saw blade comprises a circular blade body and saw teeth at periphery of the blade body, a gap is arranged between the first saw blade and the second saw blade, the first blade body of the first saw blade is provided with a protrusion protruding toward the second saw blade, and the second blade body of the second saw blade is provided with a groove corresponding to the protrusion. Therefore, it is difficult to cause interference between the two saw blades even though either of the saw blades is deformed. 1. A pair of saw blades , comprising: each saw blade comprises a circular blade body and saw teeth at periphery of the blade body,', 'a gap is arranged between the first saw blade and the second saw blade,', 'the first blade body of the first saw blade is provided with a protrusion protruding toward the second saw blade, and', 'the second blade body of the second saw blade is provided with a notch corresponding to the protrusion., 'a first saw blade and a second saw blade which are coaxial and rotating in opposite directions, wherein2. The pair of saw blades according to claim 1 , wherein the notch is annular and the annular notch is coaxial with the second blade body.3. The pair of saw blades according to claim 1 , wherein the height of the protrusion relative to the first blade body is greater than the depth of the notch of the second blade body.4. The pair of saw blades according to claim 1 , wherein the width of the notch is greater than that of the protrusion.5. The pair of saw blades according to claim 1 , wherein the first saw blade or the second saw blade is formed integrally.6. The pair of saw blades according to claim 1 , wherein the protrusion is located at any one or more positions between ¼ of the diameter of the first blade body and the end of the saw teeth claim 1 , and the second ...

Подробнее
Номер записи: 9
07-01-2021 дата публикации

Apparatus for Successively Cutting and Driving a Shaft

Номер: US20210001445A1
Автор: Blasi Robert A.
Принадлежит:

An apparatus for cutting and driving a shaft which extends from a hub, the apparatus incorporating a hub adapter fitted to receive the hub; a plurality of set screws mounted upon the hub adapter for clamping the adapter upon the hub; a half of a releasable fastener attached to the hub; a pair of adapters which are fitted for alternatively receiving the hub adapter; a pair of second halves of the releasable fastener which are adapted for alternatively completing the releasable fastener, wherein each of the second halves of the releasable fastener is connected to one of the adapters among the pair of adapters; a pivoting rotary saw connected to one of the adapters among the pair of adapters; and a shaft driver tool connected to the other of the adapters among the pair of adapters. 1. An apparatus for successively cutting and driving a shaft , said shaft extending from a hub , said apparatus comprising:(a) a first adapter fitted for receiving the hub, said first adapter having an upper opening;(b) a plurality of set screws mounted operatively upon the first adapter, said set screws being positioned for, upon the first adapter's receipt of the hub, attaching the first adapter to hub;(c) a first half of a releasable fastener, said fastener half being fixedly attached to or formed wholly with the first adapter;(d) a pair of second adapters, each adapter among said pair of adapters being fitted for receiving the first adapter;(e) a pair of second halves of said releasable fastener, wherein each fastener half among said pair of second fastener halves is adapted for engaging said fastener's first half, wherein one of the releasable fastener halves among said pair releasable fastener halves is fixedly attached to or formed wholly with one of the adapters among the pair of second adapters, and wherein the other releasable fastener half among said pair of releasable fastener halves is fixedly attached to or formed wholly with the other second adapter;(f) a saw connected ...

Подробнее
Номер записи: 10
02-01-2020 дата публикации

SHIELDING DEVICE FOR A SAW, IN PARTICULAR A TABLE SAW, AND SAW EQUIPPED WITH SUCH A SHIELDING DEVICE, IN PARTICULAR A TABLE SAW

Номер: US20200001496A1
Автор: Bindhammer Markus
Принадлежит: Scheppach Fabrikation von Holzbearbeitungsmaschinen GmbH

The invention is concerned with a shielding device () for shielding a saw blade () or band of a sawing machine against access by an operator and against ejection of workpiece parts, which can be attached to the sawing machine in such a way that, in a working position, it covers the saw blade () or band towards the operator. The shielding device () comprises a temperature monitoring unit () which has a temperature sensor (). 1133124. A shielding device () for shielding a saw blade () or band of a sawing machine against access by an operator and against ejection of workpiece parts , which can be attached to the sawing machine in such a way that , in a working position , it covers the saw blade () or band towards the operator , the shielding device () comprising a temperature monitoring unit () which has a temperature sensor () , wherein{'b': 4', '1', '3', '5', '4', '3, 'the temperature sensor () operates without contact and, with the shielding device () mounted on the sawing machine and located in the working position, is directed towards the toothing of the saw blade () or band, and a display device () displays the surface temperature detected by the temperature sensor () on the surface of the toothing of the saw blade (), wherein'}{'b': 2', '1, 'the temperature monitoring unit () is formed as an autarkic operating unit and is mounted on the shielding device () such that it is detachable by an operator without tools.'}2111. The shielding device () according to claim 1 , wherein the shielding device () is formed as a saw blade guard () mountable above a table of a circular table saw.31286. The shielding device () according to claim 1 , wherein the temperature monitoring unit () is battery or accumulator-operated and comprises a battery compartment claim 1 , which is preferably accessible via a removable cover () claim 1 , for accommodating batteries () or accumulators.412. The shielding device () according to claim 3 , wherein the temperature monitoring unit () has an ...

Подробнее
Номер записи: 11
14-01-2016 дата публикации

TABLE SAWS

Номер: US20160008997A1
Автор: Fanning David A., Fulmer J. David, Gass Stephen F.
Принадлежит: SD3, LLC

Table saws with safety systems are disclosed. The safety systems detect and react to dangerous conditions, such as contact between the blade and a person. The table saws may include a switch, a first light that illuminates to indicate the safety system is operable, and a second light that illuminates to indicate that the safety system is inoperable. The switch may not power the saw when switched on if the second light is illuminated. 1. A table saw comprising:a table;a housing supporting the table;a circular blade;a motor that spins the blade;electronics that detect contact between the blade and a person;a safety system that stops or retracts the blade when contact between the blade and a person is detected;a switch supported by the housing and switchable between an “on” position and an “off” position to start and stop the motor;a first light that illuminates to indicate the safety system is operable; anda second light that illuminates to indicate that the safety system is inoperable;where the motor does not spin the blade when the switch is switched to the “on” position if the second light is illuminated.2. The table saw of claim 1 , where the first light is green and the second light is red.3. The table saw of claim 1 , where the housing has a front and where the switch claim 1 , the first light claim 1 , and the second light are supported on the front of the housing to the left of the blade. This application is a continuation of the following U.S. patent applications, all of which are hereby incorporated by reference in their entireties:Ser. No. 12/806,829, filed Aug. 20, 2010, which is a continuation of Ser. No. 09/929,426, filed Aug. 13, 2001, issuing as U.S. Pat. No. 7,210,383 on May 1, 2007, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/225,200, filed Aug. 14, 2000;and Ser. No. 12/806,829 is also a continuation of Ser. No. 12/655,695, filed Jan. 4, 2010, issuing as U.S. Pat. No. 8,006,595 on Aug. 30, 2011, which ...

Подробнее
Номер записи: 12
27-01-2022 дата публикации

SAWING DEVICE

Номер: US20220024066A1
Автор: WEINMANN Karl
Принадлежит: Weinmann Holzbausystemtechnik GmbH

A sawing device, in particular for separating long workpiece parts, has a saw blade and a retaining device for separated workpiece parts, wherein the retaining device has a retaining element, at least on the side of the saw blade facing the workpiece part that is to be separated, which retaining element is arranged ahead of the saw blade in the machining direction of the workpiece and movably in such a way that it is movable from an inactive position above the workpiece into an active position which reaches ahead of the front end of the workpiece. 11213141131617121411215141414214. A sawing device , in particular for separating long workpiece parts , comprising a saw blade () and a retaining device () for separated workpiece parts (.) , wherein the retaining device () has a retaining element ( , ) , at least on a side of the saw blade () facing the workpiece part (.) that is to be separated , which retaining element is arranged ahead of the saw blade () in a machining direction () of the workpiece () and movably in such a way that the retaining element is movable from an inactive position above the workpiece () into an active position which reaches ahead of a front end (.) of the workpiece ().213161712. The sawing device according to claim 1 , wherein the retaining device () has a retaining element ( claim 1 , ) on both sides of the saw blade ().31617101414214. The sawing device according to claim 1 , wherein the retaining element ( claim 1 , ) are pivotably arranged on the sawing device () in such a way that the retaining element can be pivoted from an inactive position resting on the surface of the workpiece () into an active position reaching ahead of the front end (.) of the workpiece ().416171214214. The sawing device according to claim 1 , wherein the retaining element ( claim 1 , ) can be automatically moved into the active position shortly before the saw blade () reaches the front end (.) of the workpiece ().516171819. The sawing device according to claim 1 , ...

Подробнее
Номер записи: 13
10-01-2019 дата публикации

Miter saw

Номер: US20190009425A1
Автор: Connor P. SPRAGUE
Принадлежит: Milwaukee Electric Tool Corp

A bevel angle lock and detent system for a miter saw includes a first locking unit fixed relative to the turntable and a second locking unit coupled to a bevel arm of the miter saw. An actuator is moveable between a first position and a second position to move the second locking unit relative to the first locking unit. In the first position, a brake member of the second locking unit is engaged with an arcuate surface of the first locking unit to lock a saw unit relative to a turntable. In the second position, the brake member is disengaged from the arcuate surface, thereby permitting pivoting movement of the saw unit, and a detent member of the second locking unit is engageable a detent aperture of the first locking unit to locate the saw unit relative to the turntable at one predetermined bevel angle.

Подробнее
Номер записи: 14
17-01-2019 дата публикации

SAFETY SYSTEMS FOR POWER EQUIPMENT

Номер: US20190016006A1
Автор: Gass Stephen F.
Принадлежит: SawStop Holding LLC

Machines with safety systems are disclosed. The machine may take the form of woodworking machines including table saws, band saws, miter saws, hand-held circular saws, pneumatic chop saws, radial-arm saws, jointers, planars, routers and shapers. The machines may include an operative structure configured to perform a task, where the operative structure includes a cutting tool adapted to move in at least one motion, and a safety system adapted to detect the occurrence of an unsafe condition between a person and the cutting tool and for mitigating the unsafe condition. The safety system may include a detection subsystem and a reaction subsystem. The machine may also include a bypass or override mode where in an injury mitigation system is disabled for certain cuts. 1. A machine comprising:a blade; andan injury mitigation system with a normal mode wherein the injury mitigation system is configured to take an action to mitigate injury in the event of contact between the user and the blade, and a bypass mode wherein the injury mitigation system is disabled and takes no action to mitigate injury in the event of contact between the user and the blade.2. The machine of claim 1 , where the action is to stop or retract the blade. This application is a continuation of U.S. patent application Ser. No. 15/670,374, filed Aug. 7, 2017, which is a continuation of U.S. patent application Ser. No. 10/100,211, filed Mar. 13, 2002, issuing as U.S. Pat. No. 9,724,840 on Aug. 8, 2017, which claims the benefit of and priority from U.S. Provisional Patent Application Ser. No. 60/275,583, filed Mar. 13, 2001, all of which are hereby incorporated by reference.This application hereby incorporates by reference the following U.S. patent application: Ser. No. 09/676,190, filed Sep. 29, 2000. This application also hereby incorporates by reference the following PCT patent application: PCT/US00/26812, filed Sep. 29, 2000. This application further incorporates by reference the following U.S. ...

Подробнее
Номер записи: 15
21-01-2021 дата публикации

OSCILLATING TOOL

Номер: US20210016411A1
Автор: Covell Kevin W., KUEHNE Brent A., Sergyeyenko Oleksiy P.
Принадлежит:

A clamp arrangement for securing an accessory to an oscillating power tool can include a clamp assembly including a first clamp member that moves relative to the accessory between a closed position wherein the clamp assembly retains the accessory and an open position wherein the first clamp is offset from the accessory permitting removal of the first accessory from the clamp assembly. The clamp assembly can further comprise a second clamp member having a first portion that opposes the first clamp member and cooperates with the first clamp member to clamp the accessory between the first and second clamp members. An attachment plate can carry the clamp assembly. The attachment plate can have a first mating detail formed thereon that is configured to selectively and removably mate with a complementary second mating detail on the power tool in an assembled position. 1. A power tool configured to hold an accessory so as to be operable by a user of the tool to drive the accessory , the power tool comprising:a housing;a motor housed in the housing;a spindle mounted in the housing and drivable in an oscillating motion by the motor about an output axis;a clamp assembly arranged at a lower end of the spindle, the clamp assembly comprising opposed first and second clamping members configured to hold the accessory therebetween;a biasing member providing a clamping force for the clamp assembly, the biasing member partially surrounding the output axis; anda user-operable lever for operating the clamp assembly;wherein the spindle has a first section with a first diameter and a second section with a second diameter different than the first diameter.2. The power tool of claim 1 , further comprising a first bearing at the first section of the spindle and a second bearing at the second section of the spindle.3. The power tool of claim 2 , wherein the motor drives the spindle through an output member; andwherein the output member engages the spindle between the first bearing and the ...

Подробнее
Номер записи: 16
22-01-2015 дата публикации

BAND SAW MACHINE CAPABLE OF AUTOMATICALLY REGULATING CUTTING SPEED

Номер: US20150020660A1
Автор: Huang Yu-Xian, JENG Yeau-Ren
Принадлежит:

A band saw machine includes a chassis, a motor mounted to chassis, a driving wheel mounted to the chassis and connected with the motor, a driven wheel mounted to the chassis, a band saw running on the driving and driven wheels, a band-saw regulator mounted to the chassis and located between the driving and driven wheels, and a force sensor mounted inside the band-saw regulator for sensing how much a force is applied to the band-saw regulator in the process of cutting and for emitting a sensing signal to a control system. In this way, the control system can control the rotational speed of the motor according to the sensing signal received from the force sensor to automatically regulate the cutting speed. 1. A band saw machine capable of automatically regulating cutting speed , comprising:a chassis;a motor mounted to the chassis and having a driving shaft;a driving wheel rotatably mounted to the chassis and connected with the driving shaft of the motor for making the driving wheel be driven by the motor for rotation;a driven wheel rotatably mounted to the chassis relative to the driving wheel;a band saw running on the driving and driven wheels;at least one band-saw regulator mounted to the chassis, located between the driving and driven wheels, and stopping against the band saw;at least one force sensor mounted inside the at least one band-saw regulator for sensing how much a force is applied to the at least one band-saw regulator in the processing of cutting and emitting a sensing signal each; anda control system electrically connected with the motor and the at least one force sensor for receiving the sensing signal and controlling power output from the motor to the driving wheel according to the at least one sensing signal.2. The band saw machine as defined in claim 1 , wherein said at least one force sensor is two in number and the two force sensors are mounted to the two band-saw regulators claim 1 , respectively.3. The band saw machine as defined in claim 1 , ...

Подробнее
Номер записи: 17
22-01-2015 дата публикации

TABLE CUTTING MACHINE

Номер: US20150020665A1
Автор: INAI Masahiko
Принадлежит:

A cutting machine can include a cutting machine body that is movably supported above a table and capable of vertical movement, the cutting machine body can be positioned at an upward waiting position and a lower end position. The cutting machine body can include an auxiliary cover positioned around a portion of a blade and including a projection. When in the upward waiting position the auxiliary cover is not able to move upward because of the position of the projection, and in the lower end position the auxiliary cover is able to move upward. 1. A cutting machine comprising:a table;a positioning fence vertically extending from the table;a cutting machine body including a blade, the cutting machine body being movably supported above the table and capable of vertical movement, wherein the cutting machine body includes at least an upward waiting position and a lower end position, the cutting machine body further including:a fixed cover positioned around a first portion of the blade;a movable cover positioned around a second portion of the blade;an auxiliary cover positioned around a third portion of the blade and including a projection,wherein the auxiliary cover includes a front lower end and a rear lower end, further wherein the rear lower end extends at an oblique angle to the front lower end; andwherein when the cutting machine body in the lower end portion moves backward, the rear lower end of the auxiliary cover contacts at least one of the positioning fence and workpiece, so that the auxiliary cover moves upwards and the front lower end of the auxiliary cover moves within the fixed cover.2. The cutting machine of claim 1 , further including a base that supports the table claim 1 , wherein the positioning fence is mounted to the base.3. The cutting machine of claim 1 , wherein the auxiliary cover is supported inside of the fixed cover via a shaft.4. The cutting machine of claim 1 , further wherein the auxiliary cover is biased downward by a spring interposed ...

Подробнее
Номер записи: 18
22-01-2015 дата публикации

Cutting apparatus

Номер: US20150020666A1
Автор: Nobuhiko Wakita
Принадлежит: Disco Corp

A cutting unit includes a spindle, a spindle housing, a support flange on the front of the spindle, a cutting blade detachably supported to the support flange, and a fixing flange for fixing the cutting blade to the support flange. The support flange includes a boss portion adapted to be inserted through a central opening of the cutting blade, a flange portion for supporting one side surface of the cutting blade, and a cylindrical portion for engaging the front of the spindle. The flange portion has a suction hole opening toward the fixing flange, and the cylindrical portion has a communication hole communicating with the suction hole. The communication hole is connected to a vacuum source through a rotary joint fixed to the spindle housing so that communication between the communication hole and the vacuum source is selectively made by an on-off valve.

