Adjustable To Impacting Device Patents (Class 173/48)
  • Patent number: 10408316
    Abstract: A planetary gear system with a sun gear, a ring gear co-axial with the sun gear, at least one planetary gear meshing with both the sun gear and the ring gear, and a planetary gear carrier which rotationally supports the at least one planetary gear. A torque clutch is supported by and connected directly between two of the sun gear, the ring gear, the at least one planetary gear and the planetary gear carrier. The torque clutch prevents relative rotation when an acting torque is below a predetermined torque value and allows relative rotation when the acting torque is above the predetermined torque value. A torque threshold adjustment mechanism is provided for adjusting the predetermined value of the torque at which the torque clutch slips.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: September 10, 2019
    Assignee: Black & Decker Inc.
    Inventors: Markus Rompel, Rafael Gottschling, Santiago Hernandez-Arenas
  • Patent number: 10377022
    Abstract: A power tool which has an anvil 20 that is rotated by a hammer 22 and is housed in a housing, and rotates an output shaft 18 is provided. The anvil 20 and the output shaft 18 are integrally formed into one unit, and a carrier 33 that is rotatable relative to the anvil 20 by a predetermined angle on the same axis is provided. On one portion of an outer circumferential surface of the anvil 20, a relief surface 20a is formed. Cut-out portions 33b are formed at positions opposed to each other of a carrier 33, and by allowing an engaging pin 37 to be interposed therein, a locking mechanism that limits the relative rotation between the anvil 20 and a lock ring 38 is prepared. When the tool main body is manually rotated while the hammer 22 is being stopped, the engaging pin 37 limits the relative rotation between the anvil 20 and the lock ring 38. The locked state between the anvil 20 and the lock ring 38 is released immediately when the rotation of the motor 4 is started.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: August 13, 2019
    Assignee: KOKI HOLDINGS CO., LTD.
    Inventors: Keita Saitou, Shinichirou Satou, Tomomasa Nishikawa, Masanori Watanabe, Takuya Teranishi
  • Patent number: 10195730
    Abstract: A rotary hammer includes a motor, a spindle coupled to the motor for receiving torque from the motor, a piston at least partially received within the spindle for reciprocation therein, a striker received within the spindle for reciprocation in response to reciprocation of the piston, and an anvil received within the spindle and positioned between the striker and a tool bit. The anvil imparts axial impacts to the tool bit in response to reciprocation of the striker. The rotary hammer also includes a synchronizing assembly operable in a first configuration in which the motor is drivably coupled to the piston for reciprocating the piston, and a second configuration in which the piston is decoupled from the motor. The rotary hammer further includes an actuator operable for switching the synchronizing assembly from the second configuration to the first configuration in response to depressing the tool bit against a workpiece.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: February 5, 2019
    Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
    Inventors: Andrew R. Wyler, Jeremy R. Ebner
  • Patent number: 10058987
    Abstract: The hand-held power tool has a tool socket, a motor and a pneumatic striking mechanism. The striking mechanism has an exciter driven by the motor along a working axis, a striker coupled to the exciter via an air cushion, and an intermediate striker arranged between the striker and the tool socket in the striking direction. The striking mechanism also has a guide in which the intermediate striker is guided. The guide has a first sliding surface that guides a first section of the intermediate striker, and a second sliding surface that is arranged offset relative to the first sliding surface in the striking direction and that guides a second section of the intermediate striker. A radial dimension of the first section of the intermediate striker is greater than a radial dimension of the second section of the intermediate striker.
    Type: Grant
    Filed: July 10, 2013
    Date of Patent: August 28, 2018
    Assignee: Hilti Aktiengesellschaft
    Inventors: Aaron Wiedner, Markus Hartmann
  • Patent number: 9522461
    Abstract: An impact tool (1) includes a motor (3); a hammer (42) having a rotational axis extending in a first direction, the hammer (42) being rotatable in a rotational direction including a forward direction and a reverse direction opposite to the forward direction by the motor (3) and being movable in the first direction and a second direction opposite to the first direction; an anvil (52) disposed at the first direction side of the hammer (42) and strikable by the hammer (42) in the forward direction, the hammer (42) that has been struck the anvil (52) being moved in the second direction to come free from the anvil (52); and a fixing member (45A, 46A) that selectively allows the hammer (42) to move in the second direction or prevents the hammer (42) from moving in the second direction.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: December 20, 2016
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Katsuhiro Oomori, Mizuho Nakamura, Yutaka Ito, Nobuhiro Takano, Tomomasa Nishikawa, Hironori Mashiko, Shigeru Takahashi
  • Patent number: 9494200
    Abstract: A clutch for a power tool includes an adjustment ring configured to move axially relative to the housing while being rotated relative to the housing. A spring retainer is disposed axially rearward of the adjustment ring. The spring retainer is coupled for rotation together with the adjustment ring and configured to remain substantially axially stationary relative to the housing when rotated. A spring is disposed between the adjustment ring and the spring retainer. A clutch face is coupled to a portion of the transmission. A locking member is disposed between the spring retainer and the clutch face. The locking member is configured to transfer a holding force exerted by the spring to the clutch face. Rotation and axial movement of the adjustment ring alters the holding force exerted by the spring. When an amount of output torque exceeds the holding force, torque transmission to the output spindle is effectively interrupted.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 15, 2016
    Assignee: BLACK & DECKER INC.
