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| Number | Title | Issue Date |
| 8074732 | Discontinuous drive power tool spindle and socket interface A discontinuous drive power tool assembly for generating rotational torque. The tool assembly includes a spindle having a first end portion configured to receive a socket. The first end portion has a primary engaging surface and a tapered surface spaced from a dista... | 12/13/2011 |
| 8042621 | Impact mechanism for an impact wrench An impact mechanism (12) for an impact wrench comprises an anvil (8) with a middle portion (13), at least one abutment surface (14) radially protruding therefrom, which forms at least one abutment surface (15), a hammer (4) ... | 10/25/2011 |
| 8020630 | Swinging weight assembly for impact tool A swinging weight assembly for an impact tool includes an anvil having an impact jaw that is reinforced with a circumferential flange. A hammer includes a hammer lug and a cam lug for pivoting the hammer between an engaged position in which the hammer lug strikes th... | 09/20/2011 |
| 7918286 | Impact tool In an impact tool including a spindle, an anvil, and an impact mechanism having a hammer and a coil spring, a restricting portion is provided at a front surface of a large-diameter portion of the spindle so as to receive a rear end of the coil spring and to restrict... | 04/05/2011 |
| 7703546 | Pulse tool and associated front plate A pulse tool, in particular a pulse nutsetter, has a drive unit and a pulse unit driven by it. The pulse unit has at least one rotor with at least two vanes, a hydraulic cylinder surrounding it and a drive spindle protruding at one end out of the hydraulic cylinder ... | 04/27/2010 |
| 7673702 | Impact wrench An impact mechanism includes a shaft, a hammer and an anvil coupled to the hammer. The shaft has a first helical groove and the hammer has a second helical groove. A ball is received in the first and second helical grooves to rotationally couple the hammer to the sh... | 03/09/2010 |
| 7438140 | Shock attenuating device for a rotary impact tool A shock attenuating coupling device is provided for a rotary impact tool for drivingly connecting a hammer mechanism to a drive anvil. The shock attenuating coupling device includes a first coupling member, a second coupling member, a drum, a shoe, and a body of res... | 10/21/2008 |
| 7410007 | Impact rotary tool with drill mode An impact rotary tool is provided that is switchable between an impact mode where the tool delivers an impacting torque on an output tool and a drill mode where the driver delivers a smooth output on an output tool. The impact rotary tool includes an impact mechanis... | 08/12/2008 |
| 7404450 | Pneumatic rotary tool A pneumatic rotary tool has a housing formed primarily from plastic so that the weight and price of the tool are substantially reduced. The air motor is formed for economic assembly while permitting greater structural stability should the housing deflect under an im... | 07/29/2008 |
| 7377331 | Damping driving axle A damping drive axle includes an output shaft divided into a first portion and a second portion, a mounting seat having a centrally defined hole, a first compartment to correspond to and receive therein the first portion of the output shaft and a second compartment ... | 05/27/2008 |
| 7357194 | Percussion power tool A percussion power tool includes a motor (6) located in the tool-housing (4) for driving the output member (12) and the percussion mechanism (10), a chuck (20) for receiving a working tool (22), a locking mechanism (24 | 04/15/2008 |
| 7331404 | Lubrication system for impact wrenches A lubrication apparatus, system and method for a tool is disclosed. The tool includes a rotating impact assembly and the lubrication apparatus, system and method directs lubricant from a radially outward position to a radially inward position in the impact assembly.... | 02/19/2008 |
| 7258048 | Manually operated impact wrench A manually operated impact tool is provided and includes: an impact mass; an anvil rotatably disposed relative to the impact mass; an input member operatively connected to one of the impact mass and anvil mass for imparting a relative rotation between the impact mas... | 08/21/2007 |
| 7255029 | Manually operated impact tool A manually operated impact tool having: a handle; an anvil movably connected to the handle, the anvil having an anvil surface, the anvil further having a fastener engagement portion for engaging a fastener to be loosened or tightened, the fastener engagement portion... | 08/14/2007 |
