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| Number | Title | Issue Date |
| 7900714 | Power tool with torque clutch A clutch arrangement for use in a power tool having a multi-speed transmission assembly. The clutch arrangement includes a clutch member and a follower. The clutch member is coupled to a member of the transmission assembly that is proximate the torsional input of th... | 03/08/2011 |
| 7635032 | Hand-held tool comprising a shaft and a lifting bearing which is mounted on the shaft A hand-held drill hammer has a housing, a shaft (12) connected to a drive shaft (30), and a lifting bearing (14). The lifting bearing (14) is supported and the shaft (12) for converting rotary motion into a reciprocating motion. In... | 12/22/2009 |
| 7537064 | Multispeed power tool transmission A power tool with a housing, an electric motor having an output shaft that provides a first output torque, a first gear reduction element driven by the output shaft to provide a second output torque, a second gear reduction element, which can be operated in active a... | 05/26/2009 |
| 7410441 | Multispeed power tool transmission A portable power tool having a relatively compact multi-stage, three-speed transmission and a related method for operating a power tool with a multi-stage, three-speed transmission. ... | 08/12/2008 |
| 7404781 | Multispeed power tool transmission A method for operating a portable power tool having a multi-stage, three-speed transmission. ... | 07/29/2008 |
| 7331496 | Hammer drill A hammer drill (2) includes a clockwise and counterclockwise driven tool spindle (28), a drive pinion (70) operatively connectable with the tool spindle (28) for transmitting a torque thereto, a separate control handle (6) for sele... | 02/19/2008 |
| 7322427 | Power impact tool It is an object of the present invention to provide an effective technique to improve ease of operation of the power impact tool. The power tool of the present invention includes a tool body, a tool bit, a motor, first and second switches and a mode changing mechani... | 01/29/2008 |
| 7270194 | Drilling machine with pneumatic control A pneumatic drilling machine is provided, comprising a pneumatic motor, a circuit for connecting the motor to a source of compressed air, a tool holder spindle, and a drive mechanism. The drive mechanism comprises a coupling shaft which can be moved to select a firs... | 09/18/2007 |
| 7223195 | Multispeed power tool transmission A portable power tool with a housing, a motor having a motor output member, a driven member and a transmission. The transmission, which is located in the housing, is configured to receive a rotary input from the motor output member and to produce a rotary output tha... | 05/29/2007 |
| 7220211 | Multispeed power tool transmission A multi-speed transmission assembly for a rotary power tool. The transmission assembly includes a plurality of transmission stages, with at least two of the transmission stages employing a movable reduction element that permits the transmission stage to be operated ... | 05/22/2007 |
| 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 |
| 7118507 | Automatic reduction-ratio changing apparatus An automatic reduction-ratio changing apparatus comprises a planetary gear mechanism including a sun gear, planet gears, and an internal gear. When a load, which exceeds a predetermined torque, is applied to the internal gear, a pawl of a lock lever is engaged with ... | 10/10/2006 |
| 7108079 | Electric power tool A cover which covers outer peripheries of fastening screws are disposed on an outer periphery of a hammer case. A stopper which detachably positions and fixes the cover to the outer periphery of the hammer case is disposed. ... | 09/19/2006 |
| 7101300 | Multispeed power tool transmission A portable power tool with a housing, a motor having a motor output member, a driven member and a transmission. The transmission, which is located in the housing, is configured to receive a rotary input from the motor output member and to produce a rotary output tha... | 09/05/2006 |
| 7080578 | Hand tool with impact drive and speed reducing mechanism A power driven tool useful for tightening and loosening a mechanical fastener includes an impact mechanism. Preferably, the tool is pneumatic and includes a ratchet head and an impact device for providing additional torque to the ratchet head. A planetary reduction ... | 07/25/2006 |
| 7063173 | Spindle unit with switchable gear, and method for using the spindle unit A system and a method are described that facilitate gear switching of a motor-driven spindle. A spindle head shaft is driven by a drive shaft via a gear mechanism in a first gear position. The drive shaft, including a rotor, can be switched from the first gear posit... | 06/20/2006 |
| 7048077 | Drilling machine with pneumatic control A pneumatic drilling machine is provided, comprising a pneumatic motor, a circuit for connecting the motor to a source of compressed air, a tool holder spindle, and a drive mechanism. The drive mechanism comprises a coupling shaft which can be moved to select a firs... | 05/23/2006 |
| 7008151 | Power driver having geared tool holder A power driver includes a motor and a spindle having a distal end thereof opposite the motor. The distal end has an axial bore formed therein. A gear assembly is disposed operatively between the motor and the spindle so that the motor rotationally drives the spindle... | 03/07/2006 |
| 6984188 | Multispeed power tool transmission A multi-speed transmission assembly for a rotary power tool. The transmission assembly includes a plurality of transmission stages, with at least two of the transmission stages employing a movable reduction element that permits the transmission stage to be operated ... | 01/10/2006 |
| 6976545 | Device for switching operating mode for hand tool A device for switching operating modes for an at least partially rotational and percussive hand tool machine having an overload clutch, which is arranged between a hollow driving guide cylinder (3) containing an axially striking impact piston (2) and a... | 12/20/2005 |
| 6939262 | Multiple gearing switch device A gearing switch device includes a switch assembly that is switched to one of positions to engage one of the gears in an idle gear set with an input gear and a transferring gear of a speed reduction device. The transferring gear drives a ring gear that is engaged wi... | 09/06/2005 |