    Inventors: Joseph P. Kelleher, Daniel L. Krout, David C. Tomayko
  • Patent number: 9481080
    Abstract: A tool with a transmission assembly having a reduction gearset and a speed selector. The speed selector has a member, an actuator and a shifter assembly. The member is movable between a first position, in which the member is non-rotatable, and a second position in which the member is coupled to a planet carrier of the reduction gearset for common rotation. The actuator includes a pivoting yoke and a follower that is coupled to the yoke. The follower engages the member so as to be axially movable with the follower. The shifter assembly has a selector switch, a switch fork, and a pair of springs. The selector switch is slidable between a first switch position and a second switch position. The shift fork is slidably coupled to the selector switch and receives the yoke. The springs cooperate to bias the shift fork relative to the selector switch into a neutral position.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: November 1, 2016
    Assignee: BLACK & DECKER INC.
    Inventor: Brent A. Kuehne
  • Patent number: 9415448
    Abstract: A power drill has a housing holding a planetary gear transmission and a motor. A drive stem rotatable in the housing about the axis is rotationally coupled to the planet carrier, and a chuck body is rotatable on the housing. A driver axially bearing on the jaws is axially shiftable to position jaws in the chuck, and a sleeve threaded to the driver is rotatable to position the jaws in the chuck body. The drive stem can be coupled either to the chuck body for rotating a tool held by the jaws in a screw or drill mode or to the sleeve in a tighten/loosen mode for tool exchange. A first spring bears axially inward against a front face of the transmission ring gear with an adjustable axially inwardly directed force, and a second spring bears axially against a rear face of the ring gear.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: August 16, 2016
    Assignee: ROEHM GMBH
    Inventors: Peter Schenk, Markus Nusser
  • Patent number: 9339923
    Abstract: Disclosed is a striking tool technology that contributes to reducing clutch sizes. The striking tool causes a tool bit to perform a striking operation in the long axis direction and to perform a rotational operation about the long axis, thereby causing the tool bit to carry out a predetermined machining operation. The striking tool comprises a tool body; a motor which is housed in the tool body and drives the tool bit; and a clutch which, on a route where the torque of the motor is transmitted to the tool bit, is disposed in a high rotational speed and low torque region that is a stage prior to where the rotational speed of the motor is reduced, which transmits the torque of the motor to the tool bit in a normal state, and which cuts off the transmission of torque generated about the tool bit long axis in the tool body if the torque exceeds a predetermined torque level.
    Type: Grant
    Filed: October 20, 2010
    Date of Patent: May 17, 2016
    Assignee: MAKITA CORPORATION
    Inventor: Yonosuke Aoki
  • Patent number: 9254562
    Abstract: An improved power tool is provided which can alert a user of any halfway selection of a driving mode of a tool bit. A representative power tool is provided which is capable of switching among driving modes different in driving state of a tool bit. The power tool has a mode switching member that switches among the driving modes, a detecting part that detects a drive prohibited state in which any of the driving modes of the tool bit is not selected, and indicating parts that indicate a result detected by the detecting part.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: February 9, 2016
    Assignee: Makita Corporation
    Inventors: Masanori Furusawa, Yoshihiro Kasuya
  • Patent number: 9221112
    Abstract: A power tool includes a motor having a can and a shaft extending axially from the can, a gear case having an inner surface that defines an opening, a bearing positioned around a portion of the shaft that extends from the can and at least partially within the opening in the gear case, and a motor mount coupled to the motor. The motor mount includes a flange extending away from the motor. The flange of the motor mount and the inner surface of the gear case axially and laterally locate the motor and the gear case on the bearing.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: December 29, 2015
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Sean T. Kehoe, Benjamin Ludy, Troy C. Thorson, Michael Naughton
  • Patent number: 9205547
    Abstract: An impact driver with a vibration mechanism includes a vibration switching ring externally fitted to a second cam in the forward position in such a manner that an inner protrusion on the inner circumference is latched a protrusion on the outer circumference of the second cam so that the rotation of the second cam is restricted. Further, a coil spring is provided for biasing the vibration switching ring to the forward position. A link plate provided between the mode switching ring and the vibration switching ring latches onto the front surface of the vibration switching ring and engages an engaging protrusion at the rear end with a mode switching ring. The link plate moves forward or backward to a first position where the vibration switching ring moves to the forward position or a second position where the vibration switching ring moves to the backward position.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: December 8, 2015
    Assignee: MAKITA CORPORATION
    Inventors: Tokuo Hirabayashi, Tomoyuki Kondo
  • Patent number: 9149872