| 7249638 | Impact wrench anvil and method of forming an impact wrench anvil An anvil adapted to be received within an impact wrench comprises a round body and a square head. The square head is formed at an end of the round body. A tapered ramp extends from the round body to the square head. A radius is formed in the tapered ramp. ... | 07/31/2007 |
| 7225884 | Hand power tool, in particular drilling screwdriver A hand power tool has a tool spindle rotatable by a drive train, a cam device located in the drive train and having two cam discs in engagement with one another for transmitting axial percussion motions to the tool spindle, an overloading coupling located in the dri... | 06/05/2007 |
| 7219726 | Method and apparatus to vibrate a downhole component An apparatus for use in a wellbore comprises a housing having a longitudinal axis and a mechanism having one or more impact elements adapted to move along the longitudinal axis in an oscillating manner to impart a back and forth force on the housing to vibrate the h... | 05/22/2007 |
| 7216723 | Pulse torque generator and power tool having the same A pulse torque generator utilizing a magnetic coupling, and an electric power tool provided with the pulse torque generator. The pulse torque generator includes an input shaft extending in its axial direction and having a hollow section providing a hollow space, and... | 05/15/2007 |
| 7213659 | Impact drill An impact drill includes a first ratchet together with a spindle and movable in an axial direction, and a second ratchet engageable with the first ratchet. The second ratchet can be moved in the axial direction, and rotated with a predetermined range in a rotational... | 05/08/2007 |
| 7207393 | Stepped drive shaft for a power tool A shaft comprises an input portion and a tang. The tang has a first section, a second section, and a radial bore. The second section is disposed between the first section and the input portion along an axis. A radial cross section of the first section is less than a... | 04/24/2007 |
| 7207394 | Intermediate and assembly assistance components for fluid driven tools and tools incorporating the same A flow guide configured for insertion in a cavity defined between an outer housing and a nested inner motor housing of a fluid driven tool. The flow guide defines a longitudinal axis and includes at least two longitudinal portions disposed parallel to the longitudin... | 04/24/2007 |
| 7198116 | Wholly air-controlled impact mechanism for high-speed energy-accumulating pneumatic wrench A wholly air-controlled impact mechanism invented for creating a more compact and powerful pneumatic wrench comprises a flying hammer, a pressure impulse generator and a pressure container containing the hammer and the generator. The main part of the flying hammer i... | 04/03/2007 |
| 7194939 | Pneumatic wrench having reinforced strength A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a support seat, a cam, a cover, and a hammer. Thus, the pivot shaft of the hammer has two opposite sides each formed with a reinforcing rib to rei... | 03/27/2007 |
| 7194938 | Angular impact wrench An angular impact wrench is disclosed. The angular impact wrench can comprise a lever that is rotatable about a pivot axis and a reciprocably movable ram that is operatively arranged with the lever to rotate the lever. The lever includes a concave contact surface th... | 03/27/2007 |
| 7191848 | Rolling hammer drill A hammer drill with rolling contact at the contact surfaces for transmission of axial force between a drive shaft and wave race. By using roller bearings, line contact is obtained. The area of contact is thus close to zero as opposed to a relatively large area in en... | 03/20/2007 |
| 7185713 | Air-driven screwdriver performs hole drilling, thread tapping and bolt tightening A novel air-driven screwdriver is integrally designed to perform three functions, hole drilling, thread tapping and bolt tightening with special characteristic in which a passive inner gear assembly is employed as a driver to replace the clutch as used by the prior ... | 03/06/2007 |
| 7182149 | Pneumatic wrench having reinforced strength A pneumatic wrench includes a pneumatic motor, a striking portion, and a drive shaft. The striking portion includes a support seat, a first pin, a second pin, a first hammer, and a second hammer. Thus, the locking strip of the first hammer and the locking strip of t... | 02/27/2007 |
