| 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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| 03/24/1992 | US5097730 Inline ratcheting tool |
| 03/24/1992 | US5097555 Drill bit and screw driver kit |
| 03/17/1992 | US5095780 Pressure-operated power wrench |
| 03/10/1992 | US5094133 Screwdriver with switch-off means for screw-in depth and screw-in torque |
| 03/05/1992 | WO1992003261A1 Adjustable wrench |
| 03/05/1992 | DE4027582A1 Power driven adjuster for vehicle track rods - comprises set of discs operated by gears and driven by motor |
| 03/03/1992 | US5092410 Adjustable pressure dual piston impulse clutch |
| 02/25/1992 | US5090545 Screw gun nose cone adapter |
| 02/12/1992 | EP0470741A1 Screw fastening device |
| 02/12/1992 | CN2095743U 电气冲击扳手 Electric Impact Wrench |
| 02/05/1992 | EP0469386A1 Hand power screwdriver |
| 01/29/1992 | EP0468859A1 Screwing tool with predeterminable torque |
| 01/29/1992 | EP0468614A1 Pivotable connection for fluid operated tool |
| 01/28/1992 | US5083990 Two-speed power transmission for a power tool |
| 01/28/1992 | US5083620 Cordless power driven tool |
| 01/28/1992 | US5083619 Powered impact wrench |
| 01/28/1992 | US5083358 Method of preventing twisted-off bolt head while tightening a bolt |
| 01/28/1992 | CA2043792A1 Automatic assembly machine with steering/up-down control handle |
| 01/22/1992 | CN2093773U Mounting or dismounting machine for wheel nut and saddle nut |
| 01/22/1992 | CN2093724U Hydraulic device for assembling or desassembling fasteners |
| 01/21/1992 | US5082066 Torque impulse delivering power tool |
| 01/14/1992 | US5080181 Pressure detecting device for torque control wrench |
| 01/14/1992 | US5080180 Torque impulse power tool |
| 01/08/1992 | EP0465450A2 Hydraulic torque impulse generator |
| 01/02/1992 | EP0463521A1 Method and device for controlling the working of electrically powered hand-tools |
| 12/31/1991 | US5076120 Electric wrench |
| 12/27/1991 | EP0462835A2 Pneumatic collar installation tool |
| 12/27/1991 | EP0462257A1 Die chuck for multiple-cornered ends of tool spindles. |
| 12/25/1991 | CN2091209U Electron electric impact screw gun |
| 12/25/1991 | CN2091208U Motorized spanner for gasoline engine |
| 12/22/1991 | CA2045221A1 Pneumatic collar installation tool |
| 12/11/1991 | EP0460592A1 Hydraulically impulsed wrench |
| 12/11/1991 | CN2090306U Torque mechanism for electric tool |
| 12/10/1991 | US5070750 Torque limiting apparatus |
| 12/10/1991 | US5070749 Tool for use in loosening or tightening vehicle wheel fasteners |
| 12/03/1991 | US5069861 Apparatus for the remote unscrewing and extraction of an assembly screw |
| 11/26/1991 | CA1292376C Extension device for power screwdriver |
| 11/23/1991 | WO1991017869A1 Torque wrench |
| 11/23/1991 | CA2083495A1 Torque wrench |
| 11/22/1991 | CA2142588A1 Power tool |
| 11/22/1991 | CA2142587A1 Ratchet tool |
| 11/22/1991 | CA2142586A1 Ratchet tool |
| 11/20/1991 | CN1056332A Power tongs with openable jaws |
| 11/06/1991 | EP0454852A1 Motion converting mechanism and revolving tool |
| 11/06/1991 | CN2088063U Distance mounting and removing machine for saddle nuts |
| 11/05/1991 | US5062491 Apparatus for controlling nut runner |
| 10/30/1991 | CN2087556U Hydraulic assembling/disassembling fastener device with power source |
| 10/29/1991 | US5060772 Power-operated tool |
| 10/29/1991 | US5060733 Power-driven screwing tool |
| 10/22/1991 | US5058929 Mechanized fluid connector and assembly tool system with ball detents |
| 10/22/1991 | US5058464 Roof fastener installation machine |
| 10/17/1991 | WO1991015338A1 Torque wrench |