| 6933689 | Power tools It is an object of the invention to provide a technique to effectively prevent a power tool from being adversely affected when a battery is removed from the power tool. According to the present invention, a power tool is provided that includes a tool bit, a motor th... | 08/23/2005 |
| 6907942 | Percussion tool In a percussion tool such as an electric hammer or a hammer drill in which the axial direction of a motor 8 is substantially perpendicular to that of a tool bit 1 attached to a tool holder 2, a motor housing 3 is made of a hard material s... | 06/21/2005 |
| 6902013 | Electric power tool with a plurality of operational component groups accommodated in separate housings An electric power tool has a plurality of operational component groups; a plurality of separate housings which accommodate the operational component groups, the housings being couplable with one another in series, at least one of the housings being composed of a syn... | 06/07/2005 |
| 6902011 | Variable torque impact wrench Disclosed herein is a fluid control system for varying the power available to a fluid powered tool, a hydraulically driven impact wrench. The system disclosed herein varies power available to the tool by use of a bypass mechanism that is downstream of a directional ... | 06/07/2005 |
| 6868919 | Switching device for multifunctional hand-held machine tool The object of the invention is a device, intended for a multifunctional, hand-held tool machine, for example, an electric combination hammer, for the ON/OFF switching or changeover of individual system functions when changing the processing mode, for example, from â... | 03/22/2005 |
| 6814153 | Hand power tool A hand held power tool has a housing, a drive, a mechanical striking mechanism with a striker, a drive element for driving the striker in its striking movement and having at least one curved track with raised and depressed portions, and a sensing element in operativ... | 11/09/2004 |
| 6814154 | Power tool having automatically selective driving direction A power tool includes a housing rotatably secured to a seat and having an internal gear and having a bore for rotatably receiving a driving shaft. A motor is secured to the seat and includes a spindle having a pinion engaged with the internal gear for driving the ho... | 11/09/2004 |
| 6796921 | Three speed rotary power tool The present invention discloses a portable electric rotary power tool having a plurality of gear reduction elements connected to a motor to receive a first output torque and drive an output spindle. At least two of the gear reduction elements have a common input mem... | 09/28/2004 |
| 6655470 | Speed changing mechanism for tools A speed changing mechanism includes two planetary gear sets and a movable gear that is controlled to be movably engaged with one of the two planetary gear sets to generate two different speeds. A third speed can be output when the movable gear is moved to... | 12/02/2003 |
| 6655473 | Hand tool with an adjustable rotational speed and torsion force A hand tool with an adjustable rotational speed and torsion force includes a shaft rotatably received in a body of the hand tool and driven by a motor that is mounted in the body. A first planet gear set is longitudinally connected to one end of the shaft... | 12/02/2003 |
| 6578643 | Pneumatic ratchet drive wrench A pneumatic ratchet drive wrench of the present invention includes a pair of single springs that each bias a corresponding pawl into engagement with an output member and inhibit counter-rotation of the output member opposite the corresponding pawl. The pa... | 06/17/2003 |
| 6550546 | Spindle lock and chipping mechanism for hammer drill A hammer drill has a motor which drives an axially displaceable intermediate gear mounted in an intermediate gear arrangement. An impact mechanism is formed by including interacting impact cams between either the intermediate gear and the housing, or the ... | 04/22/2003 |
| 6457535 | Impact rotary tool An impact rotary tool includes an output shaft having an anvil at an end portion thereof, a hammer having a projecting portion applying an impact force to the anvil under a predetermined condition, a driving shaft connected to the hammer through a cam mec... | 10/01/2002 |
| 6431289 | Multi-speed power tool transmission A multi-speed transmission assembly for a rotary power tool. The transmission assembly includes a plurality of transmission stages, with at least two of the transmission stages employing a movable reduction element that permits the transmission stage to b... | 08/13/2002 |
| 6250399 | Pneumatic tool with a reverse valve having an overdrive The invention is a pneumatic tool with a reverse valve having an overdrive. In particular, the pneumatic tool includes a housing, a rotor, rotatably mounted within the housing, an output shaft operatively coupled to the rotor, and pressure chambers define... | 06/26/2001 |
| 6220368 | Powered surgical instrument having locking systems and a clutch mechanism A surgical instrument having a locking mechanism for preventing an output shaft of the surgical instrument from rotating and a further locking mechanism for mounting a battery pack to a distal end of a housing of the surgical instrument. The surgical inst... | 04/24/2001 |
| 6196076 | Knob switch device A kind of knob switch device relates to a clutch control device setting inside the decreasing box, and relates to a switch device setting outside the decreasing box. The clutch control device comprises the switch block, the switch set, the vibration block... | 03/06/2001 |
| 5918686 | Pneumatic rotary tool A pneumatic rotary tool capable of operating in forward and reverse directions includes a housing and an output shaft projecting from the housing for transmitting torque to an object. An air motor drives rotation of the output shaft in the forward and rev... | 07/06/1999 |
| 5692575 | Reversible power wrench A reversible power wrench includes a housing (10), a rotation motor, and a power transmission coupling the motor to an output shaft (21), and further includes a reduction gearing (20) with first planetary gearing (28) for transferring torque in the "forwa... | 12/02/1997 |