    Abstract: In a tool attachment, for fastening to an handheld machine tool equipped with a tool holding fixture, having an output shaft and a base body, which forms an inner cavity and on whose outer circumference an axially displaceable locking sleeve is situated, for releasing at least one associated locking element against a spring force of a spring element, which has a clamping ring, in the inner cavity, a anti-rotation locking unit is configured for the rotationally locked fastening of the base body to a fastening unit associated with the handheld machine tool, the anti-rotation locking unit and the fastening unit having complementary geometric forms, which are configured to engage with each other for the detachable rotationally locked fastening of the base body on the fastening unit; and the at least one associated locking element being situated in the vicinity of the anti-rotation locking unit.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: October 6, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventors: Dietmar Saur, Michael-Andreas Grunwald
  • Patent number: 9133909
    Abstract: A hand-held tool device includes a planetary transmission and a striking mechanism. The striking mechanism has at least one striking mechanism shut-off clutch and a striking mechanism switching spring which opens the striking mechanism shut-off clutch in at least one operating state. The planetary transmission has at least one planetary transmission stage which at least partially encloses the striking mechanism switching spring in at least one plane.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: September 15, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventors: Jens Blum, Tobias Herr
  • Patent number: 9121478
    Abstract: A hand-held tool device includes: a tool spindle; a striking mechanism; and a planetary transmission having at least one first planetary transmission stage which drives the striking mechanism, a second planetary transmission stage which drives the tool spindle, and a striking mechanism shut-off clutch.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: September 1, 2015
    Assignee: ROBERT BOSCH GMBH
    Inventor: Tobias Herr
  • Patent number: 9091276
    Abstract: In a sleeve element for the axially fixing at least one bearing of a rotatable shaft, in particular a shaft of an exhaust gas turbocharger, which sleeve element has at least one through-opening in its circumferential surface, the at least one through-opening has a substantially conical shape in the radial direction of the sleeve element at least in a section thereof, and also in a turbocharger for an internal combustion engine, which comprises a speed detection device and a sleeve element for axially fixing at least one bearing of a shaft of the turbocharger, wherein the sleeve element has at least one opening through which the speed detection device extends and which has a substantially conical shape in the radial direction of the sleeve element at least in a section thereof.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: July 28, 2015
    Assignee: DAIMLER AG
    Inventors: Gernot Hertweck, Johannes Seuffert
  • Patent number: 9050713
    Abstract: A power tool is disclosed. The power tool includes a striker, a guide tube in which the striker is guided along an axis, and a pneumatic chamber, which is closed by the striker, the guide tube and a valve device actuated by its own medium. A volume of the pneumatic chamber changes in the case of a movement of the striker along the axis. The valve device has a swivelable sealing element between the striker and the guide tube. The swivelable sealing element is swiveled into a retracted position when the striker moves in the impact direction and is swiveled into an extended position when the striker moves against the impact direction. In the retracted position, the sealing element has a first inflow surface. In the extended position, the sealing element has a second inflow surface. The second inflow surface is larger than the first inflow surface.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: June 9, 2015
    Assignee: Hilti Aktiengesellschaft
    Inventors: Markus Hartmann, Frank Kohlschmied, Christian Daubner
  • Patent number: 9038745
    Abstract: A drive train for supplying power to a power tool may include, a motor, a motor shaft, a rotational coupling mechanism connected to the motor shaft, and a drive shaft connected to the rotational coupling mechanism that forms the shape of a “U.” A pair of enmeshed bevel gears transfers the motion from the motor shaft to an orthogonal tool bit. The drive train may also include a hammering device that transfers a rotational impacting motion to the tool bit. A hand power tool for driving a screw may include a tool shell with an integrally formed vertical handle, a rotational recess formed into the tool shell opposite the handle, and a tool chuck within the rotational recess that drives a screw. The tool may incorporate the drive train as described above. The tool may include a mechanism for locking the tool chuck in a particular position.
    Type: Grant
    Filed: December 17, 2011
    Date of Patent: May 26, 2015
    Assignee: Brigham Young University
    Inventors: Christopher Mattson, Robert Campbell, Clark Davis, David Olligschlager, Brad Solomon, Samuel Wilding
  • Publication number: 20150129268
    Abstract: A hand-held power tool device is described which includes an output unit, a striker, and a rotary percussion receiver which is designed for establishing a transfer of rotary percussions between the striker and the output unit, at least during a rotary percussion operation. It is provided that the hand-held power tool device includes a rotary percussion switch-off device which is designed for interrupting the transfer of rotary percussions from the striker to the rotary percussion receiver, at least during a hammer percussion operation.
