| Patents for B25B 21 - Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose (7,850) |
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| 04/25/1990 | EP0213121B1 Fastener wrenching means |
| 04/24/1990 | US4919216 Automatic impact driver |
| 04/24/1990 | US4919022 Ratchet wrench |
| 04/24/1990 | US4919018 Hydraulic power wrench |
| 04/17/1990 | US4916986 Fluid operated wrench |
| 04/11/1990 | EP0362415A1 Hydraulic power screw driver |
| 04/11/1990 | EP0231377B1 Vibrating pipe wrench |
| 04/11/1990 | CN1041126A Portable screw driver having flexible extension shaft |
| 04/10/1990 | US4914987 Tube coupling tightening tool |
| 04/04/1990 | EP0361634A1 Hydraulic wrench |
| 04/03/1990 | US4913008 Torquing apparatus |
| 03/28/1990 | CN1007330B Improvement of screw tightening apparatus |
| 03/27/1990 | US4911039 Electric extension pole |
| 03/27/1990 | US4910992 Rivet installation tool and blind rivets for use therewith |
| 03/27/1990 | CA1267005A1 Apparatus for uncoupling the threaded connection of a pump impeller |
| 03/21/1990 | EP0359543A2 Flexible extension shaft for a screwdriver |
| 03/20/1990 | US4909105 Automated nut driving apparatus |
| 03/20/1990 | US4908926 Method of and apparatus for controlling nut runner |
| 03/06/1990 | US4906980 Detector of false rotation of power screwdriver |
| 03/06/1990 | US4905423 Electric rotary power tool apparatus holdable by hand during operation, kit comprising the same, and novel switch means therefor |
| 03/06/1990 | CA1266396A1 Arrangement for securing insulating material panels to a thin-walled base |
| 02/28/1990 | EP0355588A2 Stepwise rotation device for an element especially a screw of a two piece connection part for the coupling of two conduits under water |
| 02/20/1990 | US4901606 Apparatus for inserting and extracting light bulbs |
| 02/08/1990 | DE3826683A1 Device for mechanically screwing hinges into window frames |
| 02/06/1990 | US4898248 Hydraulic device |
| 02/01/1990 | DE3825711A1 Turning tool |
| 01/31/1990 | EP0353106A2 Oil pressure type impulse torque generator for wrench |
| 01/17/1990 | EP0351179A1 Torque adjusting mechanism for power driven rotary tools |
| 01/09/1990 | US4892013 Variable speed gearing in rotary electric tool |
| 01/03/1990 | EP0349482A2 Motor-driven hand tool |
| 12/27/1989 | CN2049990U Series assembling and disassembling tool for stud |
| 12/20/1989 | CN1038045A Device and process for screwing and unscrewing nut on coupling member |
| 12/20/1989 | CN1006140B Tension control method for nutrunner |
| 12/12/1989 | US4885963 Oscillating drive apparatus for working tool and working apparatus using the same |
| 12/12/1989 | US4885962 Pneumatic torque wrench for valve handwheels |
| 12/12/1989 | US4885961 Replacement of split-pin assemblies in nuclear reactor |
| 12/05/1989 | US4884995 Hydraulic torque impulse generator |
| 11/29/1989 | EP0344028A1 Device and method for screwing and unscrewing a nut in a connecting element |
| 11/29/1989 | EP0343296A2 Extension bit for powered screwdriver |
| 11/28/1989 | US4883130 Dual speed transmission for automatic assembly machine |
| 11/21/1989 | US4881435 Power tool for two step tightening of screw joints |
| 11/21/1989 | US4881433 Remote manipulable device for establishing a transport connection with a remote manipulable tool |
| 11/14/1989 | US4880713 Releasable battery pack cap and holder |
| 11/07/1989 | US4878405 Collet lock for power tool |
| 11/07/1989 | US4878404 Electric screwdriver |
| 11/02/1989 | DE3813325A1 Screwdriver element |
| 10/31/1989 | US4876929 Portable screw driver having flexible extension shaft |
| 10/25/1989 | EP0338406A2 Automatic self-advancing machine for applying inserts |
| 10/10/1989 | US4872230 Electrically powered automobile jack and nut remover |