| 10/17/1991 | WO1991015337A1 Power wrench |
| 10/15/1991 | US5056384 Torque wrench |
| 10/08/1991 | USRE33711 Ratchet wrench |
| 10/08/1991 | US5054563 Electrical hand tool |
| 10/02/1991 | EP0449766A1 Tool for beating down of fasteners in hard material |
| 10/02/1991 | CN2085706U Hydraulic controlled torsion spanner |
| 10/02/1991 | CN2085705U Electric spanner |
| 10/02/1991 | CN1054929A Device for hammering fastening elements into hard material |
| 10/01/1991 | US5052249 Bolt wrench |
| 09/30/1991 | WO1991014541A1 Adjustable pressure dual piston impulse clutch |
| 09/26/1991 | DE4008750A1 Fixing device-driving tool - incorporates rotary drill and bolt-setting mechanism |
| 09/25/1991 | EP0448306A2 Torque wrench |
| 09/25/1991 | CN1014035B Tool, esp. for drawind of blind rivets provided with upsetting pins, but also for drilling and screw driving, as well as rivet and drill intended for use in the tool |
| 09/24/1991 | CA1289392C Torque wrenches |
| 09/21/1991 | CA2038694A1 Torque wrench |
| 09/20/1991 | CA2038483A1 Tool for driving fastening elements into hard receiving materials |
| 09/03/1991 | US5044233 Depth adjuster for rotary tools such as screwdrivers |
| 09/03/1991 | US5044225 Pneumatic nut installation tool |
| 09/03/1991 | CA1288263C Tool, especially for drawing of blind rivets provided with upsetting pins, but also for drilling and screw driving, as well as a rivet and a drillintended for use in the tool |
| 08/20/1991 | US5040277 Combined installation and swaging tool |
| 08/14/1991 | EP0441758A2 Torque impulse delivering power tool |
| 08/13/1991 | US5038869 Fatigue-resistant spindle end |
| 08/08/1991 | WO1991011295A1 Automatic screwer |
| 07/30/1991 | US5035161 Wrench |
| 07/25/1991 | WO1991010541A1 Die chuck for multiple-cornered ends of tool spindles |
| 07/25/1991 | WO1991010540A1 Power tool |
| 07/25/1991 | WO1991010539A1 Nut runner tooling |
| 07/23/1991 | US5033552 Multi-function electric tool |
| 07/18/1991 | DE4042154A1 Screwdriver driven by pressure medium - has medium acting on only part or on whole area of actuating piston |
| 07/18/1991 | DE4042070A1 Hydraulic screwdriver operating mechanism - comprises piston and cylinder aggregate activating lever which controls ring in head |
| 07/17/1991 | EP0437060A2 Dual mode rotary power tool |
| 07/16/1991 | US5031925 Keyless chuck for rotary tool |
| 07/10/1991 | CA2032208A1 Dual mode rotary power tool with adjustable output torque |
| 07/09/1991 | US5029497 Continuous ratchet drive |
| 06/26/1991 | EP0433924A2 Combined installation and swaging tool |
| 06/25/1991 | US5025903 Dual mode rotary power tool with adjustable output torque |
| 06/25/1991 | US5025541 Device and a process for screwing and unscrewing a nut on a coupling member |
| 06/19/1991 | EP0432884A2 Power wrench |
| 06/11/1991 | US5022289 Ratchet tool with flattened pocket |
| 06/11/1991 | US5022131 Tool bit selection device |
| 05/23/1991 | DE3938244A1 Quick-change tool adaptor - is for portable drill or screwdriver and has drill fitted in adaptor with shank end entering quick-change chuck |
| 05/21/1991 | US5017109 Cylinder and housing assembly for pneumatic tool |
| 05/21/1991 | US5016502 Power wrench |
| 05/21/1991 | US5016501 Automatic shaft lock |
| 05/15/1991 | EP0427510A1 Power tool incorporating a two speed gear system |
| 05/14/1991 | US5015129 Adapter for battery-powered screwdriver to attach drill chuck |
| 05/14/1991 | US5014794 Power driven tool and drive system therefor |
| 05/14/1991 | US5014793 Variable speed DC motor controller apparatus particularly adapted for control of portable-power tools |