    Type: Application
    Filed: May 14, 2013
    Publication date: May 14, 2015
    Applicant: Robert Bosch GmbH
    Inventor: Tobias Herr
  • Patent number: 9010456
    Abstract: A hand-held power tool, particularly a hammer drill, includes a work spindle, a hand-held power tool housing and an intermediate shaft, which is arranged in parallel to the work spindle and mounted in an axially displaceable manner for changing the operational mode, and a tooth sleeve, which is provided to transfer a torque to the intermediate shaft. The tooth sleeve is fixed in the axial direction by means of the hand-held power tool housing.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: April 21, 2015
    Assignee: Robert Bosch GmbH
    Inventors: Kurt Sieber, Otto Baumann, Elisabeth Michl, Hardy Schmid, Holger Ruebsaamen, Tobias Herr
  • Patent number: 9010455
    Abstract: When the mode change knob of a multi-mode hammer drill is moved to the hammer only position, an electronic sensor sends a signal to a control logic circuit. When the user then depresses the trigger mechanically closing the ON/OFF switch, the control logic circuit applies a voltage either to a holding relay or to the gate of a triac which enables the relay or triac to conduct, thus providing a parallel circuit by-passing the ON/OFF switch. Consequently, when the user releases the trigger and opens the ON/OFF switch, the parallel relay or triac maintains current flow to the motor. It can be seen that in hammer only mode the user can activate the hammer drill by simply tapping the trigger to depress it and does not need to hold down trigger during use of the hammer in operation.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: April 21, 2015
    Assignee: Black & Decker Inc.
    Inventors: Achim Jung, René Jäger, Ian S. Bell
  • Publication number: 20150083451
    Abstract: A power tool having an impact mechanism part using a hammer 24 and an anvil 31 is provided with a switching mechanism 35 of a mode in which the hammer 24 impacts the anvil 31 while the hammer is placed over the anvil 31 and another impact mode in which the hammer 24 impacts the anvil 31 without being placed over the anvil 31. The switching mechanism 35 includes a stopper 41 and a pusher 45 disposed in the rear of the hammer 24, and the stopper 41 is moved to carry out switching by rotating the pusher 45. The change member 48 that rotates the pusher 45 has a change lever 48b, which is positioned in the outer side of the hammer case 32, and the change member 48 and an annular part 46 are engaged in a housing.
    Type: Application
    Filed: March 4, 2013
    Publication date: March 26, 2015
    Applicant: HITACHI KOKI CO., LTD.
    Inventor: Tomomasa Nishikawa
  • Publication number: 20150075828
    Abstract: A handheld tool device includes a hammer mechanism that has at least a striker and a cam guide that drives the striker at least in a hammer-drilling mode. The striker has at least a portion of the cam guide.
    Type: Application
    Filed: December 19, 2012
    Publication date: March 19, 2015
    Inventor: Tobias Herr
  • Publication number: 20150047866
    Abstract: An electric tool in which a pulsating input voltage is configured to be supplied to a drive circuit of a motor, the electric tool including: a rotation speed detection unit configured to detect a rotation speed of the motor, characterized in that the electric tool further includes: a control part configured to vary a determining value for determining whether the rotation speed of the motor satisfies a predetermined condition or not, so as to be synchronous with a pulsation cycle of the input voltage supplied to the drive circuit.
    Type: Application
    Filed: March 29, 2013
    Publication date: February 19, 2015
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Hironori Sakai, Naoki Tadokoro, Kazutaka Iwata
  • Patent number: 8939228
    Abstract: In a clutch mechanism of a percussion driver drill, a plurality of engageable members held in a gear case is configured to be engageable with an end face of a final-stage internal gear, and a coil spring is configured to press the engageable members against the end face of the internal gear. The coil spring is disposed frontwardly of the engageable members between a switch member and an operating member of a vibration mechanism. A coupling member connected with the switch member and the operating member is disposed to pass through a gap between the plurality of engageable members and detour around a rear end of the coil spring.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: January 27, 2015
    Assignee: Makita Corporation
    Inventor: Tomoyuki Kondo
  • Publication number: 20150014009
    Abstract: A hammer drill comprises a motor including an output shaft, a shaft assembly rotationally engaged therewith, a hollow spindle, and a hammer mechanism comprising a piston arranged for reciprocating motion within the spindle. The shaft assembly comprises a first part carrying a first gear engaged with a gear on the spindle to cause spindle rotation, a second part carrying a crank member to cause piston reciprocation, and a connecting part configured to rotationally interconnect, or disconnect, the first and second parts. In a first position of the connecting part only one of the first and second parts is rotationally engaged with the output shaft to enable rotation of only one of the first gear and the crank member respectively, while in a second position both the first and second parts are rotationally engaged with the output shaft to enable rotation of both the first gear and the crank member.