Подробнее
Номер записи: 19
24-01-2019 дата публикации

OSCILLATING TOOL

Номер: US20190022816A1
Автор: Covell Kevin W., KUEHNE Brent A., Sergyeyenko Oleksiy
Принадлежит:

A clamp arrangement for securing an accessory to an oscillating power tool can include a clamp assembly including a first clamp member that moves relative to the accessory between a closed position wherein the clamp assembly retains the accessory and an open position wherein the first clamp is offset from the accessory permitting removal of the first accessory from the clamp assembly. The clamp assembly can further comprise a second clamp member having a first portion that opposes the first clamp member and cooperates with the first clamp member to clamp the accessory between the first and second clamp members. An attachment plate can carry the clamp assembly. The attachment plate can have a first mating detail formed thereon that is configured to selectively and removably mate with a complementary second mating detail on the power tool in an assembled position. 1. A power tool comprising:a housing;a motor mounted in the housing;an output member driven by the motor;a spindle coupled to the output member and driven by the motor, through the output member, in an oscillating motion;a clamp assembly coupled to the spindle and configured to retain an accessory, the clamp assembly including a first clamping member that moves between a clamped position wherein the clamp assembly retains the accessory in a clamped condition with a clamping force for holding the accessory during operation of the power tool and an unclamped position permitting removal of the accessory from the clamp assembly while the first clamping member remains coupled to the power tool, the clamp assembly further comprising a second clamping member that cooperates with the first clamping member to retain the accessory in the clamp assembly; andan actuator movable from a first position to a second position, wherein movement of the actuator from the first position to the second position causes the first clamp member to move from the clamped position to the unclamped position;wherein the spindle includes a ...

Подробнее
Номер записи: 20
23-01-2020 дата публикации

SPLITTER PROFILER

Номер: US20200023540A1
Автор: Blomquist Christopher W., Whitaker Benjamin Owen
Принадлежит:

In various embodiments, a splitter profiler apparatus may include at least one profiler head and at least one circular saw mounted to a common arbor. The circular saw may be mounted to a saw arm, and the saw arm may be coupled with an actuator that is selectively operable to move the circular saw along the arbor. The circular saw may be used in a profiling position, in which the circular saw and profiler head are in close proximity, such that the profiler head and circular saw function collectively to form a sideboard edge with a sawn finish. The circular saw may also be used in a splitting position, in which the circular saw is at a distance from the profiler, to divide the sideboard into narrower sideboards before the sideboards are sawn from the primary workpiece. Corresponding methods and systems are also described herein. 1. A splitter profiler module , comprising:a frame;an arbor rotatably coupled with the frame;a first profiler head and a second profiler head mounted along the arbor; anda first saw arm assembly movably coupled to the arbor and the frame, wherein the first saw arm assembly is configured to retain a first circular saw blade mounted along the arbor between the profiler heads, and the first saw arm assembly is selectively moveable relative to the frame to thereby move the first circular saw blade axially along the arbor.2. The splitter profiler module of claim 1 , wherein the saw arm assembly includes a saw arm and a saw sleeve assembly claim 1 , and wherein the saw sleeve assembly has a center annulus configured to slideably engage the arbor.3. The splitter profiler module of claim 2 , wherein the saw sleeve assembly includes a first portion with said center annulus and a second portion claim 2 , and the first portion is disposed at least partially through the second portion.4. The splitter profiler module of claim 3 , wherein the first portion includes a bearing housing claim 3 , a bushing claim 3 , or a sleeve bearing claim 3 , and the second ...

Подробнее
Номер записи: 21
02-02-2017 дата публикации

SAW BLADE WITH REDUCED MODAL FREQUENCIES IN THE OPERATING FREQUENCY RANGE

Номер: US20170028488A1
Автор: BRUTSCHER David, ROOMY Sajid A., WELLS John P.
Принадлежит:

A saw blade is provided including a circular metal disc including a circular metal disc including a central aperture and a plurality of teeth spaced around a periphery of the circular metal disc. A first plurality of fully enclosed body slots are generally equally spaced from a center of the circular metal disc by a first distance and a second plurality of fully enclosed body slots are each disposed directly radially outward from a respective one of the first plurality of body slots. The second plurality of slots are generally equally spaced from the center of the circular metal disc by a second distance greater than the first distance. The saw blade design provides a blade with no modal frequencies in the operating frequency range. 1. A circular cutting blade comprising:a circular body including a periphery and a central aperture defining a center point;a plurality of teeth spaced around the periphery of the body;a set of fully enclosed, arcuate, inner body slots defined in the body concentric with the center point, each inner body slot extending in a circumferential direction from a first distal end to a second distal, where all of the inner body slots are disposed a first radial distance from the center point, and each pair of adjacent inner body slots are spaced apart by an equal circumferential distance; anda set of fully enclosed, arcuate, outer body slots defined in the body concentric with the center point, each outer body slot extending in a circumferential direction from a third distal end to a fourth distal, where all of the outer body slots are disposed a second radial distance from the center point that is greater than the first radial distance, and each pair of adjacent outer body slots are spaced apart by an equal circumferential distance, wherein each outer body slot is generally aligned radially with a corresponding one of the first body slots.2. The circular cutting blade of claim 1 , wherein for each outer body slot and the corresponding one of ...

Подробнее
Номер записи: 22
31-01-2019 дата публикации

METHOD FOR DETECTING A SUBSTANCE

Номер: US20190030670A1
Автор: BLEICHER Friedrich, CAUDR Helmut, WEILER Thomas
Принадлежит:

A method is provided for detecting a substance, preferably human tissue, in the vicinity of a mobile tool, wherein the substance to be detected has different electrical characteristics from a material that can be processed by the mobile tool. In the method, a change is detected in a capacitance formed by the tool and a counter electrode that is electrically insulated from the tool. A periodic change in the capacitance is detected and the change is produced by the presence of the substance in a region in relation to the tool and by a periodic change in a geometrical characteristic of the tool in this region as the tool moves. 1. A method for detecting a substance , preferably human tissue , in the vicinity of a movable tool , wherein the substance to be detected differs in its electrical properties from a material which can be processed by means of the movable tool , and wherein in the method a change in a capacitance formed by the too and a counterpart electrode that is electrically insulated from the tool is detected , characterized in that a periodic change in the capacitance is detected , wherein said change is caused by the substance being arranged in a region relative to the tool and by a geometrical property of the tool in said region changing periodically upon a movement of the tool.2. The method as set forth in claim 1 , wherein the tool is a machining tool claim 1 , preferably a circular saw blade.3. The method as set forth in claim 1 , wherein the geometrical property which changes periodically in the region upon movement of the tool is given by:a cutting geometry of at least one tool cutting edge, in particular by a succession of saw teeth, and/orat least one material recess, and/orat least one material deposit, and/orat least one shaped configuration.4. The method as set forth in claim 1 , wherein the movement of the tool is a guided movement claim 1 , preferably a rotary movement.5. The method as set forth in claim 1 , wherein the counterpart electrode ...

Подробнее
Номер записи: 23
01-05-2014 дата публикации

SAFETY DEVICE FOR POWER CUTTING TOOLS

Номер: US20140116219A1
Автор: NIICHEL WILLIAM
Принадлежит:

A system of safety devices is disclosed for use in connection with powered cutting tools, including but not limited to table saws, miter saws, jointers, shapers and routers. The devices include a right hand push device adapted to slide along the fence of a table saw, shaper, router or jointer, a dual bearing hold down device to secure a work piece in at least three directions and adapted for use with a table saw, shaper, router or jointer, an anti-kickback device to secure a work piece after a cut is made and while cutting continues and adapted for use with a table saw, shaper, router or jointer, a left hand hold down device for securing a work piece on the side of a cutting blade opposite that of a fence and adapted for use with a table saw, shaper, router or jointer, and a hold down device adapted for use with miter saws. Each of the devices, alone and in combination, protect the operator of the power tools from serious injury from the cutting tool and from work piece kickback. 1. An anti-kickback safety device adapted for use with a powered cutting tool , the power cutting tool having a planer work surface , comprising:a. A frame adapted to be secured to the cutting tool;b. A hold down arm pivotally connected to the frame and extending outwardly from the frame, the hold down arm having a proximal end and a distal end;c. Bearing means disposed at the distal end of the hold down arm; andd. Biasing means applying a force to the proximal end of the hold down arm to push the bearing means in a vertical downward direction.2. The anti-kickback device of claim 1 , wherein the biasing means comprises a shaft rotatably interconnected with the frame claim 1 , with one end of the shaft interconnected to the proximal end of the hold down arm claim 1 , and a spring operatively associated with the shaft to apply a rotational biasing force to the shaft.3. The anti-kickback device of claim 2 , further comprising a rotatable collar surrounding a length of the shaft claim 2 , the ...

Подробнее
Номер записи: 24
04-02-2021 дата публикации

Tool device

Номер: US20210031273A1
Автор: Bruno Luescher, Daniel Grolimund, Fabian Bek, Juergen Blickle, Milan Bozic, Olaf Klabunde, Stefano Delfini, Thomas Mathys, Walter Thomaschewski, Willi Fellmann
Принадлежит: C&E Fein GmbH and Co, ROBERT BOSCH GMBH

The invention relates to a tool device which is suitable for use with a machine tool, in particular a hand guided machine tool, having a driving device moving, in particular in an oscillating manner, around a driving axis. The tool device has an attachment device which allows it to be fastened on a machine tool such that its driving axis and an axis of rotation of the tool substantially coincide. The attachment device, for absorbing the driving force, has at least two driving area regions, which are spaced apart from said tool axis of rotation and each has a plurality of surface points. The tangent planes to said surface-area points are inclined in regard to an axial plane, which encloses the tool axis of rotation. Furthermore, said tangent planes are inclined regard to a radial plane which extends perpendicularly to the tool axis of rotation. This means that the torque introduced into the tool device by the machine tool, via the driving device, is reliably absorbed.

Подробнее
Номер записи: 25
04-02-2021 дата публикации

Positioning Device for a Machine Tool, Machine Tool and Positioning Method

Номер: US20210031326A1
Автор: Delfini Stefano, Di Nicolantonio Aldo, Esenwein Florian, Sinzig Bruno, Tolazzi Massimo
Принадлежит:

A positioning device for a machine tool, in particular for a hand-held machine tool having a rotationally driveable output spindle, includes at least one positioning unit which is provided to stop and/or retain at least one output spindle of the machine tool and/or an insert tool arranged on the output spindle of the machine tool in at least one defined position. The positioning unit is provided for stopping and/or retaining the output spindle and/or the insert tool arranged on the output spindle in at least one defined position in an automatic manner, in particular without a user intervention, in particular starting from a working movement of the output spindle and/or of the insert tool arranged on the output spindle. 1. A positioning device for a power tool having an output spindle configured to be driven in rotation , comprising:at least one positioning unit, which is designed to automatically stop and/or hold at least one of the output spindle and an insert tool arranged on the output spindle in at least one defined position.2. The positioning device as claimed in claim 1 , wherein the positioning unit has at least one actuator element claim 1 , which is designed to act at least one of mechanically and magnetically at least upon the output spindle claim 1 , upon the insert tool arranged on the output spindle claim 1 , or upon a drive unit of the power tool that is configured to drive the output spindle.3. The positioning device as claimed in claim 2 , wherein the actuator element is designed to move a mechanical and/or electromagnetic braking element of the positioning unit or a mechanical engagement element of the positioning unit claim 2 , which is designed to act at least upon the output spindle claim 2 , the insert tool claim 2 , or the drive unit.4. The positioning device as claimed in claim 1 , wherein the positioning unit comprises an engagement element and at least one damping element claim 1 , which is designed to damp a mechanical engagement of the ...

Подробнее
Номер записи: 26
08-02-2018 дата публикации

Table Saw with Cutting Blade Safety Feature

Номер: US20180036812A1
Автор: Andrew Frolov, Gary L. VOONG
Принадлежит: ROBERT BOSCH GMBH, Robert Bosch Tool Corp

A power tool has a base defining a work surface, a rotary cutting blade extending through an opening in the work surface, a drive motor for imparting rotational movement to the cutting blade and a power train coupled between the drive motor and the cutting blade to transmit rotation movement from the drive motor to the cutting blade. A swing arm assembly carries the cutting blade and is pivotably supported on the base at a pivot axis. A latch support the swing arm assembly in an operating condition in which the cutting blade extends through the opening in the work surface and is configured to be released to permit the swing arm assembly to pivot about the pivot axis to a safety position in which the cutting blade is beneath the work surface. In one aspect of the present disclosure, the power tool includes a safety system operable in response to an emergency signal that includes a mechanism for stopping the rotation of the cutting blade, whereby the rotational inertia of the cutting blade is converted after the rotation is stopped to pivoting of the swing arm assembly carrying the blade when the rotation of the blade is stopped.

Подробнее
Номер записи: 27
08-02-2018 дата публикации

ARBORS FOR CIRCULAR SAWS AND ASSOCIATED SYSTEMS AND METHODS

Номер: US20180036900A1
Автор: Cuzdey Jacob
Принадлежит:

Arbors for circular saws and associated systems and methods are disclosed herein. In one embodiment, an arbor includes a coupler and a flange. The coupler can include an interior mounting face and an engagement feature, and the engagement feature can be shaped to extend through an opening in a saw blade. The flange can include an exterior mounting face and a recess, and the recess can be shaped to at least partially receive the engagement feature. The interior mounting face and the exterior mounting face can be configured to clamp the saw blade therebetween to mount the saw blade to a drive shaft of the circular saw. 1. An arbor for a circular saw , comprising:a coupler having an interior mounting face and an engagement feature, wherein the engagement feature is shaped to extend through an opening in a saw blade; anda flange having an exterior mounting face and a recess,wherein the recess is shaped to at least partially receive the engagement feature, andwherein the interior mounting face and the exterior mounting face are configured to clamp the saw blade therebetween to mount the saw blade to a drive shaft of the circular saw.2. The arbor of wherein the engagement feature has a hexagonal shape and the recess has a corresponding hexagonal shape configured to engage the engagement feature.3. The arbor of wherein the flange includes a cylindrical portion sized and configured for a close-fit with a corresponding inner wall of the engagement feature.4. The arbor of wherein the coupler includes an interior face spaced from the interior mounting face an axial distance between about 25 mm and about 45 mm.5. The arbor of wherein the flange includes a flange bore and the coupler includes a coaxial coupler bore claim 1 , and wherein the flange bore and the coupler bore are each configured to receive a bolt therethrough to secure the saw blade to the drive shaft.6. The arbor of wherein the flange bore is configured to receive a head of a bolt whereby the head does not extend ...

Подробнее
Номер записи: 28
08-02-2018 дата публикации

Blade Guard Having a Safety Feature

Номер: US20180036906A1
Автор: Frolov Andrew
Принадлежит:

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 ...

Подробнее
Номер записи: 29
12-02-2015 дата публикации

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

Номер: US20150040737A1
Автор: Fanning David A., Fulmer J. David, Gass Stephen F.
Принадлежит:

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 ...

Подробнее
Номер записи: 30
24-02-2022 дата публикации

SAW BLADE SHARPNESS MECHANISM

Номер: US20220055129A1
Автор: Heitsman Joshua C., Neumann Bryon P.
Принадлежит:

In accordance with an example embodiment, a saw blade sharpness mechanism for use on a tree sawing device, having a saw blade which rotates to saw trees. The saw blade dulls over time during normal operating conditions, and the speed of the saw blade decreases as the saw blade contacts the tree during sawing operation. The speed of the saw blade during sawing operations decreases more after repeated operations as the saw blade dulls. A sensor senses the speed of the saw blade. A processor receives inputs from the sensor and determines when the speed of the saw blade during tree sawing operation has decreased due to wear to a point that it would be more economical to replace the saw blade with a new sharper blade. When such condition is determined, the processor sends a signal to an indicator which sends a signal to the operator. 1. A saw blade sharpness mechanism for use on a tree sawing device , comprising:a saw blade which rotates to saw trees, the saw blade comprising a plurality of saw blade teeth that dull over time during normal operating conditions, a speed of the saw blade decreases as the saw blade contacts the tree during a sawing operation, and the speed of the saw blade during sawing operations decreases more after repeated sawing operations as the saw blade teeth become dull;an indicator that sends a signal to an operator;a sensor that senses the speed of the saw blade, and senses the decreasing speed of the saw blade during sawing operations; anda processor that receives an input from the sensor, the processor determines when the speed of the saw blade during the sawing operation has decreased due to wear to a point that it would be more economical to replace the saw blade teeth with new sharper saw blade teeth, and the processor sends a signal to the indicator to send the signal to the operator when such condition occurs.2. The mechanism of claim 1 , wherein the processor receives a blade cost input from one or more of a memory claim 1 , a lookup ...