| 10/04/1989 | EP0335593A2 Keyless chuck for rotary tool |
| 10/04/1989 | EP0335032A1 An Impact clutch |
| 09/27/1989 | EP0181894B1 Arrangement for fixing flat insulating materials to thin-walled support bases, especially heat-insulating panels or boards |
| 09/26/1989 | US4869139 Rotating driver with automatic speed and torque switching |
| 09/26/1989 | US4869131 Variable speed gearing in rotary electric tool |
| 09/20/1989 | EP0332839A1 Automatically charged screw driver |
| 09/19/1989 | US4867250 Pneumatic impact imparting tool |
| 09/19/1989 | US4867249 Driving and setting tool |
| 09/08/1989 | WO1989007997A1 Dual-mode corded/cordless system for power-operated devices |
| 09/05/1989 | US4862773 Collet type fastener removal tool |
| 08/30/1989 | EP0329852A2 Powered wrench |
| 08/16/1989 | CN2042781U Hydraulic spanner |
| 08/16/1989 | CN2042780U Nagative pressure motor scalper |
| 08/15/1989 | US4856389 Device for setting fastener elements and pins |
| 08/08/1989 | US4854916 Hydraulic torque impulse generator with bypass mechanism |
| 08/08/1989 | US4854197 Torque wrenches |
| 08/03/1989 | DE3843925A1 Hydraulic power driver |
| 08/03/1989 | DE3811776A1 Hydraulic power screwing device |
| 08/03/1989 | DE3802018A1 Working device operated by compressed gas |
| 07/27/1989 | DE3800394A1 Apparatus for performing screwing operations |
| 07/25/1989 | CA1257816A1 Portable power tool of an impulse type |
| 07/19/1989 | EP0324050A1 Torque Wrench |
| 07/12/1989 | CN2040838U Hydaulic spanner with function of measurement of screw pair |
| 07/11/1989 | US4846285 Air wrench |
| 07/11/1989 | US4846028 Fluid-operated wrench |
| 07/04/1989 | US4844177 Torque sensing, automatic shut-off and reset clutch for toggle controlled screwdrivers, nutsetters and the like |
| 07/04/1989 | US4843702 Apparatus for uncoupling the threaded connection of a pump impeller |
| 06/29/1989 | DE3818924A1 Power-driven screwing tool |
| 06/28/1989 | EP0321594A1 Electric rotary power tool apparatus holdable by hand during operation, kit comprising the same, and novel switch means therefor |
| 06/22/1989 | DE3742268A1 Electric tool having a device for accommodating and holding battery packs in and/or on the tool housing |
| 06/15/1989 | DE3837597A1 Drehmomentuebertragungseinrichtung, insbesondere fuer schraubwinden Drehmomentuebertragungseinrichtung, especially for screw jacks |
| 06/13/1989 | US4838364 Electrically powered screw tightening tool |
| 06/13/1989 | US4838133 Hydraulic pulse wrench |
| 06/13/1989 | US4838130 Power wrench |
| 06/08/1989 | DE3740083A1 Hydraulic power screwing device |
| 06/06/1989 | US4836296 Fluid pressure impulse nut runner |
| 06/06/1989 | US4836063 Bolt tightening tool |
| 05/30/1989 | US4835410 Dual-mode corded/cordless system for power-operated devices |
| 05/30/1989 | US4834192 Two-speed power tool |
| 05/30/1989 | CA1254774A1 Power-driven screwing head |
| 05/30/1989 | CA1254773A1 Depth-adjusting system for a power tool |
| 05/30/1989 | CA1254722A1 Method and tool for the freeing of parts held fast together |
| 05/11/1989 | DE3736413A1 Hand-held electric tool with drive spindle driven via a two- or multi-step reduction gearing |
| 05/09/1989 | US4828049 Portable handheld power-driven tool |
| 05/09/1989 | US4827810 Crowfoot tool |
| 05/09/1989 | US4827809 Compatible extension tip for an air ratchet adaptor |
| 05/03/1989 | DE3735007A1 Nut-screwing device |
| 05/03/1989 | CN1032635A Hand-held type miniature electric wrenching machine |
| 05/02/1989 | US4825730 Fluid operated wrench |
| 04/25/1989 | US4823653 Free spinning, self-locking threaded fastener, and method and tool for setting it |
| 04/25/1989 | US4823616 Torque and angular displacement sensing in yield threshold controlled wrenches |