    Type: Application
    Filed: June 27, 2014
    Publication date: January 15, 2015
    Inventors: Ernst Staas, Stefan Gensmann, Achim Buchholz
  • Patent number: 8925646
    Abstract: An angle impact tool includes a handle assembly extending along a first axis, a prime mover in the handle, an output shaft rotatable about the first axis, and a work attachment connected to the handle assembly. An output drive is supported in the work attachment for rotation about an output axis perpendicular to the first axis. A gear assembly including a spur gear is positioned within the work attachment to transfer torque from the prime mover about the first axis to the output drive about the output axis. An impact mechanism is positioned within the work attachment and includes a hammer and an anvil. The hammer rotates under the influence of the prime mover and is operable to periodically deliver an impact load to the anvil. The output drive rotates about the output axis under the influence of the impact load being transmitted to the output drive by the anvil.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: January 6, 2015
    Assignee: Ingersoll-Rand Company
    Inventors: Warren Andrew Seith, Lucas James Taylor
  • Publication number: 20140374130
    Abstract: An impact tool includes a motor, a hammer, an anvil, and a control unit. The hammer is configured to be driven by the motor and be movable in an axial direction of the motor. The anvil is configured to be struck by the hammer. The control unit is configured to control a rotation of the motor. The impact tool further includes a restricting unit configured to restrict the movement of the hammer in the axial direction. The control unit is configured to select a driving mode of the motor between a first mode and a second mode. The control unit selects the first mode when a load of the motor is less than or equal to a prescribed value regardless of a restriction of the restricting unit, whereas the control unit selects the second mode when the load exceeds the prescribe value and the restricting unit restricts the movement of the hammer.
    Type: Application
    Filed: March 4, 2013
    Publication date: December 25, 2014
    Inventors: Mizuho Nakamura, Nobuhiro Takano, Tomomasa Nishikawa, Hironori Mashiko
  • Patent number: 8893819
    Abstract: The invention relates to a hand-held power tool with a drive shaft embodied in the form of a spindle shaft, which is connected to a tool-clamping device. The drive shaft, which is coupled to a drive motor, cooperates with a torque clutch. The torque clutch is provided with a clutch-adjusting ring that is coupled to a transmission element that cooperates with at least one clutch-adjusting device in order to adjust a torque. The transmission element is situated in an axially and/or radially movable fashion on the outer circumference of a housing component. According to the invention, in at least one position of the clutch-adjusting ring, the transmission element protrudes axially beyond the housing component in the direction toward the tool-clamping device.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: November 25, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Tobias Herr
  • Publication number: 20140338941
    Abstract: A hand power tool includes a drive spindle, a mechanical impact mechanism, and a spindle lock device. The mechanical impact mechanism has an impact body having at least two drive cams. The spindle lock device has a spindle roller carrier disposed on the drive spindle. At least two spindle rollers are disposed on the spindle roller carrier. The spindle lock device is connected via a coupling member to the mechanical impact mechanism. The coupling member is disposed between the impact body and the spindle roller carrier, in the axial direction of the drive spindle. The coupling member is configured to effect rotary driving of the spindle roller carrier, upon rotary driving by the impact body, when the hand power tool is in a normal mode.
    Type: Application
    Filed: May 1, 2014
    Publication date: November 20, 2014
    Applicant: Robert Bosch GmbH
    Inventors: Gai Sheng Koh, Sim Teik Yeoh
  • Publication number: 20140338940
    Abstract: A power tool includes a tool housing, an output spindle, a motor received in the tool housing, a transmission coupled to the motor and configured to transmit torque from the motor to the output spindle, a clutch assembly, and a hammer assembly. The clutch assembly includes a clutch mechanism configured to interrupt torque transmission from the transmission to the output spindle when an output torque exceeds a threshold, and a clutch housing composed of a non-metallic material and supporting at least a portion of the clutch mechanism. The hammer assembly includes a hammer mechanism configured to apply axial impacts to the output spindle when the hammer mechanism is engaged, and a hammer housing composed of a heat conductive material and supporting at least a portion of the hammer mechanism.