Подробнее
Номер записи: 31
07-02-2019 дата публикации

TOOL DEVICE

Номер: US20190039145A1
Автор: BEK Fabian, Blickle Juergen, Bozic Milan, Delfini Stefano, Fellmann Willi, Grolimund Daniel, KLABUNDE Olaf, Luescher Bruno, Mathys Thomas, THOMASCHEWSKI Walter
Принадлежит: ROBERT BOSCH GMBH

The invention relates to a tool device which is suitable for use with a machine tool, in particular a hand guided machine tool, having a driving device moving, in particular in an oscillating manner, around a driving axis. The tool device has an attachment device which allows it to be fastened on a machine tool such that its driving axis and an axis of rotation of the tool substantially coincide. The attachment device, for absorbing the driving force, has at least two driving area regions, which are spaced apart from said tool axis of rotation and each has a plurality of surface points. The tangent planes to said surface-area points are inclined in regard to an axial plane, which encloses the tool axis of rotation. Furthermore, said tangent planes are inclined regard to a radial plane which extends perpendicularly to the tool axis of rotation. This means that the torque introduced into the tool device by the machine tool, via the driving device, is reliably absorbed. 1. A tool device , which is suitable for use with a machine tool having a driving device moving around a driving axis , the tool device having an attachment device by which the tool device is arranged to be fastened to a machine tool in such a manner that the driving axis and a tool axis of rotation are substantially coincident ,wherein, for receiving a driving force, the attachment device comprises at least two driving area regions each having a plurality of surface points and which are spaced apart to the tool axis of rotation,wherein tangent planes are inclined on the surface points in regard to an axial plane, which includes the tool axis of rotation,wherein the tangent planes are inclined in regard to a radial plane, which extends perpendicular to the tool axis of rotation,wherein the attachment device comprises a side wall,wherein the side wall extends radially spaced from the tool axis of rotation, the side wall extends between a first upper boundary plane and a second lower boundary plane, ...

Подробнее
Номер записи: 32
07-02-2019 дата публикации

Multi Saw Machine Modular Type System

Номер: US20190039258A1
Автор: LEE Chao-Ying
Принадлежит: SawMaster Diamond Tools, Inc.

A saw machine system includes a modular saw machine and a plurality of saw machine implements, wherein the modular saw machine is selectively coupled to the saw machine implements to transform one type of saw machine to another saw machine. By selectively coupling the modular saw machine to the saw machine implement, the saw machine system becomes one of a portable hand-held saw machine, a fixed cutting-head saw machine, and a cutting-head guide-by-rail saw machine. 1. A saw machine system , comprising:a modular saw machine which comprises a cutting tool guard, a driving motor coupled to said cutting tool guard and a cutting tool driven to rotate by said driving motor; anda plurality of saw machine implements, wherein said modular saw machine is selectively and detachably coupled to said saw machine implements to transform one type of saw machine to another saw machine.2. The saw machine system claim 1 , as recited in claim 1 , wherein one of said saw machine implements comprises a portable hand-held saw machine implement claim 1 , wherein said modular saw machine is detachably coupled to said portable hand-held saw machine implement to form a portable hand-held saw machine.3. The saw machine system claim 2 , as recited in claim 2 , wherein said portable hand-held saw machine implement comprises a skid for making cuts on a flat work piece when said skid is coupled to said modular saw machine claim 2 , wherein said skid has a flat bottom surface for laying on the flat work piece claim 2 , wherein a portion of said cutting tool is extended through said flat bottom surface of said bottom surface for making cuts of the flat work piece.4. The saw machine system claim 2 , as recited in claim 2 , wherein said portable hand-held saw machine implement comprises an anchor and guide strut mechanism for making circular cuts on a work piece claim 2 , wherein said anchor and guide strut mechanism comprises an anchor strut arranged for being coupled at the work piece to define a ...

Подробнее
Номер записи: 33
18-02-2016 дата публикации

System And Method For Kickback Detection In A Circular Saw

Номер: US20160046035A1
Автор: Bairampalli Sandeep, Laghate Gaurav Pradip, Ramaswamy Bharadwaja Maharshi
Принадлежит:

A method of detecting kickback during operation of a saw includes identifying with a controller in a saw a measured rotational speed of a rotating blade in the saw with reference to signals from a rotational rate sensor, identifying with the controller an estimated rotational speed of the rotating blade in the saw with reference to the measured rotational speed, at least one previously measured rotational speed, and a measurement of a previous change in rotational speed of the rotating blade, identifying with the controller an estimated torque force for a drive shaft of a motor in the saw that rotates the blade with reference to the measured rotational speed, and activating with the controller a blade arrest mechanism in response to a difference between the measured rotational speed and the estimated rotational speed exceeding a first threshold and the estimated torque force exceeding a second threshold. 1. A method of detecting kickback during operation of a saw comprising:identifying with a controller in a saw a measured rotational speed of a rotating blade in the saw with reference to signals from a rotational rate sensor;identifying with the controller an estimated rotational speed of the rotating blade in the saw with reference to the measured rotational speed, at least one previously measured rotational speed, and a measurement of a previous change in rotational speed of the rotating blade;identifying with the controller an estimated torque force for a drive shaft of a motor in the saw that rotates the blade with reference to the measured rotational speed; andactivating with the controller a blade arrest mechanism in response to a difference between the measured rotational speed and the estimated rotational speed exceeding a first threshold and the estimated torque force exceeding a second threshold.2. The method of claim 1 , the identification of the estimated torque force for the drive shaft of the motor further comprising:identifying with the controller an ...

Подробнее
Номер записи: 34
15-02-2018 дата публикации

Method and Apparatus for Verifying Length of Work Pieces

Номер: US20180043445A1
Автор: JR. DOUGLAS A., Ross, Ross Philip E.
Принадлежит:

An apparatus and method for ensuring the accuracy and utility of cut-to-length systems. Multiple channels of measurement are employed, by which a first channel of measurement produces a first measurement of a work piece taken between a cutting mechanism and a limit stopper. A second channel of measurement produces a second measurement, wherein cutting of the work piece by the cutting mechanism cannot be made unless the first measurement agrees with the second measurement. 1. An apparatus for ensuring the accuracy and utility of cut-to-length systems , comprising:a primary channel of measurement producing a first measurement of a work piece taken between a cutting mechanism and a limit stopper; anda second channel of measurement producing a second measurement, wherein cutting of the work piece by the cutting mechanism cannot be made unless the first measurement agrees with the second measurement.2. The apparatus of wherein if the first measurement does not agree with the second measurement claim 1 , then the cutting mechanism will be blocked from cutting the work piece.3. The apparatus of wherein the second channel of measurement comprises a sensor and a counter.4. The apparatus of wherein the sensor monitors both a vertical position and a horizontal position of the work piece and the counter determines if the first measurement and the second measurement agree.5. The apparatus of wherein the counter takes into account a plus/minus tolerance of the first measurement when determining if the first measurement and the second measurement agree.6. The apparatus of wherein the apparatus further comprises a primary mover system comprising a fixed vise to hold onto the work piece claim 1 , and an index vise to move the work piece towards the cutting mechanism.7. A method for ensuring the accuracy and utility of a cut-to-length system claim 1 , comprising:indexing a work piece with respect to a cutting mechanism to create a first measurement;monitoring a position of the work ...

Подробнее
Номер записи: 35
03-03-2022 дата публикации

POWER TOOL

Номер: US20220063054A1
Автор: Chen Liang, Fu Xiangqing, Hao Jingdong, Wu Shuming
Принадлежит:

A power tool includes an output shaft, an installation apparatus and a retention mechanism. The installation apparatus has an operation state and an installation state. The retention mechanism is capable of providing a retaining force that keeps the installation apparatus in the installation state. The retention mechanism includes a movable piece. The output shaft is formed with a guide rail that guides the movable piece to move. The movable piece is capable of moving along the guide rail to a first retention position and a second retention position. When the installation apparatus is in the installation state and receives a rotation force applied by the operation accessory, the rotation force causes the movable piece to move from the second retention position to the first retention position so that the installation apparatus is switched from the installation state to the operation state.

Подробнее
Номер записи: 36
25-02-2021 дата публикации

MACHINE TOOL

Номер: US20210053247A1
Автор: Chiu Chih-Hui
Принадлежит:

A machine tool includes a tool and a protective device. The tool includes a saw blade and a motor for driving the saw blade. An insulating member is arranged between the saw blade and the motor. The protective device includes a signal receiving unit, a control unit and a breaker. The signal receiving unit has an antenna receiving end that is in electrical contact with a middle region of the saw blade. The breaker is electrically connected between the motor and a utility power supply. The control unit is connected to the signal receiving unit and the breaker. The saw blade is used as an antenna by the signal receiving unit to receive an electromagnetic wave having the same frequency as that of a utility power from an environment, and the control unit controls the breaker according to a change of intensity in the electromagnetic wave. 1. A machine tool , comprising:a tool including a saw blade and a driving element, the saw blade being driven by the driving element; anda protective device including a signal receiving unit and a control unit, wherein the signal receiving unit is in electrical contact with the saw blade, and the control unit is connected to the signal receiving unit;wherein the saw blade is used as an antenna by the signal receiving unit to receive an electromagnetic wave from an environment, and the control unit controls the driving element according to a parameter of the electromagnetic wave;wherein when the control unit determines that the parameter of the electromagnetic wave is higher than a threshold value, the control unit controls the driving element to stop driving the saw blade.2. The machine tool according to claim 1 , wherein the signal receiving unit includes a wireless transmitting unit claim 1 , the wireless transmitting unit being configured to wirelessly transmit the parameter of the electromagnetic wave to the control unit.3. The machine tool according to claim 1 , wherein the control unit calculates a power intensity of the ...

Подробнее
Номер записи: 37
23-02-2017 дата публикации

POWER TOOL

Номер: US20170050291A1
Автор: AOKI Yonosuke
Принадлежит: MAKITA CORPORATION

A representative power tool has a spindle transmitting a motor driving force to a tool accessory, a tool accessory holding member movable between a holding position and a tool accessory releasing position, a lock mechanism movable between an engaging position for locking the tool accessory holding member in the holding position and a disengaging position for releasing the lock, an inner housing housed in a body housing and houses at least part of the lock mechanism, and an operation mechanism. The operation mechanism includes a handle part, a switching part that switches the lock mechanism between the engaging position and the disengaging position according to the handle part operation, and a switching connection part that is separated from the inner housing when the lock mechanism is placed in the engaging position and comes into contact with the inner housing when the lock mechanism is placed in the disengaging position. 1. A power tool , which performs a prescribed operation on a workpiece by driving a tool accessory , comprising:a body housing,a motor,a spindle that transmits a driving force of the motor to the tool accessory,a tool accessory holding member that is configured to be movable in spindle rotation axis direction between a holding position for holding the tool accessory and a releasing position for releasing the tool accessory,a lock mechanism that is configured to be movable between an engaging position for locking the tool accessory holding member in the holding position and a disengaging position for releasing the lock of the tool accessory holding member,an inner housing that is housed in the body housing and houses at least part of the lock mechanism, andan operation mechanism for operating the lock mechanism,the operation mechanism including:a handle part that is arranged outside of the body housing to be operated by a user,a switching part that is connected to the handle part and switches the lock mechanism between the engaging position and the ...

Подробнее
Номер записи: 38
23-02-2017 дата публикации

POWER TOOL

Номер: US20170050292A1
Автор: AOKI Yonosuke
Принадлежит: MAKITA CORPORATION

It is an object of the invention to increase the degree of freedom in designing a power tool. A representative power tool has a spindle that transmits a driving force of a motor to a tool accessory , a tool accessory holding member that is configured to be movable in a direction of a spindle rotation axis direction between a holding position for holding the tool accessory and a releasing position for releasing the tool accessory , a lock mechanism that locks the tool accessory holding member in the holding position, and a body housing . The lock mechanism is disposed between a second end of the spindle and a wall of the body housing in the spindle rotation axis direction 1. A power tool , which performs a prescribed operation on a workpiece by driving a tool accessory , comprising:a motor,a spindle that transmits a driving force of the motor to the tool accessory,a tool accessory holding member that is configured to be movable in a spindle rotation axis direction between a holding position for holding the tool accessory and a releasing position for releasing the tool accessory,a lock mechanism that engages with the tool accessory holding member in the holding position and locks the tool accessory holding member, anda body housing that forms at least part of an outer shell of the power tool, wherein:the spindle has a hollow shape and has a first end and a second end in the spindle rotation axis direction,the tool accessory holding member has a spindle inner region that is disposed inside the spindle, a tool accessory fastening region that protrudes from the first end and can be fastened to the tool accessory, and an engagement region that protrudes from the second end and can be engaged with the lock mechanism, andthe lock mechanism is disposed between the second end and a wall of the body housing in the spindle rotation axis direction.2. The power tool as defined in claim 1 , comprising a biasing member that is disposed between the second end and the lock mechanism ...

Подробнее
Номер записи: 39
15-05-2014 дата публикации

Guard Device For A Table Saw

Номер: US20140130643A1
Автор: Dammertz Ralph, Wiker Juergen
Принадлежит:

A guard device for a saw system in which the table saw is not operated without a saw blade guard, unless a user intends to make a non-through cut in a workpiece. The guard device, in one embodiment, determines whether an adjusted saw blade height corresponds to a thickness of the work piece to be cut and prevents the tool or motor driving the saw blade from operating if the saw blade is adjusted too high, in order to improve work conditions. 1. A saw including a saw blade for cutting a workpiece and a motor coupled to the saw blade , the motor having an on condition to move the saw blade for cutting the workpiece and an off condition in which the saw blade is not moved , the saw comprising:a table top defining an opening and including a work surface, the work surface configured to support the workpiece for movement along the table top toward the opening;a saw blade carriage configured to support the saw blade with respect to the table top;a workpiece detection system configured to detect the workpiece, the workpiece detection system including an emitter/detector configured to transmit a beam toward the workpiece, to detect one of the presence of a reflected signal from the workpiece indicative of the height of the workpiece and the absence of the reflected signal from the workpiece, and to transmit a workpiece height signal indicative of the detected one of the presence and absence of reflected signal from the workpiece, a processing unit operatively coupled to the emitter/detector, and a relay operatively coupled between the processing unit and the motor, wherein the processing unit is configured to provide a relay signal to the relay in response to the workpiece height signal, wherein the relay signal is configured to control movement of the saw blade.2. The saw of wherein the emitter/detector is fixedly coupled to one of a frame of the saw and the saw blade carriage.3. The saw of wherein the emitter/detector is located on one side of the work surface and the ...

Подробнее
Номер записи: 40
15-05-2014 дата публикации

CUTTING MACHINE AND EMERGENCY STOP METHOD OF MOTOR

Номер: US20140130645A1
Автор: Kawano Yoshikazu, Ozawa Hiromi, TAKANO Nobuhiro, Ushiwata Shigeharu
Принадлежит: HITACHI KOKI CO., LTD.

First, second and third sensors and emit electromagnetic waves, receive electromagnetic waves emitted by the first, second and third sensors and and reflected by an object or electromagnetic wave emitted by the object that received the electromagnetic waves emitted by the first, second and third sensors and , and specify distances between themselves and the object , respectively, based on time differences between emissions and receptions of the electromagnetic waves, and a control section specifies three-dimensional coordinates of the object based on the distances between the respective sensors , and and the object , determines whether or not the three-dimensional coordinate of the object falls within a predetermined region and stops a motor when the three-dimensional coordinates of the object falls within the region. 1. A cutting machine including a saw blade that cuts a workpiece being supported on a stand section and a motor for driving the saw blade , the cutting machine comprising:a coordinate-specifying section specifying coordinates of an object; anda stopping section stopping rotation of the motor when the coordinates specified by the coordinate-specifying section satisfy a predetermined condition.2. The cutting machine according to claim 1 ,wherein the coordinate-specifying section includes at least one sensor detecting a position of the object and the sensor is at least positioned substantially on an extension line of the saw blade.3. The cutting machine according to claim 1 ,wherein the coordinate-specifying section includes at least two sensors detecting a position of the object and the sensors positioned on both sides of the saw blade.4. The cutting machine according to claim 1 ,wherein the coordinate-specifying section measures distances from a plurality of different positions to the object to specify the coordinates of the object based on a measurement result.5. The cutting machine according to claim 1 ,wherein the coordinate-specifying section has a ...