| 7174971 | Clockwise or counterclockwise rotation control device of a pneumatic tool The present invention discloses a clockwise or counterclockwise rotation control device installed to a pneumatic tool uses pressurized air as power. The pneumatic tool comprises a main body of the pneumatic motor module, a rear cover module disposed at a rear end of... | 02/13/2007 |
| 7165631 | Pneumatic wrench having enhanced strength A pneumatic wrench includes a pneumatic motor, a striking portion, and a drive shaft. The striking portion includes a support seat, a first hammer, and a second hammer. Thus, the first hammer and the second hammer are driven by the fixed pins and the movable pins of... | 01/23/2007 |
| 7147063 | Double-ram striker assembly A double-ram striker assembly including a shaft anvil having a shaft body on which two jaw blocks are disposed and two ring-shaped ram bodies coaxially fitted on the shaft body. The inner circumferences of the ram bodies serve to respectively ram lateral faces of th... | 12/12/2006 |
| 7140282 | Pneumatic wrench having reinforced strength A pneumatic wrench includes a pneumatic motor, a striking mechanism, and a drive shaft. The striking mechanism includes a cylindrical support seat, a cam, a cover, and a hammer. The hammer has a protruding engaging portion and a reinforcing rib juxtaposed to the eng... | 11/28/2006 |
| 7131503 | Impact driver having a percussion application mechanism which operation mode can be selectively switched between percussion and non-percussion modes An impact driver capable of boring and having an excellent usability is provided. An anvil(8) is arranged so as to slightly move in the axial direction. A first cam(29) having cam gears(30, 30 . . . ) is externally provided at the anvil so as to... | 11/07/2006 |
| 7124839 | Impact driver having an external mechanism which operation mode can be selectively switched between impact and drill modes An impact driver in which a drill mode can be selected without fail is provided. In a hammer case, a connecting sleeve is provided so as to be slidable back and forth. At the backward position, the connecting sleeve engages with only a first engaging tooth provided ... | 10/24/2006 |
| 7121165 | Tool for wristwatch Substantially cylindrical head tube body, center tube body and tip tube body threadedly engage each other to thereby construct a tool main body of a tool for wristwatch. The through hole of the center tube body is provided with a partition part having a small-diamet... | 10/17/2006 |
| 7121175 | Wheel nut tool A device for use with a tool for rotating a wheel nut of a vehicle. The device is fittable to a diameter of a wheel to facilitate the turning of a wheel nut for loosening for removal of the wheel from the vehicle or for tightening the wheel to the vehicle. The devic... | 10/17/2006 |
| 7093670 | Impact drill An impact drill minimizing transmission of vibration to a handle gripped by a user's hand. A spindle extends through a main frame and is movable in its axial direction and rotatable about its axis. A first ratchet is rotatable and axially movable together with the s... | 08/22/2006 |
| 7089833 | Air actuated pneumatic impact wrench lug bolt tool The invention relates to a device utilizing compressed air for loosening and tightening fasteners that are located in hard to access areas. The device enables a single operator to stabilize the device while applying pressure via a pneumatic hammer to loosen or tight... | 08/15/2006 |
| 7083003 | Power tool with detachable drive end A rotary tool includes a housing structure with a plurality of apertures therein, drive mechanism disposed within the housing structure, a detachable drive end mechanism coupled to the drive mechanism, and a retaining structure received by the apertures. The drive m... | 08/01/2006 |
| 7073606 | Manual machine tool The invention is based on a power tool comprising toolholder (12, 102) driveable in at least rotary fashion via a drive motor and via a driven shaft (10, 98, 100), which comprises a workholding fixture (14) for attaching tools (16, 104) a... | 07/11/2006 |
| 7047845 | Wrench A hand operable wrench is described which comprises a wrench head at one end thereof, and a substantially metallic lever formed as a handle extending in a longitudinal direction from the wrench head. The wrench head has an imaginary axis of wrench rotation, and the ... | 05/23/2006 |
