| Patents for B25B 21 - Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose (7,850) |
|---|
| 01/06/1998 | US5704433 Power tool and mechanism |
| 12/30/1997 | US5701961 Electronic push to start nutrunner |
| 12/23/1997 | US5699702 Wrenching tool with free-floating, self-relieving anti-rotation key |
| 12/16/1997 | US5697459 Directional self-propelled drill |
| 12/16/1997 | US5697266 Line fitting orientation guide for a fitting manipulating tool including a split socket and combination thereof |
| 12/10/1997 | EP0811466A2 Improvements in or relating to power tools |
| 12/10/1997 | CN2269928Y 电动扳手 Electric wrench |
| 12/03/1997 | EP0809760A1 Releasable coupling and tool therefor |
| 12/03/1997 | EP0809558A1 Gear shifting power tool |
| 12/03/1997 | CN2269272Y Electric driven spanners |
| 12/03/1997 | CN2269271Y Improved electric driven screw driver |
| 12/02/1997 | US5692575 Reversible power wrench |
| 12/02/1997 | US5692419 Deformable locking fastener system and method of use |
| 12/02/1997 | US5692418 Nut runner for removing and installing reactor pressure vessel head closure nuts |
| 11/26/1997 | EP0808694A1 Silencer mechanism for use in an impact wrench |
| 11/26/1997 | CN2268603Y Portable electric spanner |
| 11/25/1997 | US5690458 Hydraulic bolt tensioner |
| 11/19/1997 | EP0807495A1 Universal socket device |
| 11/18/1997 | US5689434 Monitoring and control of fluid driven tools |
| 11/18/1997 | US5687802 Power hand tool with rotatable handle |
| 11/15/1997 | CA2184854A1 Universal socket device |
| 11/13/1997 | DE19719736A1 Cordless electric hand-tool for structural steel assembly |
| 11/05/1997 | EP0804315A2 Machine-tool |
| 11/04/1997 | US5682800 For driving a screw to a depth into a workpiece |
| 11/04/1997 | CA2079126C Barrel assembly and composite stress plate |
| 10/30/1997 | WO1997039857A1 Hyraulic power wrench |
| 10/28/1997 | US5682025 Load alternation loading device |
| 10/23/1997 | DE19716132A1 Device for consecutive driving=in of screws held in belt |
| 10/22/1997 | EP0802023A1 Pneumatic power wrench |
| 10/21/1997 | US5678961 Quick change adapter |
| 10/14/1997 | US5676028 Socket adapter device |
| 10/09/1997 | DE19707923A1 Device for transmitting torque in rotating tools |
| 10/08/1997 | EP0799113A1 Screw driving-in process |
| 10/07/1997 | US5673816 Roofing washer magazine for barbed roofing washers |
| 10/07/1997 | US5673759 For use with a fluid-filled impulse tool |
| 10/07/1997 | US5673758 Low-noise impact screwdriver |
| 10/02/1997 | DE19612774A1 Heating circuit valve installation mounting tool |
| 09/30/1997 | US5672922 For driving a hand tool |
| 09/18/1997 | WO1997033722A1 Power nutrunner with torque release clutch and a setting tool |
| 09/18/1997 | WO1997033721A1 Power nutrunner |
| 09/17/1997 | EP0766610A4 Pulse tool |
| 09/16/1997 | US5668328 Method and apparatus for hydraulically tightening threaded fasteners |
| 09/02/1997 | US5662174 Battery powered palm ratchet tool |
| 09/02/1997 | US5662011 Power drill housing extension coupling |
| 09/02/1997 | US5662009 Drive mechanism providing an oscillatory-rotational-drive input and a reversible rotational-driven-output |
| 08/28/1997 | DE19613444C1 Screwed-joint-tightening and releasing aid |
| 08/27/1997 | EP0791434A1 Clamping apparatus with a gear reducer |
| 08/20/1997 | CN2259973Y Double-energy storage structure for striking and returning to original position |
| 08/14/1997 | WO1997028927A1 Screw driving method and screw driving device |