Подробнее
Номер записи: 41
10-03-2022 дата публикации

An electrospindle

Номер: US20220072667A1
Автор: Saccardo Francesca
Принадлежит:

An electrospindle includes a motor for moving a tool and a motor shaft for transmitting motion from the motor to the tool. The electrospindle has a gripping head of the tool and a coupling of the tool to the motor shaft, and the gripping head includes two flanges, between which a portion of the tool and at least one thrust nut of a first flange can be interposed toward a counterflange, so as to hold the tool in position. The transmission has a free end threaded so as to receive the at least one thrust nut by screwing, the thread of the free end being double with a first right-handed thread and a second left-handed thread. 1. An electrospindle comprising:a motor for moving a tool; anda mechanical transmission for transmitting a motion from said motor to the tool; anda gripping head of the tool for coupling the tool to said mechanical transmission, said gripping head comprising at least two flanges adapted to grip a portion of the tool, a first flange of said at least two flanges being pushed against a counterflange of said at least two flanges by at least one thrust nut, so as to hold the tool in position,wherein said mechanical transmission has a free end threaded so as to receive said at least one thrust nut by screwing, a thread of said free end of said mechanical transmission being double by comprising a first right-handed thread and a second left-handed thread.2. The electrospindle according to claim 1 , wherein said at least one thrust nut comprises a first nut with a thread configured for coupling with said first thread of said free end of said mechanical transmission and a second nut with a thread configured for coupling with said second thread of said free end of said mechanical transmission.3. The electrospindle according to claim 2 , wherein said first nut and second nut comprise mutual coupling means.4. The electrospindle according to claim 1 , wherein said mechanical transmission comprises a motor shaft having a first end operatively coupled to said ...

Подробнее
Номер записи: 42
01-03-2018 дата публикации

Oscillating interface for an oscillating power tool

Номер: US20180056414A1
Автор: Jeremy Rubens, Saad Alam
Принадлежит: ROBERT BOSCH GMBH, Robert Bosch Tool Corp

An oscillating interface for an oscillating too includes a post, a pin which extends through the post, a flange slidably positioned on the post between the pin and a distal end of the post. The flange includes a drive side and a mounting side. The drive side includes a drive structure configured to interlock with a drive structure of an accessory tool. The mounting side is arranged facing the pin and defines at least one notch configured to receive the pin. A clamping member is configured to be threaded onto the post and to clamp the flange against the pin with the pin received in the notch.

Подробнее
Номер записи: 43
10-03-2016 дата публикации

Table Saw Riving Knife Mounting Arrangement

Номер: US20160067880A1
Автор: Frolov Andrew
Принадлежит:

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 ...

Подробнее
Номер записи: 44
09-03-2017 дата публикации

HANDHELD WORK APPARATUS

Номер: US20170066068A1
Автор: Hanussek Sebastian, Rieger Jan
Принадлежит:

A handheld work apparatus has a drive motor which drives a work tool in rotation via a belt drive. The belt drive has at least one first, driving pulley and at least one second, driven pulley. Between the first pulley and the second pulley there acts at least one drive belt for transmitting the drive torque. A second pulley is connected to the tool for conjoint rotation. The rotational speed of the second pulley is less than the rotational speed of the first pulley during operation. The work apparatus has a brake unit which acts on the first pulley. The belt drive includes at least one redirection roll. During braking, at least one redirection roll bears on the tight side of each drive belt which acts between the first pulley and the second pulley. This allows a simple structure and safe braking of the work tool. 1. A handheld work apparatus comprising:a work tool;a belt drive;a drive motor configured to drive said work tool via said belt drive;said belt drive having a first pulley configured as a driving pulley and a second pulley configured as a driven pulley;said belt drive further having a belt configured to act between said first pulley and said second pulley so as to transfer a drive moment;said second pulley being connected to said work tool in a rotationally fixed manner;said first pulley being configured to rotate at a first rotational speed during operation;said second pulley being configured to rotate at a second rotational speed during operation;said second rotational speed being less than said first rotational speed;a brake unit configured to act on said first pulley;said belt drive having a redirection roll;said belt having a tight side;said redirection roll being configured to contact said tight side of said belt during a braking event.2. The handheld work apparatus of claim 1 , wherein said redirection roll is held in a positionally fixed manner during operation.3. The handheld work apparatus of further comprising:a releasable fixation arrangement ...

Подробнее
Номер записи: 45
11-03-2021 дата публикации

LEVELLING APPARATUS FOR GANG SAWS

Номер: US20210069806A1
Автор: BERGEN Carrick, VOGT Nalynd
Принадлежит: Precision Guide Machinery and Repair Limited

A levelling apparatus for use in gang saws comprises first and second wedge portions. The first wedge portion comprises upper and lower surfaces, wherein the lower surface is nonparallel to the upper surface. The first wedge portion further comprises a plurality of openings for accepting mounting fasteners. The openings are arranged in a spaced, circular pattern about a centre of the first wedge portion. The second wedge portion also comprises upper and lower surfaces, wherein the upper surface is nonparallel to the lower surface. The second wedge portion further also comprises a plurality of openings for accepting the mounting fasteners. The second wedge openings correspond to the first wedge openings. Rotation of the first wedge portion with respect to the second wedge portion varies an angle between the first wedge upper surface and the second wedge lower surface, thereby allowing for angular adjustment. 1. A levelling apparatus for aligning a plurality of saw guides mounted on a guide post with respect to a plurality of saw blades mounted on an arbor in a gang saw using mounting fasteners , the apparatus comprising: a manifold channel adapted to accept the guide post therethrough; and', 'a plurality of manifold openings adapted to accept one or more of the mounting fasteners, the manifold openings arranged about the manifold channel;, 'a guide manifold supporting the plurality of saw guides, the guide manifold comprising first wedge upper and lower surfaces, wherein the first wedge upper surface is in contact with the guide manifold, and wherein the first wedge lower surface is nonparallel to the first wedge upper surface;', 'a first wedge channel adapted to accept the guide post therethrough; and', 'a plurality of first wedge openings adapted to accept one or more of the mounting fasteners, the first wedge openings arranged in a spaced pattern about the first wedge channel, wherein each of the first wedge openings define an angular offset with an adjacent first ...

Подробнее
Номер записи: 46
19-03-2015 дата публикации

SAFETY MECHANISMS FOR POWER TOOLS, INCLUDING KICKBACK DETECTION SYSTEM WITH TORQUE SENSOR

Номер: US20150075342A1
Автор: Buhrmann Frank, Butler Andy, COOPER Edward, Domeny Peter, Gilbert John, Lamb Brian, Lazzari Clinton, Schultz Eric Edward, SCOTT William, Tacklind Chris, TITZLER David
Принадлежит:

Various safety systems for power tools, and in particular table saws include detection systems for detecting a dangerous condition relative to a blade of the power tool, reaction systems for taking mitigation action in response to detection of a dangerous condition. The safety system may detect, prevent, and/or mitigate a dangerous condition associated with the power tool. 1. A table saw comprising:a cutting surface;a blade for cutting a workpiece on the cutting surface, wherein a portion of the blade is extendable above the cutting surface;a rotatable shaft positioned below the cutting surface, wherein the blade spins when the shaft rotates;a motor connected to the rotatable shaft for rotating the rotatable shaft; and a torque sensor connected to the rotatable shaft; and', 'a processor in communication with the torque sensor, wherein the processor is programmed to recognize a condition indicative of kickback of the workpiece during cutting of the workpiece based on input from the torque sensor., 'a kickback detection system for detecting kickback of the workpiece during cutting of the workpiece, wherein the kickback detection system comprises2. The table saw of claim 1 , further comprising a reaction means in communication with the kickback detection system for taking a mitigating reaction in response to detection of kickback of the workpiece by the kickback detection system during cutting of the workpiece.3. The table saw of claim 2 , wherein the torque sensor comprises a strain gauge torque sensor.4. The table saw of claim 2 , wherein the torque sensor comprises a surface acoustic wave torque sensor.5. Table saw of claim 2 , wherein the blade is mounted to the rotatable shaft.6. The table saw of claim 2 , further comprising:a clutch coupled to the rotatable shaft, such that when the clutch is engaged and the motor is running, the blade shaft is rotated; and a brake system for braking the blade; and', 'a motor shut-down circuit connected to the clutch and the ...

Подробнее
Номер записи: 47
19-03-2015 дата публикации

SAFETY MECHANISMS FOR POWER TOOLS, INCLUDING MAGNETORHELOGICAL BRAKE FOR BLADE

Номер: US20150075343A1
Автор: Buhrmann Frank, Butler Andy, COOPER Edward, Domeny Peter, Gilbert John, Lamb Brian, Lazzari Clinton, Schultz Eric Edward, SCOTT William, Tacklind Chris, TITZLER David
Принадлежит:

Various safety systems for power tools, and in particular table saws include detection systems for detecting a dangerous condition relative to a blade of the power tool, reaction systems for taking mitigation action in response to detection of a dangerous condition. The safety system may detect, prevent, and/or mitigate a dangerous condition associated with the power tool. 1. A table saw comprising:a cutting surface;a motor-driven rotatable shaft positioned below the cutting surface;a blade for cutting a workpiece on the cutting surface, wherein the blade spins when the shaft rotates, and wherein a portion of the blade is extendable above the cutting surface;a detection system for detecting a dangerous condition relative to the blade;a reaction system in communication with the detection system for taking a reaction in response to detection of the dangerous condition, wherein the reaction system comprises a magnetorheological rotary brake connected to the shaft that brakes the shaft to thereby brake the spinning of the blade in response to detection of the dangerous condition by the detection system.2. The table saw of claim 1 , wherein the blade is mounted on the rotatable shaft3. The table saw of claim 1 , wherein the magnetorheological rotary brake comprises:a rotor fixed to the shaft;a housing, wherein the housing and the rotor define a spacing;magnetorheological fluid in the spacing; anda magnetic field-producing coil that is energized in response to detection of the dangerous condition by the detection system to produce a magnetic field that causes the magnetorheological fluid to increase its viscosity to brake the rotor, thereby braking the shaft, thereby braking the blade.4. The table saw of claim 3 , wherein the blade is mounted on the rotatable shaft.5. The table saw of claim 1 , further comprising a kickback detection system for detecting kickback of the workpiece during cutting of the workpiece.6. The table saw of claim 5 , wherein the reaction means ...

Подробнее
Номер записи: 48
19-03-2015 дата публикации

POWER TOOLS

Номер: US20150075830A1
Автор: Pang Xiaoli, Wu Yu, Xu Jingtao, Zhang Shisong
Принадлежит:

The invention relates to a power tool with a quick-operated locking mechanism. The power tool comprises a housing, an output shaft configured to mount and drive a working head and provided with a carrier extending out of the housing, a fixer configured to fix the working head at the carrier of the output shaft, a locking mechanism configured to lock or release the fixer and a driving mechanism configured to move the locking mechanism between a locking position and a releasing position, while in the locking position, the fixer is clamped fixedly on the output shaft, and while in the releasing position, the fixer is released from the output shaft. The distance between the locking mechanism and the carrier of the output shaft keeps constant in the locking position to prevent slippage of the fixer and ensure the working head firmly fixed. 1. A power tool , comprising:a housing;an output shaft being configured to oscillate about an axis in a reciprocating way and used for mounting and driving a working head, the output shaft is provided with a carrier extending out of the housing;a fixing element comprising a pressing portion for fixing the working head at the carrier of the output shaft;a driving mechanism being configured to shift between a first mating position and a second mating position, when the driving mechanism is in the first mating position, the pressing portion of the fixing element presses the working head, when the driving mechanism is in the second mating position, the pressing portion of the fixing element releases the working head;the driving mechanism comprises a driving unit and a mating unit, the driving unit and the mating unit are capable of moving relative to each other, the fixing element is configured to move axially by moving the driving unit and to be axially fixed by supporting of the driving unit or mating unit in the first mating position.2. The power tool according to claim 1 , wherein rotary movement of the driving unit relative to the ...

Подробнее
Номер записи: 49
05-06-2014 дата публикации

Power Tool Including an Accessory

Номер: US20140150269A1
Автор: Dennis Powell
Принадлежит: ROBERT BOSCH GMBH, Robert Bosch Tool Corp

A power tool includes a motor, a foot plate, a detent system, and an accessory. The motor is configured to move a saw blade in a repeating pattern of movement. The foot plate defines a saw blade opening and includes a guide surface that defines a storage space. The detent system is supported by the foot plate and has a detent member. The accessory defines (i) a first detent structure configured to receive the detent member therein, and (ii) a second detent structure configured to receive the detent member therein. The accessory is positionable between (i) a use position in which the accessory is spaced apart from the foot plate, and (ii) a storage position in which the accessory is located in the storage space.

Подробнее
Номер записи: 50
07-03-2019 дата публикации

POSITIONING DEVICE FOR A MITER SAW

Номер: US20190070678A1
Автор: CHEN Chun-Hung, Huang Chih-Yung
Принадлежит: P & F BROTHER INDUSTRIAL CORPORATION

A positioning device for a miter saw includes a working table, an elastic member, and a lever member. The elastic member has a movable portion adapted to be adjacent to a scale disc of the miter saw, and a protruding portion. The lever member is disposed in the working table, and has a linking portion connected to the movable portion, and a handle portion movable to convert the elastic member from a locking state for engaging the protruding portion with one of notches in a scale disc of the miter saw so that the working table is non-rotatable, to a releasing state for moving the movable portion away from the scale disc so that, the protruding portion is disengaged from the one of the notches to permit rotation of the working table. 1. A positioning device adapted for use in a miter saw , the miter saw including a base seat and a scale disc that is disposed on the base seat , and that is formed with a plurality of notches , said positioning device comprising:a working table including a main portion that is adapted to be disposed above and connected rotatably to the base seat, and a mounting portion that extends in an extending direction from a side periphery of said main portion; a fixing portion that is connected fixedly to said working table,', 'a movable portion that is opposite to said fixing portion and that is adapted to be adjacent to the scale disc, and', 'a protruding portion that is connected to said movable portion, and that is adapted to removably engage one of the notches of the scale disc; and, 'an elastic member having'} a linking portion that is connected to said movable portion of said. elastic member, and', 'a handle portion that is opposite to said linking portion, said handle portion of said lever member being movable to convert said elastic member from a locking state for engaging said protruding portion of said elastic member with the one of the notches so that said working table is non-rotatable relative to the base seat, to a releasing state ...

Подробнее
Номер записи: 51
07-03-2019 дата публикации

Apparatus and Method for Automated Blade Change for Tissue Saw

Номер: US20190070744A1
Автор: Chike Matthew J., GUSSERT Cory P., Spinelli Stefano, Zahn Jonathon T.
Принадлежит:

A blade storage array is detachably mountable with a tissue log cutting saw. The saw has a cutting arm with a tool holder receptacle adapted and configured to hold a circular saw blade for the saw. The array has a plurality of storage units. Each storage unit is adapted and configured to store a circular saw blade for the saw. Each storage unit has a tool holder receptacle adapted and configured to hold a circular saw blade. Each storage unit is adapted and configured to move perpendicularly to the saw blade center axis. 1. A blade storage array for a tissue log cutting saw , wherein the saw has a cutting arm with a tool holder receptacle adapted and configured to hold a circular saw blade for the saw , the circular saw blade being rotatable about a center axis on the saw cutting arm , the blade center axis being generally parallel to a direction of travel of the tissue log through the saw , the array being adapted and configured to detachably mount to a structure of the saw , the array having a plurality of storage units , each storage unit being adapted and configured to store a circular saw blade for the saw , each storage unit having a tool holder receptacle adapted and configured to hold a circular saw blade , each storage unit being adapted and configured to move perpendicularly to the saw blade center axis.2. The array of wherein the array is adapted and configured to move in a direction generally parallel to the saw blade center axis.3. The array of wherein each storage unit is adapted and configured to move independently of another storage unit in the array.4. The array of wherein each storage unit is movable between a retracted position wherein the storage unit is within the array and an extended position wherein the storage unit is extended outward from the array.5. The array of claim 4 , wherein when the storage unit is in the extended position claim 4 , the tool holder receptacle of the storage unit is exposed to receive a tool holder associated with ...

Подробнее
Номер записи: 52
07-03-2019 дата публикации

WORK APPARATUS AND METHOD FOR OPERATING THE SAME

Номер: US20190070746A1
Автор: Hanussek Sebastian, Zuercher Lukas
Принадлежит:

A work apparatus has a drive motor and a work tool driven in a rotating manner by the drive motor. The work tool is at least partially covered by a protective hood which is mounted pivotably about the rotational axis of the work tool. A control unit is provided for controlling at least one component of the work apparatus. The work apparatus has a detection unit for detecting at least one position of the protective hood. The control unit is configured for controlling the at least one component of the work apparatus depending on the detected position of the protective hood. In a method for operating a work apparatus, the detection unit detects at least one position of the protective hood and supplies the information to the control unit. The control unit activates the at least one component depending on the detected position of the protective hood. 1. A work apparatus comprising:a drive motor;at least one work tool configured to be driven in a rotating manner by said drive motor;a protective hood;said work tool defining a rotational axis and being at least partially covered by said protective hood;said protective hood being mounted pivotably about said rotational axis of said work tool;a control unit configured to control at least one component of the work apparatus;a detection unit configured to detect a position of said protective hood; and,said control unit being configured to control the at least one component of the work apparatus in dependence upon the detected position of said protective hood.2. The work apparatus of claim 1 , wherein said control unit is configured to reduce a rotational speed of said work tool in dependence upon the position of said protective hood that is detected by said detection unit.3. The work apparatus of claim 2 , wherein said control unit is configured to reduce the rotational speed of said work tool during an opening of said protective hood.4. The work apparatus of claim 2 , wherein said detection unit is configured to detect when ...