    Type: Application
    Filed: May 14, 2013
    Publication date: November 20, 2014
    Inventors: Joseph P. Kelleher, Daniel L. Krout, Seth M. Robinson, John K. Horky, Paul S. White
  • Publication number: 20140262389
    Abstract: A power tool and method for recording and playing back a motor parameter. The power tool includes housing, a motor, a trigger, a mode selector switch, and a controller. The trigger outputs an activation signal based on a user input. The mode selector switch is configured to receive a user mode selection indicating a recording mode, a normal operating mode, or a playback mode. The controller receives a mode selection signal from the mode selector switch indicating the selected mode. The controller enters the recording mode when the user mode selection indicates the recording mode, and records a motor parameter while the power tool is in the recording mode to generate a recorded motor parameter. In the playback mode, the controller operates the motor based on the recorded motor parameter upon receiving the activation signal from the trigger.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: Milwaukee Electric Tool Corporation
    Inventors: Thomas G. Simeone, Matthew J. Mergener, Matthew Wycklendt
  • Publication number: 20140262394
    Abstract: An impact tool includes a housing, a motor having an output shaft defining a first axis, a drive shaft rotatably supported by the housing about a second axis oriented substantially normal to the first axis, and an impact mechanism coupled between the motor and the drive shaft and operable to impart a striking rotational force to the drive shaft. The impact mechanism includes an anvil rotatably supported by the housing and coupled to the drive shaft, and a hammer coupled to the motor to receive torque from the motor and impart the striking rotational force to the anvil. The impact tool also includes a locking mechanism operable to selectively lock the drive shaft relative to the housing.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Inventors: John S. Scott, Ryan A. Dedrickson
  • Patent number: 8820431
    Abstract: A power tool having a housing, an electric motor disposed in the housing, and a spindle drivingly attached to the electric motor. The spindle includes a cavity adapted for receiving a bit therein and a window extending through the spindle in communication with the cavity. The power tool further has a retention device including a bit engaging member disposed within the housing and operable to extend through the window and retain a bit within the cavity. The power tool still further has an actuator operable by a user externally of the housing to disengage the bit engaging member from a bit received in the cavity and, finally, a mechanical interconnection system operably coupled between the actuator and the retention device to actuate the retention device in response to the actuator, wherein the mechanical interconnection is disposed within the housing.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: September 2, 2014
    Assignee: Black & Decker Inc.
    Inventors: Daniel Puzio, Aris C. Cleanthous, Daniel L. Krout, Robert G. Kusmierski
  • Patent number: 8794348
    Abstract: A power tool having a rotary impact mechanism and a mode change mechanism. The impact mechanism is driven by an output member of a transmission and includes a hammer and an anvil. The mode change mechanism includes a mode collar that is movable between a first position, in which the mode collar directly couples the hammer to the transmission output member to inhibit movement of the hammer relative to the spindle, and a second position in which the mode collar does not inhibit movement of the hammer relative to the spindle.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: August 5, 2014
    Assignee: Black & Decker Inc.
    Inventors: Scott M. Rudolph, Daniel Puzio, Sankarshan N. Murthy, Aris Cleanthous, Joseph Stauffer, Robert S. Gehret, James D. Hays, Qiang Zhang
  • Publication number: 20140209339
    Abstract: The invention relates to a power drill, having a tool-clamping device that is coupled to a drive motor via a drive shaft and a torque clutch equipped with a transmission element. The torque clutch has a clutch-adjusting ring that cooperates at least indirectly with at least one clamping element that exerts a prestressing force on the transmission element. An end of the drive shaft oriented toward the tool-clamping device is guided in a bearing that axially fixes the drive shaft in a drilling or screwdriving position and axially releases the drive shaft in an impact drilling position. The bearing cooperates with a bearing holder, which moves the bearing axially via a user-actuatable actuating element. According to the invention, the actuating element is coupled to an adjusting element that axially fixes the transmission element and axially releases the bearing in the impact drilling position and axially releases the transmission element and axially fixes the bearing in the drilling or screwdriving position.
    Type: Application
    Filed: March 28, 2014
    Publication date: July 31, 2014
    Applicant: ROBERT BOSCH GMBH
    Inventor: Tobias Herr
  • Patent number: 8770315
    Abstract: An impact tool includes a bit holding device with an elongate tool holder having a bit holding hole with a tool bit, an outer shell component forming an outer shell of the bit holding device and mounted onto a front end portion of the tool holder, a stopper fitted onto the tool holder and prevented from moving in a longitudinal direction of the tool holder, and prevents the outer shell component from becoming detached from the front end of the tool holder, and an opening prevention member disposed outward of a center position of the stopper in the longitudinal direction of the tool holder and opposed to an outer surface of the stopper in a direction transverse to the longitudinal direction of the tool holder, and prevents the stopper from opening in the direction transverse to the longitudinal direction of the tool holder.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: July 8, 2014
    Assignee: Makita Corporation
    Inventors: Hajime Takeuchi, Masanori Furusawa, Naoki Soeda
  • Patent number: 8739893
    Abstract: The invention relates to a multi-gear transmission device, particularly a two-gear transmission device, for transferring a drive torque from an input side to an output side, which transmission device has at least two selectable gear ratios. The multi-gear transmission device further has a multi-stage clutch device, particularly a two-stage clutch device, with at least two different, selectable limit torques. According to the invention, the multi-stage transmission device has at least two preferably switchable translating gear pairs, and the multi-stage clutch device is included in the translating gear pairs.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: June 3, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Willy Braun
  • Publication number: 20140144657
    Abstract: An operation mode switching mechanism for use with a power tool disclosed in the present invention includes a torsion unit, a switching unit, a clutch member, a power output member and an output shaft, where the switching unit can be switched between three rotating positions and one impact position. When the switching unit is at one of the rotating positions (screw symbols), the output shaft is driven to rotate by a carrier plate; and when switching unit is switched to the impact position (impact symbol), the output shaft is pushed by the clutch member so as to disengage from the carrier plate and is driven by a planet plate. The clutch member also restricts the direction of motion of the output shaft in the impact position, so the output shaft moves back and forward to generate reciprocating impact output.