| 08/14/1997 | DE19705378A1 Coupling mechanism for use in powered tool |
| 08/06/1997 | EP0787931A1 Automatic variable transmission for power tool |
| 08/05/1997 | US5653296 Switch-locking mechanism for screw tightener |
| 07/30/1997 | EP0785846A1 Handle for a pneumatic power tool |
| 07/30/1997 | EP0725709B1 Tightening spanner |
| 07/30/1997 | CN1155865A Toggled breakout wrench |
| 07/29/1997 | US5651647 Auxiliary chuck and screwdriver for electric drills |
| 07/29/1997 | US5651419 Powered hand tool |
| 07/22/1997 | US5650573 Motor driven screwdriver |
| 07/17/1997 | WO1997025540A1 A method and manufacture of an axial tensioned bolt |
| 07/17/1997 | WO1997024991A1 A driver |
| 07/10/1997 | WO1997024205A1 Power drill housing extension coupling |
| 07/08/1997 | US5645130 Hydraulic torque impulse mechanism |
| 07/03/1997 | WO1997023326A1 Hand-held power tool with on/off switch in rear part of ergonomic handle |
| 07/01/1997 | CA2120856C Quick release mechanism for tools such as socket wrenches |
| 06/26/1997 | DE19653211A1 Pneumatic screw driver |
| 06/24/1997 | US5641258 Recessed screw head |
| 06/19/1997 | WO1997021524A1 Portable hand complex machine |
| 06/19/1997 | WO1997021512A1 Drill bit adaptor tool |
| 06/11/1997 | EP0778108A1 Drilling tool |
| 06/11/1997 | CN2255898Y Changable structure of electric tools |
| 06/10/1997 | US5637968 For torque overshoot in an electric power tool |
| 06/10/1997 | US5637125 Air filter assembly for pneumatic tool |
| 06/10/1997 | US5636698 Tube nut wrench |
| 06/10/1997 | CA2192285A1 Drill bit |
| 06/04/1997 | CN2255336Y Clutching and driving device for simple screw assembling-disassembling electric tool |
| 05/28/1997 | EP0732984B1 Hydraulic threaded-bolt clamping device |
| 05/22/1997 | WO1997018062A1 Continuous screw driving and tightening machine |
| 05/22/1997 | WO1997018061A1 Coupling device and rotary drive tool therefor |
| 05/21/1997 | EP0774325A2 Screw driving and turning machine |
| 05/21/1997 | EP0773854A1 Power screwdriver and process for tightening screws |
| 05/21/1997 | CN2254393Y Simple all-automatic electric wrench |
| 05/14/1997 | EP0581933B1 Powered hand tool |
| 05/09/1997 | WO1997016287A1 Power screw driver with damping device between covered grip and housing |
| 05/07/1997 | EP0771389A2 Toggled breakout wrench |
| 05/06/1997 | US5626198 Pneumatic torque impulse tool |
| 04/30/1997 | CN1148531A Screw screwing-up tool |
| 04/23/1997 | EP0712461A4 Rotary piston driving mechanism |
| 04/23/1997 | CN1147993A Torsional force device for adjustment and twisting |
| 04/22/1997 | US5622230 Rotary impact wrench clutch improvement |
| 04/17/1997 | WO1997013619A1 Power-assisted spanner |
| 04/09/1997 | EP0766610A1 Pulse tool |
| 04/08/1997 | US5617924 Arrangement for tightening screw connections |
| 04/08/1997 | US5617771 For controlling operation of a hydraulic tool |
| 04/03/1997 | WO1997011817A1 Hydraulic impulse tool with enhanced fluid seal |
| 04/03/1997 | CA2233073A1 Hydraulic impulse tool with enhanced fluid seal |
| 04/02/1997 | CN2250842Y Adjustable torsion moment electric impact wrench |
| 04/01/1997 | US5615587 Deep-socket driver apparatus |
| 03/27/1997 | WO1997010929A1 Power hand tool with rotatable handle |
| 03/27/1997 | CA2232684A1 Power hand tool with rotatable handle |
| 03/26/1997 | CN1145843A Automatic 12V electrical turning machine for mounting and dismounting tyre of heavy truck |