Подробнее
Номер записи: 53
16-03-2017 дата публикации

HANDHELD WORK APPARATUS

Номер: US20170072482A1
Автор: Hanussek Sebastian, Rieger Jan
Принадлежит:

A handheld work apparatus has a drive motor which drives a work tool rotationally via a belt drive. The belt drive has a first, driving pulley and a second, driven pulley. The second pulley is connected fixedly to the work tool so as to rotate therewith. The rotational speed of the second pulley is lower during operation than that of the first pulley. A brake unit acts on the belt drive. A first drive belt of a first stage and a second drive belt of a second stage act between the pulleys to transfer the drive torque. The belts each bring about a rotational speed reduction. The belt drive includes a redirection roll which bears against the belt, via which the highest drive torque is transmitted during operation. As a result, a braking operation of the work tool is enabled independently of the rotational speed of the tool. 1. A handheld work apparatus comprising:a work tool;a belt drive;a drive motor configured to drive said work tool via said belt drive;said belt drive having a first pulley configured as a driving pulley and a second pulley configured as a driven pulley;said second pulley being connected to said work tool in a rotationally fixed manner;said first pulley being configured to rotate at a first rotational speed;said second pulley being configured to rotate at a second rotational speed;said second rotational speed being less than said first rotational speed;a first drive belt configured to act between said first pulley and said second pulley so as to transfer a drive torque for a first drive stage;a second drive belt configured to act between said first pulley and said second pulley so as to transfer a drive torque for a second drive stage;said first drive stage and said second drive stage each being configured to effect a rotational speed reduction;said second drive belt being guided over said second pulley;said belt drive further having at least one redirection roll configured to contact at least one of said first drive belt and said second drive belt;a ...

Подробнее
Номер записи: 54
16-03-2017 дата публикации

Power equipment with detection and reaction systems

Номер: US20170072582A1
Автор: Stephen F. Gass
Принадлежит: SD3 LLC

Woodworking machines and safety methods for use with those machines are disclosed. The machines include a detection system adapted to detect one or more dangerous conditions and a reaction system associated with the detection system. The reaction system can include an explosive to trigger the system, and also can be configured to retract a cutting tool at least partially away from a cutting region upon detection of a dangerous condition by the detection system.

Подробнее
Номер записи: 55
05-03-2020 дата публикации

Circular Saw Cutting Machine

Номер: US20200070267A1
Автор: NISHIJIMA Yutaka
Принадлежит:

A circular saw cutting machine () includes a machine main body (), an articulated robot (), and a cutter stocker (). A circular saw () is secured and interposed by a cutter clamp cylinder (CYL) between a front end face () of the main spindle () and a cutter presser piece () with pins () inserted in pin insertion holes (). When removing the circular saw (), a hydraulic is switched over to cause the cutter clamp cylinder (CYL) to perform unclamping so that the cutter presser piece () can be pulled out of the main spindle (). When the articulated robot () performs cutter change, a main spindle motor (M) and a brake () are controlled based on the rotation angle detected by a spindle stop position sensor (SE) to stop the main spindle () in a predetermined home angle condition. 1. A circular saw cutting machine comprising:a main spindle, a main spindle motor, and a power transmission mechanism, a frame movably guided on a guide rail between a cutting position and a withdrawal position under the transfer control of a transfer motor, and a cutter mount mechanism for mounting a circular saw on a mounting shaft provided at a top end of the main spindle in so that the circular saw integrally rotates with the main spindle without rotationally shifting relative to the main spindle;wherein the circular saw includes a mounting hole through which the mounting shaft can be inserted and a plurality of pin insertion holes equidistantly arranged in concentric positions around a center of the mounting hole,wherein the cutter mount mechanism comprises:a pull-in fixing mechanism including a cutter presser piece mounted to interpose the circular saw between the cutter presser piece and a front end face of the main spindle, a plurality of pins capable of being inserted through the pin insertion holes of the circular saw in concentric positions around a center of the mounting shaft of the main spindle, a plurality of pin holes into which the plurality of pins can be inserted, wherein each ...

Подробнее
Номер записи: 56
12-03-2020 дата публикации

SAW BLADE STABILIZER AND METHOD

Номер: US20200078877A1
Автор: Goellner Willy
Принадлежит: ADVANCED MACHINE & ENGINEERING CO.

A saw blade stabilizer is provided. The saw blade stabilizer includes a housing and a shaft at least partially within a cavity of the housing. A piston is connected to one end of the shaft. A mechanical wedge is connected to a second end of the shaft in the housing. A stabilizer contact element slideably receives a portion of the mechanical wedge. Movement of the piston slides the portion of the mechanical wedge within the stabilizer contact element and moves the stabilizer contact element in a first direction not in line with the movement of the piston. 1. A saw blade stabilizer comprising:a housing;a shaft at least partially within a cavity of the housing;a piston connected to one end of the shaft;a mechanical wedge connected to a second end of the shaft in the housing;a stabilizer contact element slideably receiving a portion of the mechanical wedge;wherein movement of the piston slides the portion of the mechanical wedge within the stabilizer contact element and moves the stabilizer contact element in a first direction not in line with the movement of the piston.2. The saw blade stabilizer of claim 1 , wherein the portion of the mechanical wedge is a slide protrusion claim 1 , the slide protrusion slideably received in a channel of the stabilizer contact element.3. The saw blade stabilizer of claim 2 , wherein the shaft defines a shaft central longitudinal axis claim 2 , the slide protrusion and the channel both extending obliquely relative to the shaft central longitudinal axis.4. The saw blade stabilizer of claim 3 , wherein the oblique extension of the slide protrusion in the channel prevents movement of the stabilizer contact element in a second direction opposite the first direction.5. The saw blade stabilizer of claim 2 , wherein movement of the piston away from the stabilizer contact element moves the slide protrusion within the channel and moves the stabilizer contact element in the second direction opposite the first direction.6. The saw blade ...

Подробнее
Номер записи: 57
12-03-2020 дата публикации

SAFETY SYSTEM FOR A MACHINE TOOL

Номер: US20200080688A1
Автор: BLEICHER Friedrich, CAUDR Helmut, WEILER Thomas
Принадлежит:

A safety system is provided for a machine tool, having a tool, having a clamping device, arranged movably on a frame of the machine tool, for the tool. The clamping device is movable by a movement device from a working position, in which the tool can be used for working and in which the tool poses a risk of injury to a user, into a safety position, in which the tool poses substantially no risk of injury to the user. The movement device has at least two equally or oppositely magnetized and/or magnetizable magnetic means, of which at least a first magnetic means is connected to or arranged on the tool and at least one second magnetic means is connected to or arranged on the frame, such that the movement of the tool by the movement device from the working position into the safety position can be triggered and/or at least partially performed by magnetic force. 1. A safety system for a machine tool having a tool , a clamping device arranged moveably on a frame of the machine tool for the tool , wherein the clamping device is moveable by a motion device from a working position , in which the tool can be used for working and entails a risk of injury to a user by the tool , into a safety position in which there is substantially no risk of injury to the user by the tool , whereinthe motion device has at least two equally or oppositely magnetized and/or magnetizable magnetic means, of which at least a first magnetic means is connected to the tool or is arranged thereon and at least a second magnetic means is connected to the frame or arranged thereon, so that the movement of the tool by the motion device out of the working position into the safety position can be triggered and/or at least partially implemented by means of magnetic force.2. The safety system as set forth in wherein the motion device has a holding device by which the tool is held in the working position by a holding force.3. The safety system as set forth in claim 2 , wherein the holding force is applied at ...

Подробнее
Номер записи: 58
29-03-2018 дата публикации

Adjustment and Control Features for a Power Tool

Номер: US20180085837A1
Автор: Jan Koegel, Marin Assaliyski, Michael Luginbill
Принадлежит: ROBERT BOSCH GMBH, Robert Bosch Tool Corp

Improvements to a table saw include a system for automatically adjusting the height of the cutting blade in relation to the height of the workpiece, a system for providing fine adjustment of the height or bevel angle of the saw blade or work surface, and a system for automatic speed control and shut-off for the saw blade.

Подробнее
Номер записи: 59
21-03-2019 дата публикации

ELECTRIC ROTARY TOOL WITH BRAKING

Номер: US20190084107A1
Автор: YABUGUCHI Michisada
Принадлежит:

A rotary tool or machine includes: an output shaft; a motor that rotates the output shaft; an operation part for commanding driving/stopping of the motor; and a control unit that controls the driving/stopping of the motor in accordance with commands from the operation part. The control unit is configured to generate a braking force in the motor or on the output shaft when the motor is to be stopped in proportion to a tightening force (torque) applied to the tool accessory when the motor is started up, such that the greater the tightening force (torque), the greater the braking force. 1. An electric rotary tool comprising:an output shaft configured such that a tool accessory is mountable thereon by a threaded connection;a motor that directly or indirectly rotates the output shaft;an operation part for generating drive/stop commands for the motor; anda control unit that controls the driving/stopping of the motor in part based upon the drive/stop commands from the operation part;wherein the control unit is configured to cause a braking force to be generated in the motor and/or to be applied to the output shaft when the motor is to be stopped, the control unit variably setting the braking force in proportion to an amount of torque applied to the threaded connection as a result of acceleration of the output shaft during startup of the motor, such that the greater the torque applied to the output shaft during the startup of the motor, the greater the braking force generated or applied during braking control executed by the control unit.2. The electric rotary tool according to claim 1 , further comprising:a rotational speed setting part configured to variably set a target rotational speed when the motor is being driven to perform a processing operation;wherein the control unit is configured to control the braking force while the motor is being stopped in proportion to the target rotational speed that was set by a user using the rotational speed setting part.3. The electric ...

Подробнее
Номер записи: 60
21-03-2019 дата публикации

Portable Sawmill

Номер: US20190084178A1
Автор: Lucas Warren Geoffrey
Принадлежит: Pilot Pastoral Co. Pty. Ltd.

A sawmill includes a four-stroke internal combustion engine having an output shaft for driving a sawblade. The output shaft has a longitudinal axis. The engine is mounted on the sawmill for rotation between a first operative position with the longitudinal axis of the output shaft extending at a first angle, and a second operative position with the longitudinal axis of the output shaft extending at a second angle transversely to the first angle. The engine has fuel injection to facilitate operation in the first and second operative positions and a lubrication system incorporating a wet sump. An oil pick up for the lubrication system is configured to pick up oil from the wet sump at both the first and second operative positions. 1. A sawmill including:an engine or motor having an output shaft for driving a sawblade, the output shaft having a longitudinal axis;a support apparatus for supporting the engine or motor, the support apparatus including a support framework, the engine or motor configured to selectively pivot relative to a portion of the support framework between a first operative position with the longitudinal axis extending at a first angle, and a second operative position with the longitudinal axis extending at a second angle different to the first angle,the support apparatus further including a pivot body pivotably mounting the engine or motor to said portion of the support framework, the pivot body including:pivot portions for pivotable mounting of the pivot body about a pivot axis to said portion of the support framework;a mounting portion to which the engine/motor is secured, the mounting portion surrounding the output shaft; anda housing portion to accommodate the output shaft exited from the engine/motor.2. The sawmill as claimed in claim 1 , wherein the pivot body including the pivot portions claim 1 , the mounting portion and the housing portion is a unitarily formed cast part.3. The sawmill as claimed in claim 1 , wherein the mounting portion is ...

Подробнее
Номер записи: 61
31-03-2016 дата публикации

SYSTEM AND METHOD FOR KICKBACK DETECTION BASED ON BLADE SPEED IN A POWER TOOL

Номер: US20160089810A1
Автор: HUBER Brett, Padmanabhan Deepak
Принадлежит:

A method of detecting and mitigating kickback in a saw includes identification of a running average speed (RPM) of a saw blade, the speed at a given time sample relative to the running average speed, the percentage change in speed from one speed sample to the previous speed sample, and the percentage change in average speed based on the current speed of the saw blade. If the identified speed profile from the samples indicates a kickback is imminent, then the saw identifies an imminent kickback event and removes power from the saw motor to mitigate kickback. 1. A method of operating a power saw , comprising:using a sensor to output a signal indicative of a rotation speed of a saw blade as the saw blade is being operated;using a controller to sample the output signal to determine the rotation speed of the saw blade at a predetermined sampling rate;after each sample of the output signal, determining a current average blade speed, the current average blade speed corresponding to an average of the rotation speed indicated by a current sample of the output signal with the rotation speeds indicated by a predetermined number of previous samples of the output signal;after determining the current average blade speed, comparing the current average blade speed with a previous average blade speed, the previous average blade speed corresponding to the current average blade speed calculated for a previous sample of the output signal; anddetecting whether a kickback event of the saw blade has occurred based on the comparison of the current average blade speed to the previous average blade speed.2. The method of claim 1 , wherein the predetermined sampling rate is at least 1 sample per millisecond.3. The method of claim 2 , wherein the predetermined number of samples is at least 100.4. The method of claim 3 , wherein the predetermined number of samples is at least 400.6. The method of claim 5 , wherein the first predetermined percentage difference threshold value is at least 0.003%. ...

Подробнее
Номер записи: 62
30-03-2017 дата публикации

Surgical Cutting Instrument With Near-Perimeter Interlocking Coupling Arrangement

Номер: US20170086856A1
Автор: Boykin Christopher M., Tidwell Durrell
Принадлежит:

A blade coupling mechanism for a hand-held surgical cutting instrument includes a first coupling member including a first blade-contacting surface and a first outer perimeter sidewall adjacent the first blade contacting surface. It also includes a second coupling member including a second blade-contacting surface facing the first blade-contacting surface of the first coupling member. The second coupling member includes a second outer perimeter sidewall adjacent the second blade contacting surface. The second blade-contacting surface and the second outer perimeter sidewall meet to define an outer edge. The second coupling member including a bore through the second blade contacting surface. The bore and the second blade contacting surface meeting to define an inner edge. Blade-engaging protrusions project from at least one of the first and second blade-contacting surfaces. The protrusions are spaced closer to the outer edge than the inner edge. 1. A surgical cutting blade for use in cutting bone , the cutting blade comprising:a distal end portion having a plurality of cutting teeth;a shank portion extending from the distal end portion along a longitudinal axis; and a partially circular outer perimeter positioned about a center point defined by the bulbous head,', 'a slot extending inwardly along the longitudinal axis and formed by a funnel shaped opening defined by two opposed edges radially extending toward the center point to a semi-circular slot edge concentric with the outer perimeter, and', 'a plurality of openings formed into the outer perimeter., 'a proximal end portion extending from the shank portion, the proximal end portion defined by a bulbous head having,'}2. The surgical cutting blade of claim 1 , wherein the two opposed edges define an angle of about 90° to about 120°.3. The surgical cutting blade of claim 1 , wherein the two opposed edges are each substantially straight with rounded edges at each end to provide a smooth transition to the outer ...

Подробнее
Номер записи: 63
30-03-2017 дата публикации

TABLE SAW GUARD

Номер: US20170087738A1
Автор: "OBanion Michael L.", AGRONIN Michael L., AYALA Adan, Bascom James P., BERRY Robert Alan, Ceroll Warren A., Horky John K., HUSTON Todd J., JR. Andrew E., JR. Robert J., Miller Philip T., Opsitos, Parks James R., Puzio Daniel, Seman, WEBSTER Matthew C., Welsh Robert P.
Принадлежит:

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 ...

Подробнее
Номер записи: 64
19-03-2020 дата публикации

Blade Guard Having a Safety Feature

Номер: US20200086523A1
Автор: Andrew Frolov
Принадлежит: ROBERT BOSCH GMBH, Robert Bosch Tool Corp

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.

Подробнее
Номер записи: 65
05-04-2018 дата публикации

TOOL FOR REMOVING A GRINDING OR POLISHING PLATE

Номер: US20180093362A1
Автор: VALENTINI Guido
Принадлежит:

The present invention relates to a tool () for releasing a connection between a grinding or polishing plate and a support plate of a grinding or polishing device, which connection is based on a hook-and-loop fabric. 1. Tool for releasing a connection between a grinding or polishing plate and a support plate of a grinding or polishing device , which connection is based on a hook-and-loop fabric , comprising a grip portion by means of which the tool can be manually gripped by a user , and a separation portion which is designed to be inserted between the grinding or polishing plate and the support plate in order to remove said plates from one another , wherein the separation portion has a rounded tip.2. Tool according to claim 1 , wherein the separation portion is rounded off.3. Tool according to claim 1 , wherein the separation portion is flat.4. Tool according to claim 1 , wherein the separation portion has a thickness which is smaller than the thickness of the grip portion.5. Tool according to claim 1 , wherein the separation portion has a thickness which decreases from the end of the separation portion that is on the grip portion side towards the tip of the separation portion.6. Tool according to claim 1 , wherein the separation portion has a first narrow side and a second narrow side claim 1 , the first narrow side extending such that it is outwardly curved and the second narrow side extending such that it is inwardly curved.7. Tool according to claim 6 , wherein the first narrow side has a smaller thickness than the second narrow side.8. Tool according to claim 1 , wherein that the tip of the separation portion is arranged so as to be laterally offset from a longitudinal axis of the tool.9. Tool according to claim 1 , wherein an element which is detachably or irremovably connected to the tool is arranged in the region of the grip portion.10. Tool according to claim 9 , wherein that the element which is detachably or irremovably connected to the tool comprises a ...