    Type: Application
    Filed: November 27, 2012
    Publication date: May 29, 2014
    Applicant: POWER NETWORK INDUSTRY CO., LTD.
    Inventor: Lung-Hsuan TSENG
  • Publication number: 20140138111
    Abstract: It is an object of the invention to provide an improved impact tool in which a biasing member is not affected by dust. An impact tool according to the invention has a driving mechanism 120 for driving a tool bit 119, housing parts 105, 106 that form a housing space 105a in which at least part of the driving mechanism 120 is disposed, and a switching member 160 for switching a drive mode of the impact tool. The switching member 160 has an operating member 161 that is operated by a user for mode switching, and a biasing member 175 that is disposed between the operating member 161 and the housing part 106 and biases the operating member 161 so as to hold the operating member 161 in a selected position. The biasing member 175 is disposed in the housing space 105a.
    Type: Application
    Filed: November 6, 2013
    Publication date: May 22, 2014
    Inventors: Hajime TAKEUCHI, Masanori FURUSAWA, Yoshiro TADA
  • Patent number: 8720598
    Abstract: The invention relates to a power drill, having a tool-clamping device that is coupled to a drive motor via a drive shaft and a torque clutch equipped with a transmission element. The torque clutch has a clutch-adjusting ring that cooperates at least indirectly with at least one clamping element that exerts a prestressing force on the transmission element. An end of the drive shaft oriented toward the tool-clamping device is guided in a bearing that axially fixes the drive shaft in a drilling or screwdriving position and axially releases the drive shaft in an impact drilling position. The bearing cooperates with a bearing holder, which moves the bearing axially via a user-actuatable actuating element. According to the invention, the actuating element is coupled to an adjusting element that axially fixes the transmission element and axially releases the bearing in the impact drilling position and axially releases the transmission element and axially fixes the bearing in the drilling or screwdriving position.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: May 13, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Tobias Herr
  • Patent number: 8708060
    Abstract: A synchronization mechanism of a clutch mechanism includes a drive side contact member and a driven side contact member provided on a drive side clutch member and a driven side clutch member of a clutch mechanism at positions radially inwardly of a drive side clutch portion and a driven side clutch portion, respectively. The driven side contact member does not contact the drive side contact member when the driven side clutch member is in a disengaging position. As the driven side clutch member moves from the disengaging position to an engaging position, the driven side contact member contacts the drive side contact member, so that the rotation of the drive side clutch member is transmitted to the driven side clutch member through frictional contact between the driven side contact member and the drive side contact member before the driven side clutch member reaches the engaging position.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: April 29, 2014
    Assignee: Makita Corporation
    Inventor: Kazunori Tsuge
  • Publication number: 20140110140
    Abstract: A hammer drill includes a housing, a first ratchet fixed to the housing, a spindle rotatably supported by the housing about an axis, and a second ratchet coupled for co-rotation with the spindle. The second ratchet is engageable with the first ratchet in response to rearward displacement of the spindle to impart a hammering action on the spindle. The hammer drill further includes a thrust bearing having an arm extending away from the axis, and a selector ring having a post extending toward the arm. The selector ring is rotatable between a first position in which the post is engageable with the arm to limit the rearward displacement of the spindle and prevent engagement of the first and second ratchets, and a second position in which the post is misaligned with the arm to permit the rearward displacement of the spindle and engagement of the first and second ratchets.