Подробнее
Номер записи: 66
28-03-2019 дата публикации

OSCILLATING MULTI-TOOL SYSTEM

Номер: US20190091888A1
Автор: Doberstein Emily, Thorson Troy C., Wackwitz Jeffrey M., Wekwert James
Принадлежит:

A power tool includes a housing and a motor disposed in the housing. The motor has an axial face and a motor shaft extending from the axial face. The power tool also includes a spindle driven by the motor about an output axis, a motor plate having a central opening defining an inner surface of the motor plate, and a tolerance ring coupled to the inner surface of the motor plate. The tolerance ring has deformable waves. The motor plate is coupled to the motor by engagement of the deformable waves with the motor to take up tolerances between the motor plate and the motor. 120-. (canceled)21. A power tool , comprising:a housing;a motor disposed in the housing, the motor having an axial face and a motor shaft extending from the axial face;a spindle driven by the motor about an output axis;a motor plate having a central opening defining an inner surface of the motor plate;a tolerance ring coupled to the inner surface of the motor plate, the tolerance ring having deformable waves, wherein the motor plate is coupled to the motor by engagement of the deformable waves with the motor to take up tolerances between the motor plate and the motor.22. The power tool of claim 21 , wherein the motor plate engages a boss on the motor.23. The power tool of claim 21 , wherein the motor plate is spaced no closer than 0.020 inches from the axial face of the motor.24. The power tool of claim 21 , further comprising:an eccentric shaft coupled to the motor shaft; anda motor plate bearing disposed between the eccentric shaft and the motor plate such that the eccentric shaft is supported during rotation.25. The power tool of claim 24 , wherein the eccentric shaft includes a body portion receiving the motor shaft and an eccentric portion extending from the body portion claim 24 , wherein the motor plate bearing is disposed on an outer surface of the body portion of the eccentric shaft.26. The power tool of claim 24 , further comprising a fork for converting rotational motion of the eccentric ...

Подробнее
Номер записи: 67
03-07-2014 дата публикации

Saw Device with Detection System

Номер: US20140182430A1
Автор: Haldar Arindam
Принадлежит:

A power tool includes a swing arm movable along a swing arm path, an actuating assembly configured to transfer a force to the swing arm, a control system configured to control the actuating assembly to transfer a force to the swing arm, and a detection system configured to detect the operability of the actuating assembly. 1. A saw device , comprising:a swing arm movable along a swing arm path between a first swing arm position and a second swing arm position;an actuating assembly configured to transfer a force to the swing arm resulting in a bias on the swing arm in a direction toward the swing arm position;a control system configured to control the actuating assembly; anda detection system configured to detect the operability of the actuating assembly without activating the actuating assembly.2. The saw device of claim 1 , wherein the control system is configured such that power is not provided to a motor of the saw device when the detection system outputs a signal indicating that the actuating assembly is not operable.3. The saw device of claim 2 , wherein:the actuating assembly includes a pyrotechnic module;the detection system includes a comparator block;the comparator block is configured to generate a first output when the pyrotechnic module is installed in the actuating assembly;the comparator block is configured to generate a second output when the pyrotechnic module acts as an open or is not installed in the actuating assembly;the comparator block is configured to generate a third output when the pyrotechnic module acts as a short in the actuating assembly; andeach of the first output, the second output, and the third output is different from the other of the first output, the second output, and the third output.4. The saw device of claim 3 , wherein the comparator block comprises:a first comparator;a first voltage reference operably connected to the first comparator;a second comparator; anda second voltage reference operably connected to the second ...

Подробнее
Номер записи: 68
03-07-2014 дата публикации

Tool chucking device

Номер: US20140182873A1
Автор: Bruno Luescher, Marcel Fankhauser
Принадлежит: ROBERT BOSCH GMBH

A tool chucking device, in particular an oscillation tool chucking device, includes a tool holder that has a first form locking element and a second form locking element. The form locking elements are provided at least for a form locking connection to a machining tool in a circumferential direction about a rotational machining axis. The form locking elements are mounted rotatably with respect to each other at least relative to a rotational axis that is oriented at least substantially parallel to the rotational machining axis and/or are mounted movably with respect to each other along at least one movement axis that is oriented at least substantially perpendicular relative to an axis that is parallel to the rotational machining axis.

Подробнее
Номер записи: 69
23-04-2015 дата публикации

Tool Holder

Номер: US20150108725A1
Автор: Albrecht Kreissig, Bruno Luescher, Tobias Waibel, Ulrich Mueller-Boysen
Принадлежит: ROBERT BOSCH GMBH

A tool holder, particularly a hand-held power tool holder, is provided for an oscillating and/or rotational drive of at least one insertion tool. The tool holder includes at least one holder-side fastening element that is provided at least substantially for a coupling with the at least one insertion tool. The tool holder also includes at least one bearing unit provided for movably mounting the at least one holder-side fastening element in a movement at least partially deviating from an axial direction. The movement at least partially deviating from the axial direction of the at least one fastening element is provided at least substantially for creating a fastening force in the axial direction.

Подробнее
Номер записи: 70
20-04-2017 дата публикации

Apparatus For Fixing Knife Plate Of Saw Machine

Номер: US20170106456A1
Автор: Liao Hui-Lan
Принадлежит:

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 ...

Подробнее
Номер записи: 71
30-04-2015 дата публикации

Polishing apparatus, method for attaching polishing pad, and method for replacing polishing pad

Номер: US20150118944A1
Автор: Eiji Hirai, Kaoru Hamaura, Ryuichi Kosuge, Soichi Isobe, Suguru Ogura, Tadakazu Sone, Takeshi Sakurai
Принадлежит: Ebara Corp

The work of replacing a polishing pad is easily performed, and thermal damage is prevented from occurring in a polishing table. A polishing apparatus 100 includes a polishing table 110 having an attachment surface 110 a to which a polishing pad 108 used to polish a substrate 102 is attached. The polishing apparatus 100 also includes a silicone layer 111 provided on the attachment surface 110 a of the polishing table 110 and interposed between the polishing table 110 and the polishing pad 108 . By interposing the silicone layer 111 , it is possible to easily detach and attach the polishing pad 108 . In addition, since a heat treatment for coating the silicone layer 111 on the polishing table 110 is performed at a relatively low temperature, it is possible to prevent thermal damage from occurring in the polishing table 110 due to the heat treatment.

Подробнее
Номер записи: 72
09-06-2022 дата публикации

DUAL-SPINDLE CIRCULAR SAW FOR SAWING WOOD

Номер: US20220176581A1
Автор: Häupl Christian
Принадлежит:

A dual-spindle circular saw () for sawing wood () with two saw groups () is proposed, wherein each saw group () comprises a drive () having an armature () and a stator () for rotary driving of a saw spindle () which is mounted in a housing () and which is connected in a rotationally fixed manner to at least one saw tool () comprising at least one exchangeable circular saw blade (), and wherein the center distance (A) of the saw spindles () is adjustable by means of an actuator. In order to create particularly advantageous design conditions, it is proposed that the armature () is arranged in a rotationally fixed manner on the saw spindle () and the stator () is arranged in a rotationally fixed manner in the housing () between a fixed bearing () and a floating bearing () of the saw spindle (), wherein the saw tool () is floatingly mounted on the saw spindle (). 1. A dual-spindle circular saw for sawing wood , said saw comprising:two saw groups, wherein each saw group has a drive having an armature and a stator providing rotary driving of a saw spindle that is mounted in a housing and that is connected in a rotationally fixed manner to a saw tool comprising exchangeable circular saw blades, andwherein an actuator provides adjustment of a center distance of the saw spindles,wherein the armature is rotationally fixed on the saw spindle and the stator is rotationally fixed in the housing between a fixed bearing and a floating bearing of the saw spindle, andwherein the saw tool is floatingly mounted on the saw spindle.2. A dual-spindle circular saw according to claim 1 , wherein the saw tool comprises a circular saw blade group interchangeably supported on a tool clamp claim 1 , wherein the tool clamp is detachably fastened via a quick-change cone to the saw spindle claim 1 , which has a corresponding counterpart in the form of a conical axle stub.3. A dual-spindle circular saw according to claim 2 , wherein the tool clamp is secured with a screw connection that extends ...

Подробнее
Номер записи: 73
18-04-2019 дата публикации

Transmission Device For a Table Saw

Номер: US20190111504A1
Автор: Kao Mei-Lan
Принадлежит:

A transmission device is adapted for use in a table saw, and includes a bracket and a lifting seat that is movably mounted to the bracket. The transmission device includes a motor, a speed reduction unit, and a saw blade unit. The motor is adapted to be mounted to the lifting seat and has a rotatable central shaft. The speed reduction unit is adapted to be mounted to the lifting seat, is connected to the central shaft, and is driven rotatably by the motor. The saw blade unit includes an output shaft adapted for connection to the lifting seat, extending along a second axis, and driven by the speed reduction unit, and a blade member connected co-rotatably to the output shaft, and having a portion that is adapted to be received in the bracket. 1. A transmission device adapted for use in a table saw , the table saw including a machine seat , a bracket that is mounted to the machine seat , a lifting seat that is movably mounted to the bracket , and a driving unit that is connected to the bracket and the lifting seat , and that is operable to drive vertical movement of the lifting seat , said transmission device comprising:a motor adapted to be mounted to the lifting seat, and having a central shaft that extends rotatably along a first axis;a speed reduction unit adapted to be mounted to the lifting seat, connected to said central shaft, and driven rotatably by said motor; and an output shaft that is adapted for connection to the lifting seat, that extends along a second axis, and that is driven rotatably by said speed reduction unit, and', 'a blade member that is connected co-rotatably to said output shaft, and that has a portion adapted to be received in the bracket., 'a saw blade unit including'}2. The transmission device as claimed in claim 1 , wherein a vertical distance between the first axis of said central shaft and the second axis of said output shaft ranges from 40 millimeters to 50 millimeters.3. The transmission device as claimed in claim 2 , wherein the first ...

Подробнее
Номер записи: 74
09-04-2020 дата публикации

CONTROL SYSTEMS FOR POWER TOOLS

Номер: US20200108522A1
Автор: Gass Stephen F., Slamka Louis R.
Принадлежит: SawStop Holding LLC

Control systems are disclosed for power tools such as table saws, miter saws, band saws, hand-held circular saws, jointers, shapers, routers, and up-cut saws. The control systems include systems to turn power tools on and off, and to control the supply of power to motors. The systems to turn power tools on and off may include dual switches that must be operated together to turn a power tool on. The systems to provide power to motors may include dual relays in series implemented with methods to minimize arcing and welding of the relays. The systems described herein may be implemented in power tools equipped with active injury mitigation technology. 1. A method for shutting off an electric motor in a power tool used by a user , where the power tool has a switch , a microprocessor , a first relay , and a second relay in series with the first relay , where the first and second relays are part of a circuit to provide AC power to the motor and where the circuit includes an AC line , the method comprising:the user triggering the switch, where triggering the switch sends a signal to the microprocessor to turn off the motor;the microprocessor, upon receipt of the signal, breaking contact in the first relay when the AC line is approaching a zero-crossing;the microprocessor checking whether AC power to the motor has been shut off;if AC power to the motor has been shut off, the microprocessor breaking contact in the second relay; andif AC power to the motor has not been shut off, the microprocessor breaking contact in the second relay when the AC line is approaching a zero-crossing.2. The method of claim 1 , further comprising the microprocessor disabling subsequent activation of the motor if AC power to the motor was not shut off after opening of the first relay.3. A method for starting an electric motor of a power tool used by a user claim 1 , where the power tool has a switch claim 1 , a microprocessor claim 1 , a first relay claim 1 , and a second relay in series with the ...

Подробнее
Номер записи: 75
05-05-2016 дата публикации

METHOD AND APPARATUS TO TEST AN AUTOMATIC STOP SAFETY FEATURE OF A ROTARY SAW

Номер: US20160121512A1
Автор: He Fan, JIANG Hai, Tabaddor Mahmood
Принадлежит:

A test apparatus for testing of a stop mechanism on a saw includes a support arm movable relative to a blade of the saw from a first position to a second position. The test apparatus also includes a simulation member coupled to the support arm. In the first position, the first end of the simulation member is offset from a portion of the blade of the saw, and in the second position, the first end of the simulation member is adapted to be in contact with the portion of the blade of the saw. The test apparatus further includes circuitry operatively connected to the simulation member to replicate an electrical property of a human finger such that contact between the blade and the first end of the simulation member triggers the stop mechanism of the saw. 1. A test apparatus for the testing of a stop mechanism of a saw , the test apparatus comprising:a support arm movable relative to a blade of the saw from a first position to a second position;a simulation member coupled to the support arm, the simulation member having a first end and a second end, wherein in the first position, the first end of the simulation member is adapted to be offset from a portion of the blade of the saw, and in the second position, the first end of the simulation member is adapted to be in contact with or immediately adjacent to the portion of the blade of the saw; andcircuitry operatively connected to the simulation member, wherein the circuitry and simulation member cooperate to replicate an electrical property or a thermal property of a human finger such that contact or near contact between the blade and the first end of the simulation member when the support arm is in the second position triggers the stop mechanism of the saw.2. The test apparatus of claim 1 , wherein the electrical property is an impedance of the simulation member claim 1 , wherein the impedance of the simulation member is identical or substantially identical to an impedance of a human finger.3. The test apparatus of claim ...

Подробнее
Номер записи: 76
25-08-2022 дата публикации

FLOOR SAW WITH BLADE GUARD

Номер: US20220266470A1
Автор: Gilson Alejandro, Hart Michael R., Hoppa Steven P., II Charles Moody, Kinnison Andrew, Wacker
Принадлежит:

A powered saw assembly includes a base having a top surface, a column fixed to the top surface, and a guide rail supported above the top surface. The assembly includes a saw unit translatable along the guide rail, the saw unit including a rotating arbor to which a saw blade is attachable for co-rotation therewith. A blade guard at least partially surrounds the saw blade and defines an opening through which the saw blade is movable for attaching or removing the saw blade relative to the arbor. A cover is movably coupled to the blade guard to selectively close the opening. With the cover moved away from the blade guard to expose the opening, the saw blade is attachable or removable relative to the arbor through the opening without passing the saw blade through the slot. 1. A powered saw assembly for cutting a work piece , the assembly comprising: a planar top surface on which the work piece to be cut is supported and an opposite bottom surface, and', 'a slot extending from the top surface to the bottom surface;, 'a base including'}a column fixed to the top surface of the base;a guide rail supported above the top surface by the column; and a rotating arbor to which a saw blade is attachable for co-rotation therewith,', 'a blade guard at least partially surrounding the saw blade and defining an opening through which the saw blade is movable for attaching the saw blade to the arbor and removing the saw blade from the arbor,', 'a cover movably coupled to the blade guard to selectively close the opening;', 'a motor housing; and', 'an electric motor positioned within the motor housing and operably coupled to the arbor to provide torque thereto, causing the arbor to rotate,, 'a saw unit translatable along the guide rail relative to the base, the saw unit including'}wherein, with the cover moved away from the blade guard to expose the opening, the saw blade is attachable to the arbor through the opening without passing the saw blade through the slot from the bottom surface of ...

Подробнее
Номер записи: 77
31-07-2014 дата публикации

Table Saw Guard

Номер: US20140208904A1
Автор: "OBanion Michael L.", AGRONIN Michael L., AYALA Adan, Bascom James P., BERRY Robert Alan, Ceroll Warren A., Horky John K., HUSTON Todd J., JR. Andrew E., JR. Robert J., Miller Philip T., Opsitos, Parks James R., Puzio Daniel, Seman, WEBSTER Matthew C., Welsh Robert P.
Принадлежит: BLACK & DECKER INC.

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 ...

Подробнее
Номер записи: 78
21-05-2015 дата публикации

Detachable Protective Device for a Table Saw

Номер: US20150135923A1
Автор: Chih Hung Liao
Принадлежит: Individual

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.

Подробнее
Номер записи: 79
11-05-2017 дата публикации

OSCILLATING MULTI-TOOL SYSTEM

Номер: US20170129123A1
Автор: Doberstein Emily, Thorson Troy C., Wackwitz Jeffrey M., Wekwert James
Принадлежит:

A power tool having a housing, a motor, a tool holder driven about an output axis by the motor, and an output element for performing an operation on a workpiece. The tool holder has a locating feature including a tapered portion becoming narrower in a direction away from the surface of the tool holder. The output element has an aperture for receiving the locating feature and a face facing the surface of the tool holder when the locating feature is received. The power tool also includes a flange for transferring a clamping force for urging the output element towards the tool holder and a tab projecting from the flange for finger tightening the flange. A biasing member provides the clamping force toollessly. A gap is defined between the surface of the tool holder and the face when the tapered portion of the locating feature is fully received in the aperture. 1. A power tool comprising:a housing;a motor disposed within the housing;a tool holder driven about an output axis by the motor, the tool holder having a locating feature projecting from a surface of the tool holder, wherein the locating feature includes a tapered portion becoming narrower in a direction away from the surface of the tool holder;an output element for performing an operation on a workpiece, the output element having an aperture for receiving the locating feature of the tool holder to mate with the tool holder, wherein the output element includes a first face that faces the surface of the tool holder when the locating feature is received by the aperture and a second face generally opposite the first face;a rotatable flange for transferring a clamping force for urging the output element towards the tool holder, wherein the flange includes a tab projecting from the flange for finger-tightening the flange, wherein the tab is operatively coupled to rotate the flange; anda biasing member providing the clamping force toollessly;wherein a gap is defined between the surface of the tool holder and the first ...

Подробнее
Номер записи: 80
31-07-2014 дата публикации

METHOD OF PRODUCING A CIRCULAR SAW BLADE HAVING COOLING CHANNELS

Номер: US20140212318A1
Автор: Friedrichs Arno
Принадлежит:

A method is of producing a circular saw blade having cooling channels. In that case, placing of a plurality of thread-shaped bodies on a first circular disc of plastic material is carried out in such a manner that each of the thread-shaped bodies is oriented in radial direction. A second circular disc of plastic material is then placed on the first disc and the thread-shaped bodies. Subsequently, pressure is exerted on the second disc in the direction of the first disc. Removal of the plate-shaped bodies from the compressed disc pair is thereafter carried out, whereby cooling channels are created. Finally, sintering of the disc pair in order to obtain a circular saw blade having cooling channels running in radial direction is carried out. 1. Method of producing a circular saw blade having cooling channels , comprising the following steps:{'b': 3', '1, 'placing a plurality of thread-shaped bodies () on a first circular disc () of plastic material in such a manner that each of the thread-shaped bodies is oriented in radial direction,'}{'b': '2', 'placing a second circular disc () of plastic material on the first disc and the thread-shaped bodies,'}exertion of pressure (P) on the second disc in the direction of the first disc for formation of the compressed disc pair,{'b': '3', 'removal of the thread-shaped bodies () from the compressed disc pair and'}{'b': '5', 'sintering of the disc pair to obtain a circular saw blade having cooling channels () running in radial direction.'}2. Method according to claim 1 , wherein the plastic material is hard metal powder provided with a plasticiser claim 1 , ceramic powder provided with a plasticiser or steel powder provided with plasticiser.33. Method according to claim 1 , wherein the thread-shaped bodies () consist of a material which volatilises on application of a high temperature and that the removal of the thread-shaped bodies from the compressed disc pair is carried out by application of the high temperature.43. Method ...

Подробнее
Номер записи: 81
01-09-2022 дата публикации

Machine tool

Номер: US20220274227A1
Автор: Helmut Hummel
Принадлежит: Hilti AG

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

Подробнее
Номер записи: 82
01-09-2022 дата публикации

CUTTING DEVICE

Номер: US20220274280A1
Автор: "OKeefe Fraser Thomas", Elkington Michael James, Loch Andrew, McMinn William
Принадлежит: Frelk Industries Pty. Ltd.

A cutting device for cutting a pipe having a pipe wall includes an elongate carrier having a tool end which is engageable with a power tool, and a free end. The device includes a guide wheel located at the free end of the carrier, which is mounted thereon for rotation relative thereto, having a bearing surface extending parallel to a longitudinal axis of the carrier. The device also includes a cutting element having a peripheral cutting edge which is located adjacent to the guide wheel being positioned intermediate the guide wheel and the tool end. The cutting element is of greater transverse dimension than the guide wheel so that when the bearing surface bears against an internal surface of the pipe the distance between the cutting edge of the cutting element and the bearing surface enables the cutting element to cut through the pipe wall. 1. A cutting device for cutting through a sidewall of a pipe from an inside of the pipe , said cutting device comprising:(i) an elongate carrier having a shaft, said shaft having a longitudinal axis, an attaching formation defined at a tool end of the elongate carrier for being received in a gripping element of a power tool, and said elongate carrier having a free end;(ii) a guide wheel being rotatably attached to the free end of the carrier such that the guide wheel may rotate freely relative to said shaft and such that said shaft does not extend past a lower edge of said guide wheel, said guide wheel having an axis of rotation that is co-axial with the longitudinal axis of the shaft of the elongate carrier, said guide wheel having a bearing surface extending parallel to the longitudinal axis of said shaft, the bearing surface of the guide wheel for bearing against an inner surface of the pipe and for extending parallel to a longitudinal axis of the pipe, in use when cutting the pipe; and(iii) a cutting disc fixedly attached to the carrier, the cutting disc having a peripheral cutting edge, and the cutting disc being located ...

Подробнее
Номер записи: 83
07-08-2014 дата публикации

POWER TOOL, SUCH AS A PORTABLE CIRCULAR SAW, HAVING IMPROVED BRAKING AND COOLING

Номер: US20140215839A1
Автор: Abe Kenji, HIRATA Yusuke, NAGAHAMA Tatsuya
Принадлежит: MAKITA CORPORATION

A power tool, for example, a portable circular saw, includes a fan, a motor configured to rotate the fan, an output part or shaft driven by the motor, a motor housing that houses the motor, a grip housing connected to the motor housing, a trigger associated with the grip housing, and a brake member configured to brake a rotation of the motor, the brake member being mounted inside the grip housing. The brake member may be a resistive element of a rheostatic braking system. The housing and fan are configured such that cooling air is directed to cool the brake member. 1. A power tool comprising:a fan;a motor configured to rotate the fan;an output part driven by the motor;a motor housing housing the motor;a grip housing connected to the motor housing;a trigger associated with the grip housing; anda brake member configured to brake a rotation of the motor, the brake member being mounted inside the grip housing.2. The power tool according to claim 1 , wherein the brake member comprises a resistive element of a rheostatic braking system.3. The power tool according to claim 2 , including an airflow path in the power tool leading from the fan past the brake member.4. The power tool according to claim 3 , including an exhaust port in the grip housing at a downstream end of the airflow path.5. A power tool comprising:a fan;a motor configured to rotate the fan;an output part driven by the motor;a housing for housing the motor and including a grip;a trigger associated with the grip;a battery holding part associated with the housing; anda brake member configured to brake a rotation of the motor, the brake member being provided inside the housing.6. The power tool according to claim 5 , wherein the brake member comprises a resistive element of a rheostatic braking system.7. The power tool according to claim 6 , including an airflow path in the power tool leading from the fan past the brake member.8. The power tool according to claim 7 , including an exhaust port in the housing at ...

Подробнее
Номер записи: 84
07-08-2014 дата публикации

KICKBACK DETECTION SYSTEM

Номер: US20140216220A1
Автор: Mehta Amit, Wiker Juergen
Принадлежит:

A method of detecting a kickback event for a table saw includes operatively connecting a stress sensor to the table saw that is configured to detect a characteristic of a work component of the table saw, the work component being coupled to a workpiece being cut by the table saw during a cutting operation. The stress sensor outputs stress signals indicative of the characteristic of the work component. A speed of the saw blade is then controlled based on the stress signals. 1. A method of detecting a kickback event for a table saw , the table saw including a motor having an arbor shaft for driving a saw blade , the method comprising:operatively connecting a stress sensor to the table saw, the stress sensor being configured to detect a characteristic of a work component of the table saw, the work component being coupled to a workpiece being cut by the table saw during a cutting operation;outputting stress signals from the stress sensor indicative of the characteristic of the work component; andcontrolling a speed of the saw blade based on the stress signals.2. The method of claim 1 , further comprising:comparing the characteristic indicated by the stress signals to a threshold value for the characteristic; andadjusting the speed of the saw blade based on the comparison.3. The method of claim 2 , wherein the threshold value corresponds to a value of the characteristic during a kickback event.4. The method of claim 3 , wherein adjusting the speed comprises reducing the speed of the motor in response to the characteristic indicated by the stress signals exceeding the threshold value.5. The method of claim 3 , wherein adjusting the speed comprises actuating a braking mechanism for stopping the saw blade in response to the characteristic indicated by the stress signals exceeding the threshold value.6. The method of claim 1 , wherein the stress sensor comprises a deflection sensor for indicating a deflection of the work component from a normal position.7. The method of claim ...

Подробнее
Номер записи: 85
18-05-2017 дата публикации

Saw

Номер: US20170136652A1
Автор: Bettacchini Marcello, Ginocchini Lucio, Mortaro Matteo
Принадлежит:

A saw with a pivotal guard which can pivot from a first position surrounds at least a portion of the lower edge of the saw blade to a second retracted position where the portion of the lower edge of the saw blade is exposed. A biasing mechanism may be provided for biasing the pivotal guard towards the first position. A pivotal guard actuating mechanism is capable of moving the pivotal guard from the first position to the second retracted position. The pivotal guard actuation mechanism includes a hand lever, a cam mechanism comprising a cam and cam follower connected between the hand lever and the pivotal guard wherein the cam is connected to the pivotal guard and the cam follower is connected to the hand lever. 1. A saw comprising:a base assembly;a cutting unit pivotably mounted on the base assembly to allow the cutting unit to pivot towards or away from the base assembly,a circular saw blade rotationally mounted on the cutting unit which can be rotationally driven by a motor;a fixed guard mounted on the cutting unit which surrounds at least a portion of the upper edge of the saw blade;a pivotal guard pivotally mounted on the cutting unit which can pivot from a first position, where it surrounds at least a portion of the lower edge of the saw blade to a second retracted position where the portion of the lower edge of the saw blade is exposed;a biasing mechanism which biases the pivotal guard towards the first position; a hand lever pivotally mounted on the cutting unit;', 'a cam mechanism comprising a cam and cam follower connected between the hand lever and the pivotal guard wherein the cam is connected to the pivotal guard and the cam follower is connected to the hand lever;, 'a pivotal guard actuating mechanism which is capable of moving the pivotal guard from the first position to the second retracted position, the pivotal guard actuation mechanism comprisingwherein the biasing mechanism urges the cam into engagement with the cam follower;wherein pivotal ...

Подробнее
Номер записи: 86
30-04-2020 дата публикации

PIPE CUT-OFF TOOL AND ACCESSORIES FOR SUCH TOOLS

Номер: US20200130075A1
Автор: BULLOCK Seth, Chartier Glen R., CHAVAN Vijay Raghunath, CHHATRE Krishnarjun B., Dakare Sachin Shashikant, FESKANICH, HALL Katherine, JR. Lawrence, KRUEPKE Scott, MASKE Sachin Moreshwar, Nanche Rahul Maruti, Patil Prasad Chatursingh, PATIL Sandeep Sidagouda, SKRJANC Robert, ZINE Santosh Shivaji
Принадлежит:

Power tools such as cutting saws with rotary powered blades are described. Also described are various accessories for tools used with cylindrical workpieces such as pipes are described. The accessories include a clamp and saw joint assembly, various quick connection assemblies between a saw and a clamping system, a plunge guide assembly, a latch plate assembly, an interlock switch, a blade guard system, and a chip management system or chip deflector. Also described are related methods of use. 1. A powered cut-off tool comprising:an electric motor;a rotary cutting blade driven by the motor;control provisions for selectively adjusting operation of the motor; (i) an alignment plate for use in a plunge guide assembly,', '(ii) a latch plate assembly for use in a quick connection assembly,', '(iii) an interlock system,', '(iv) a blade guard system,', '(v) a chip management system, and', '(vi) combinations of (i)-(v)., 'at least one feature selected from the group consisting of2. The powered cut-off tool of wherein the saw comprises feature (i) claim 1 , the alignment plate adapted to slidably engage a grooved guide of the plunge guide assembly.3. The powered cut-off tool of wherein the saw comprises feature (ii) claim 1 , the latch plate assembly including a positionable latch plate provided on the saw claim 1 , the latch plate defining a concave cutout claim 1 , the saw including a receiving aperture claim 1 , wherein upon insertion of a quick connect pin in the receiving aperture claim 1 , the concave cutout of the latch plate engages the quick connect pin.4. The powered cut-off tool of wherein the saw comprises feature (iii) claim 1 , the interlock system including an electrical switch and a receiving aperture in the saw claim 1 , wherein upon insertion of a quick connect pin in the receiving aperture claim 1 , the electrical switch is closed to thereby allow operation of the saw.5. The powered cut-off tool of wherein the saw comprises feature (iv) claim 1 , the blade ...

Подробнее
Номер записи: 87
10-06-2021 дата публикации

METHOD FOR MACHINING PLATE MATERIAL BY USING LINEAR SAW AND NUMERICAL CONTROL SAW MACHINE APPARATUS

Номер: US20210170510A1
Автор: CHI Yihui
Принадлежит: DONGGUAN CITY YISONG HIGH TECHNOLOGY CO., LTD.

Provided are a method for machining a plate material by using a linear saw, and a numerical control saw machine apparatus. The numerical control saw machine apparatus includes: two carrying mechanisms, which are connected to two ends of a linear saw respectively; at least one control motor, configured for adjusting a distance between the two carrying mechanisms; and a pair of vibration motors, configured for driving the vibration of the linear saw, wherein, the distance between the two carrying mechanisms is adjusted by the control motor based on a monitored change in a torque of the control motor. 1. A method for machining a plate material by using a linear saw , comprising:monitoring tensile forces on two ends of the linear saw by monitoring torque of a servo motor configured for controlling tensile forces on two ends of the linear saw, when machining the plate material with the linear saw,quickly fine-tuning and reducing a distance between the two ends of the linear saw and enable the torque of the servo motor to be restored to or maintained within a preset range, when it is monitored that the torque of the servo motor increases or becomes more than a preset threshold,quickly fine-tuning and increasing the distance between the two ends of the linear saw and enable the torque of the servo motor to be restored to or maintained within the preset range, when it is monitored that the torque of the servo motor decreases or becomes smaller than another preset threshold.2. The method according to claim 1 , wherein claim 1 , the torque of the servo motor is preset to enable the tensile forces on two ends of the linear saw to be as close as possible to a maximum tensile force that makes tensile strength of the linear saw reach a maximum value.3. The method according to claim 1 , wherein claim 1 , a relative position of the two carrying mechanisms respectively connected to two ends of the linear saw is adjusted by the servo motor to adjust the distance between the two ends ...

Подробнее
Номер записи: 88
24-05-2018 дата публикации

ROLLING MECHANISM OF A TRANSMISSION SHAFT IN A WOOD-WORKING MACHINE

Номер: US20180141232A1
Автор: Chang Chih-Chou
Принадлежит:

A rolling mechanism of a transmission shaft in a wood-working machine is disclosed. A power mechanism provides the transmission shaft with a rotational force and is inside a box which is pivoted with a stabilizing rod to position a stabilizing plate. The rolling mechanism includes two plates and a positioning ring. The positioning ring is combined on the transmission shaft and rotates along with the transmission shaft. An outer periphery of the positioning ring is a concaved ring, and outer peripheries of the plates enter into the concaved ring so that the plates are clipped. An inner ring of the positioning ring positions the transmission shaft. By the plates of the stabilizing plate, the positioning ring of the transmission shaft rotates smoothly and is supported stably. The plates are outside the positioning ring and are assembled and dismantled easily. 1. A rolling mechanism of a transmission shaft in a wood-working machine , with that a power mechanism provides the transmission shaft with a rotational force , the power mechanism is assembled inside a box , the box is pivoted with a stabilizing rod , the stabilizing rod positions a stabilizing plate , the stabilizing plate is provided with a web space , the rolling mechanism provides for connection with a saw blade and the transmission shaft , a positioning ring is combined on the transmission shaft and rotates along with the transmission shaft; wherein the rolling mechanism comprises:two plates which are movable mounted at two ends of the web space with rivet pins, with the plates being in a circular shape; andthe positioning ring, with that an outer periphery of the positioning ring is provided with a concaved ring, outer peripheries of the plates enter into the concaved ring so that the plates are clipped, and an inner ring of the positioning ring provides for positioning the transmission shaft.2. The rolling mechanism of a transmission shaft in a wood-working machine according to claim 1 , wherein an inner ...