    Type: Application
    Filed: October 17, 2013
    Publication date: April 24, 2014
    Applicant: Milwaukee Electric Tool Corporation
    Inventor: William A. Elger
  • Patent number: 8684105
    Abstract: A technique is provided which improves durability in a power tool having a torque transmission device. The representative power tool has a torque transmission device 151. The torque transmission device 151 includes a projection 171 formed on one of opposed surfaces of a first rotating member 153 and a second rotating member 155 and protruding in a direction of a rotational axis, a recess 161 for receiving the projection 171, which is formed in the other of the opposed surfaces and recessed in the direction of the rotational axis, a projection-side engagement surface 175a formed on the projection 171, and a recess-side engagement surface 165a formed on the recess 171. Torque is transmitted when the projection-side and recess-side engagement surfaces 175a, 165a are engaged with each other, while the torque transmission is interrupted when the projection-side and recess-side engagement surfaces 175a, 165a are disengaged from each other.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: April 1, 2014
    Assignee: Makita Corporation
    Inventors: Kiyonobu Yoshikane, Yoshitaka Machida
  • Patent number: 8672049
    Abstract: A vibration drill unit capable of obtaining an intensive drilling force. The vibration drill unit includes a first ratchet, anon-rotatable second ratchet having a claw engageable with the claw of the first ratchet, and a main body frame for accommodating a motor, a spindle, the first ratchet and the second ratchet. The respective claws of the first ratchet and the second ratchet include the first inclined surfaces formed so as to be engaged in the rotation direction by rotations of the first ratchet and so as to be separated from each other, the second inclined surfaces having greater inclination in the reversed direction than the first inclined surfaces, top parts that link the upper parts of both inclined surfaces to each other, and flat parts that link the bottom parts of both inclined surfaces to each other.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: March 18, 2014
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Junichi Tokairin, Kenji Kataoka, Yukio Terunuma, Hideki Watanabe, Shigeru Ishikawa, Shinki Ohtsu
  • Patent number: 8674640
    Abstract: An electric power tool includes: a motor; a manipulation input receiving unit which receives a user manipulation input for rotating the motor; a mode changeover unit that has one manipulation portion which manipulated by the user; a rotation drive force transmitting unit that switches a transmission mechanism to one of the transmission mechanisms corresponding to the set position of the manipulation portion and transmits a drive force of the motor to a tool output shaft via the switched transmission mechanism; an electric signal output unit that outputs an electric signal corresponding to the set position of the manipulation portion; and a motor control unit that sets the control method of the motor to a control method preset for the electric signal, among a plurality of different types of control methods, based on the electric signal, and controls the motor by the set control method, based on manipulation by the user.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: March 18, 2014
    Assignee: Makita Corporation
    Inventors: Hidekazu Suda, Takuya Kusakawa
  • Patent number: 8662197
    Abstract: The disclosure relates to a method of assembling a hand machine tool having (i) an intermediate flange that includes (i) at least one base body having a slot-shaped opening extending in a bearing position and in a bearing, (ii) an intermediate shaft assembly that includes an intermediate shaft and a wobble bearing having a wobble pin, and (iii) a drive piston. The method includes sliding the drive piston onto the wobble pin, introducing the wobble pin into the slot-shaped opening such that the drive piston slides into the at least one base body, and inserting, in an assembly direction corresponding to a direction of a longitudinal axis of the base body, the intermediate shaft of the intermediate shaft assembly into a second base body of the immediate flange.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: March 4, 2014
    Assignee: Robert Bosch GmbH
    Inventors: Thomas Bernhardt, Holger Ruebsaamen, Andreas Schlegel
  • Patent number: 8662196
    Abstract: It is an object of the invention to provide an effective technique for a motor support structure of a power tool to reduce vibration. A representative reciprocating power tool may include a tool body, a tool bit, a grip, a motor, a tool bit side bearing, a grip side bearing, a tool bit side bearing housing, a grip and an elastic element. The tool bit side bearing housing houses the tool bit side bearing, while the grip side bearing housing houses the grip side bearing. The elastic element is disposed between the grip side bearing housing and the grip wherein the grip side bearing housing is elastically supported by the grip via the elastic element. According to the invention, because the grip is adapted to support the grip side bearing housing via the elastic element and the rigidity of the grip side bearing housing can be increased and vibration of the grip side bearing housing can be reduced.
    Type: Grant
    Filed: July 3, 2006
    Date of Patent: March 4, 2014
    Assignee: Makita Corporation
    Inventors: Keiji Nakashima, Takayuki Tahara, Hajime Takeuchi, Ryo Sunazuka
  • Publication number: 20140054056
    Abstract: A handheld power tool has a switchable gear component actuatable by a selector switch. The gear component moves from a first operating position into a second operating position. The selector switch has a first switching position associated with the first operating position and a second switching position associated with the second operating position, and movable so that intermediate positions are assumed. A traveling coupling between the selector switch and the gear component has a spring exerting force onto the gear component in the first direction. A locking bolt is coupled to the selector switch in a positively driven manner. In the intermediate positions, the locking bolt is moved into a blocking bolt position blocking movement of the gear component out of the first operating position into the second operating position. When the selector switch is in the second switching position, the locking bolt is in a releasing bolt position.
    Type: Application
    Filed: February 13, 2013
    Publication date: February 27, 2014
    Applicant: Hilti Aktiengesellschaft
    Inventor: Hilti Aktiengesellschaft
  • Publication number: 20140054057
    Abstract: A rotary hammer is adapted to impart axial impacts to a tool bit. The rotary hammer includes a motor, a spindle coupled to the motor for receiving torque from the motor, and a piston at least partially received within the spindle for reciprocation therein. A crank hub is coupled to the motor for receiving torque from the motor. The crank hub defines a rotational axis and includes a socket offset from the rotational axis. A pin includes a first portion at least partially received within the socket and a second portion fixed to the piston. The first portion of the pin is both pivotable within the socket and axially displaceable relative to the socket in response to rotation of the crank hub for reciprocating the piston between a forward-most position within the spindle and a rearward-most position within the spindle.
    Type: Application
    Filed: August 20, 2013
    Publication date: February 27, 2014
    Applicant: Milwaukee Electric Tool Corporation
    Inventors: Benjamin Ludy, Daryl S. Richards