Подробнее
Номер записи: 89
02-06-2016 дата публикации

SAFETY DEVICE FOR POWER CUTTING TOOLS

Номер: US20160151931A9
Автор: NIICHEL WILLIAM
Принадлежит:

A system of safety devices is disclosed for use in connection with powered cutting tools, including but not limited to table saws, miter saws, jointers, shapers and routers. The devices include a right hand push device adapted to slide along the fence of a table saw, shaper, router or jointer, a dual bearing hold down device to secure a work piece in at least three directions and adapted for use with a table saw, shaper, router or jointer, an anti-kickback device to secure a work piece after a cut is made and while cutting continues and adapted for use with a table saw, shaper, router or jointer, a left hand hold down device for securing a work piece on the side of a cutting blade opposite that of a fence and adapted for use with a table saw, shaper, router or jointer, and a hold down device adapted for use with miter saws. Each of the devices, alone and in combination, protect the operator of the power tools from serious injury from the cutting tool and from work piece kickback. 1. An anti-kickback safety device adapted for use with a powered cutting tool , the power cutting tool having a planer work surface , comprising:a. A frame adapted to be secured to the cutting tool;b. A hold down arm pivotally connected to the frame and extending outwardly from the frame, the hold down arm having a proximal end and a distal end;c. Bearing means disposed at the distal end of the hold down arm; andd. Biasing means applying a force to the proximal end of the hold down arm to push the bearing means in a vertical downward direction.2. The anti-kickback device of claim 1 , wherein the biasing means comprises a shaft rotatably interconnected with the frame claim 1 , with one end of the shaft interconnected to the proximal end of the hold down arm claim 1 , and a spring operatively associated with the shaft to apply a rotational biasing force to the shaft.3. The anti-kickback device of claim 2 , further comprising a rotatable collar surrounding a length of the shaft claim 2 , the ...

Подробнее
Номер записи: 90
16-05-2019 дата публикации

ACCESSORIES FOR OSCILLATING POWER TOOLS

Номер: US20190143473A1
Автор: Covell Kevin W., Lee David B., Lombardo Rachel A., MILLER Mark D., MONTPLAISIR Sarah J.
Принадлежит:

An accessory for use with an oscillating power tool includes an attachment portion having a first planar member, a second planar member parallel to the first planar member, a central opening defined in one of the first planar member and the second planar member, a keyed sidewall disposed at least partially around the central opening and extending from the first planar member to the second planar member transverse to the first planar member and to the second planar member, and a plurality of equiangularly spaced recesses defined in one of the first planar member and the second planar member, the recesses spaced apart from the keyed sidewall and not in communication with the central opening. A working portion may be couplable to the attachment portion and configured to perform an operation on a workpiece. 1. An accessory for use with an oscillating power tool comprising:an attachment portion having a first planar member, a second planar member parallel to the first planar member, a central opening defined in one of the first planar member and the second planar member, a keyed sidewall disposed circumferentially around an entirety of the central opening and extending from the first planar member to the second planar member transverse to the first planar member and to the second planar member, and a plurality of equiangularly spaced recesses defined in one of the first planar member and the second planar member, the recesses spaced apart from the keyed sidewall and not in communication with the central opening; anda working portion couplable to the attachment portion and configured to perform an operation on a workpiece,wherein the keyed sidewall comprises a plurality of adjacent V-shaped wall portions, each V-shaped wall portion composed of a pair of wall portions that converge at an outer point as they extend radially outward from the central opening and that are joined at a first inner point to an first adjacent pair of V-shaped wall portions and at a second inner ...

Подробнее
Номер записи: 91
17-06-2021 дата публикации

METHOD AND APPARATUS FOR CARRYING OUT THE REPLACEMENT OF AN ABRASIVE ELEMENT IN A MACHINE FOR WORKING SURFACES

Номер: US20210178549A1
Автор: Bosio Luca, Ferretti Luca, Valleggi Renzo
Принадлежит: Fabrica Machinale S.R.L.

An apparatus () for carrying out the replacement of an abrasive element () in a machine () for finishing surfaces, comprises a support body () configured to reversibly engage the abrasive element (). The support body () and the abrasive element () provide, at respective engagement surfaces (), mutual engagement members of removable type () configured to move from an engagement position to a disengagement position by rotating about a rotational axis () in a first sense of rotation e, from the disengagement position to the engagement position, by rotating about the rotational axis () in a second sense of rotation opposite to the first one. The apparatus furthermore, comprises a displacement device () for moving the support body () in the space according to at least 1 degree of freedom. The apparatus (), furthermore, provides at least a removal station () for removing an abrasive element () from the support body (), or at least an application station () for engaging an abrasive element () to the support body (). 2116261626151025101626152516261626aabbaabb. Apparatus () claim 1 , according to claim 1 , wherein said mutual engagement members ( claim 1 ,) provide a threaded hole ( claim 1 ,) at one between said engagement surface () of said support body () and said engagement surface () of said abrasive element () claim 1 , and a threaded shaft ( claim 1 ,) at the other engagement surface ( claim 1 ,) claim 1 , said threaded hole ( claim 1 ,) and said threaded shaft ( claim 1 ,) configured to provide a threaded connection;3116261626151025101626152516261626aabbaabb. Apparatus () claim 1 , according to claim 1 , wherein said mutual engagement members ( claim 1 ,) provide a shaped hole (′ claim 1 ,′) at one between said engagement surface () of said support body () and said engagement surface () of said abrasive element () claim 1 , and a shaped shaft (′ claim 1 ,′) at the other engagement surface ( claim 1 ,) claim 1 , said shaped hole (′ claim 1 ,′) and said shaped shaft (′ ...

Подробнее
Номер записи: 92
17-06-2021 дата публикации

Apparatus and Method for Automated Blade Change for Tissue Saw

Номер: US20210178626A1
Автор: Chike Matthew J., GUSSERT Cory P., Spinelli Stefano, Zahn Jonathon T.
Принадлежит:

A blade storage array is detachably mountable with a tissue log cutting saw. The saw has a cutting arm with a tool holder receptacle adapted and configured to hold a circular saw blade for the saw. The array has a plurality of storage units. Each storage unit is adapted and configured to store a circular saw blade for the saw. Each storage unit has a tool holder receptacle adapted and configured to hold a circular saw blade. Each storage unit is adapted and configured to move perpendicularly to the saw blade center axis. 1. A blade storage array for a tissue log cutting saw , the array having a plurality of storage units , each of the storage units being adapted and configured to store a circular saw blade for the tissue log cutting saw , the array having a memory configured to store a data structure , the data structure comprising a plurality of data items associated together as a storage unit profile , the data items of the storage unit profile comprising data representative of at least one of a blade diameter , a blade material , last saw cutting operational data , a last blade inspection , a last blade sharpening , a last blade run-time , a cumulative number of cuts , and a cumulative blade run-time , the data items of the storage unit profile being associated with at least one circular saw blade stored in the storage unit of the array , the array being configured to transmit the storage unit profile to the tissue log cutting saw.2. The array of wherein the array comprises a processor claim 1 , the processor is configured to store the data structure in the memory claim 1 , the processor is adapted and configured to be in communication with the saw via a network and exchange data relating to the storage unit profile with the tissue log cutting saw.3. The array of wherein in response to detection of the array being detachably mounted to a structure of the saw and in communication on the network with the tissue log cutting saw claim 2 , the processor is further ...

Подробнее
Номер записи: 93
09-06-2016 дата публикации

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

Номер: US20160158959A9
Автор: David A. Fanning, J. David Fulmer, Stephen F. Gass
Принадлежит: SD3 LLC

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.

Подробнее
Номер записи: 94
28-08-2014 дата публикации

DOUBLE ARBOR VERTICAL SHAPE SAW

Номер: US20140238547A1
Автор: Bullion Conrad
Принадлежит: U. S. Natural Resources, Inc.

Embodiments relate to systems, methods, and apparatuses for shape sawing wood. Specifically, embodiments include an infeed with laterally displaceable positioning rolls and a longitudinal axis between the positioning rolls. The embodiments further include a saw box with a frame and a plurality of saws coupled with a plurality of vertical arbors within the frame. In certain embodiments, the frame is operable to move laterally or rotationally with respect to a horizontal axis of rotation. 1. A system for cutting wood , comprising:an infeed with a first pair of laterally displaceable positioning rolls and a longitudinal axis extending between the positioning rolls;a saw box with a frame, two vertical arbors coupled to the frame, and a horizontal axis of rotation, the two vertical arbors configured to bear one or more saws; anda first actuator coupled with the frame and operable to move the saw box laterally along the horizontal axis of rotation, wherein the saw box is configured to tilt around the horizontal axis of rotation.2. The system of claim 1 , the infeed further comprising a first chipper head.3. The system of wherein the laterally displaceable positioning rolls are rotatable around corresponding vertical axes of rotation claim 1 , the infeed further comprising a pivot member defining a pivot axis claim 1 , a first lever coupled to a first one of said positioning rolls claim 1 , and a second lever coupled to a second one of said positioning rolls claim 1 , the first and second levers connected by the pivot member claim 1 , wherein the first and second vertical supports are pivotable around the pivot axis.4. The system of claim 3 , the infeed further comprising a lateral support member claim 3 , a first carriage member pivotably coupled to the first lever claim 3 , and a second carriage member pivotably coupled to the second lever claim 3 , the first and second carriage members slideably coupled to the lateral support member claim 3 , wherein the first one of ...

Подробнее
Номер записи: 95
28-08-2014 дата публикации

DOUBLE ARBOR VERTICAL SHAPE SAW

Номер: US20140238548A1
Автор: Bullion Conrad
Принадлежит:

Embodiments relate to systems, methods, and apparatuses for shape sawing wood. Specifically, embodiments include an infeed with laterally displaceable positioning rolls and a longitudinal axis between the positioning rolls. The embodiments further include a saw box with a frame and a plurality of saws coupled with a plurality of vertical arbors within the frame. In certain embodiments, the frame is operable to move laterally or rotationally with respect to a horizontal axis of rotation. 1. A system for cutting wood , comprising:an infeed with a first pair of laterally displaceable positioning rolls and a longitudinal axis extending between the positioning rolls;a saw box with a frame, two vertical arbors coupled to the frame, and a horizontal axis of rotation, the two vertical arbors configured to bear one or more saws; anda first actuator coupled with the frame and operable to move the saw box laterally along the horizontal axis of rotation, wherein the saw box is configured to tilt around the horizontal axis of rotation.2. The system of claim 1 , the infeed further comprising a first chipper head.3. The system of wherein the laterally displaceable positioning rolls are rotatable around corresponding vertical axes of rotation claim 1 , the infeed further comprising a pivot member defining a pivot axis claim 1 , a first lever coupled to a first one of said positioning rolls claim 1 , and a second lever coupled to a second one of said positioning rolls claim 1 , the first and second levers connected by the pivot member claim 1 , wherein the first and second vertical supports are pivotable around the pivot axis.4. The system of claim 3 , the infeed further comprising a lateral support member claim 3 , a first carriage member pivotably coupled to the first lever claim 3 , and a second carriage member pivotably coupled to the second lever claim 3 , the first and second carriage members slideably coupled to the lateral support member claim 3 , wherein the first one of ...

Подробнее
Номер записи: 96
23-05-2019 дата публикации

Surgical Cutting Instrument With Near-Perimeter Interlocking Coupling Arrangement

Номер: US20190150942A1
Автор: Christopher M. Boykin, Durrell Tidwell
Принадлежит: Medtronic PS Medical Inc

A blade coupling mechanism for a hand-held surgical cutting instrument includes a first coupling member including a first blade-contacting surface and a first outer perimeter sidewall adjacent the first blade contacting surface. It also includes a second coupling member including a second blade-contacting surface facing the first blade-contacting surface of the first coupling member. The second coupling member includes a second outer perimeter sidewall adjacent the second blade contacting surface. The second blade-contacting surface and the second outer perimeter sidewall meet to define an outer edge. The second coupling member including a bore through the second blade contacting surface. The bore and the second blade contacting surface meeting to define an inner edge. Blade-engaging protrusions project from at least one of the first and second blade-contacting surfaces. The protrusions are spaced closer to the outer edge than the inner edge.

Подробнее
Номер записи: 97
22-09-2022 дата публикации

Laser Marking Tool for Saw Devices

Номер: US20220297212A1
Автор: Clark Kerry
Принадлежит:

The measuring device described herein relates to an automatic wood marker attachment device. The device can be selectively attached to a chainsaw or power saw. More specifically, the device is clamped to the handlebar of a chainsaw or power saw using clamping arms. A pair of independently operating and articulating laser sources are used for projecting linear laser beams. The laser beams provide markings on a wood log to enable an operator to make accurate and precise cuts using the automatic laser markers. The laser sources are controlled using a control button to independently operate the laser sources. Further, the laser sources can be adjusted to any desired angle to allow automatic marking at any predeterminable direction and spacing. 1. A laser marking device for marking a saw cut , the laser marking device comprising:a pair of laser light sources;a clamp for mounting said laser marking device on a saw;an adjustable arm for adjusting a height and a reach of said pair of laser light sources;said pair of laser light sources project laser beam lights onto a log;said laser beam lights comprise at least one linear light line to act as a guiding marker for an alignment of said saw; andsaid alignment of said saw corresponds to said saw cut.2. The laser marking device of claim 1 , wherein said pair of laser light sources project said laser beam lights simultaneously.3. The laser marking device of claim 1 , wherein said pair of laser light sources selectively project said laser beam lights independent of one another.4. The laser marking device of claim 2 , wherein said saw is a chainsaw.5. The laser marking device of claim 4 , wherein the marking of the saw cut includes a predeterminable length to maximize a yield from the log.6. The laser marking device of claim 5 , wherein said clamp is mounted to a handle of said saw.7. The laser marking device of further comprising a control button for selective operation of said pair of laser light sources.8. A laser marking ...

Подробнее
Номер записи: 98
18-06-2015 дата публикации

CONTROL SYSTEMS FOR POWER TOOLS

Номер: US20150165641A1
Автор: Gass Stephen F., Slamka Louis R.
Принадлежит: SD3, LLC

Control systems are disclosed for power tools such as table saws, miter saws, band saws, hand-held circular saws, jointers, shapers, routers, and up-cut saws. The control systems include systems to turn power tools on and off, and to control the supply of power to motors. The systems to turn power tools on and off may include dual switches that must be operated together to turn a power tool on. The systems to provide power to motors may include dual relays in series implemented with methods to minimize arcing and welding of the relays. The systems described herein may be implemented in power tools equipped with active injury mitigation technology. 1. A power tool comprising:a cutting tool,a motor to drive the cutting tool, andtwo switches, where both switches must be triggered within a predetermined period of time to start the motor.2. The power tool of claim 1 , further comprising a component configured to be moved by a person to start the motor claim 1 , where the two switches are associated with the component so that movement of the component by the person triggers the two switches to start the motor.3. The power tool of claim 2 , further comprising a microprocessor claim 2 , and where triggering the two switches signals the microprocessor to start the motor.4. The power tool of claim 3 , where the microprocessor is configured to start the motor only if the two switches are triggered within a predetermined period of time.5. The power tool of claim 4 , where the predetermined period of time is 100 milliseconds.6. A power tool comprising:a cutting tool,a motor to drive the cutting tool,switch means for providing a redundant signal to start the motor, andrelay means for providing electricity to the motor.7. The power tool of where the cutting tool is a circular saw blade.8. A power tool comprising:a cutting tool,an electric motor to drive the cutting tool,a first relay configured for electricity to be supplied to the motor through the first relay,a second relay in ...

Подробнее
Номер записи: 99
16-06-2016 дата публикации

Ratchet and Release Mechanism for Swing Arm of Table Saw

Номер: US20160167142A1
Автор: Chaganos Gregory, Koegel Jan, Szweda Timothy, Talesky Mark S., Taylor Brian
Принадлежит:

A table saw includes a safety system to protect a user from injury. The safety system detects a sensed condition and rapidly moves a saw blade away from the user. The safety system includes a dual ratchet mechanism to prevent the blade from rebounding back above a work surface after an initial rapid retraction of the blade. The table saw has a swing arm that rotates to move the blade below the work surface. A first ratchet engages a first contact surface of the swing arm after rotation of the swing arm over a first range of angular displacements to prevent counter rotation of the swing arm. A second ratchet engages a second contact surface of the swing arm after rotation of the swing arm over a second range of angular displacements to prevent counter rotation of the swing arm. 1. A table saw , comprising:a frame that supports a work surface;a swing arm that cooperates with the frame via a pivot, the swing arm defining first and second contact surfaces disposed concentrically about and proximate to the pivot;a blade rotatably attached to the swing arm at a position spaced from the pivot, the blade having an operating position in which the blade extends above the work surface and a retracted position in which an uppermost extent of the blade is positioned below the work surface, the swing arm rotatable about the pivot to move the blade from the operating position to the retracted position in response to a sensed condition;a first ratchet configured to cooperate with the first contact surface so as to maintain the blade in the retracted position after the swing arm rotates over any one of a first range of angular displacements from the operating position; anda second ratchet configured to cooperate with the second contact surface so as to maintain the blade in the retracted position after the swing arm rotates over any one of a second range of angular displacements from the operating position, the second range of angular displacements including angular displacements ...

Подробнее
Номер записи: 100