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Class Information
Number: 81/469
Name: Tools > Wrench, screwdriver, or driver therefor > Responsive to torque on work > Means for regulating motor
Description: Wrench or screwdriver including means which is responsive to the amount of torque on the work and regulates the power output of a motor driving the work-contacting portion of the wrench or screwdriver.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7311027 |
Electric screwdriver |
Dec. 25, 2007 |
| 7210541 |
Transducerized rotary tool |
May. 1, 2007 |
| 7185562 |
Disposable battery powered screw driver, locking mechanism, and accessories |
Mar. 6, 2007 |
| 7090030 |
Tranducerized torque wrench |
Aug. 15, 2006 |
| 7082866 |
Ratcheting torque-angle wrench and method |
Aug. 1, 2006 |
| 6871153 |
Dynamic calibration qualifier |
Mar. 22, 2005 |
| 6840138 |
Device for screwing on caps |
Jan. 11, 2005 |
| 6836614 |
Electrical power tool having a motor control circuit for providing control over the torque output of the power tool |
Dec. 28, 2004 |
| 6523442 |
Torque tool assembly |
Feb. 25, 2003 |
| 6390205 |
Power tool system with programmable control unit |
May. 21, 2002 |
| 6247387 |
Fastening apparatus |
Jun. 19, 2001 |
| 6164165 |
Tube spinner |
Dec. 26, 2000 |
| 6109149 |
Screw setting tool |
Aug. 29, 2000 |
| 6105475 |
Tightening device |
Aug. 22, 2000 |
| 6053080 |
Device for tightening bolt and/or nut |
Apr. 25, 2000 |
| 5953965 |
Device for tightening bolt and nut |
Sep. 21, 1999 |
| 5881613 |
Screwdriver having disengaging mechanism |
Mar. 16, 1999 |
| 5816121 |
Cordless fastening tool |
Oct. 6, 1998 |
| 5754019 |
Method and circuit arrangement for operating an electric motor |
May. 19, 1998 |
| 5672922 |
Commutator motor |
Sep. 30, 1997 |
| 5637968 |
Power tool with automatic downshift feature |
Jun. 10, 1997 |
| 5490439 |
Nut tightening device |
Feb. 13, 1996 |
| 5457866 |
Bolt-tightening method using an impact wrench |
Oct. 17, 1995 |
| 5404775 |
Right angle fastening device |
Apr. 11, 1995 |
| 5361852 |
Screwing apparatus |
Nov. 8, 1994 |
| 5353882 |
Screwing apparatus |
Oct. 11, 1994 |
| 5203242 |
Power tool for two-step tightening of screw joints |
Apr. 20, 1993 |
| 5195406 |
Power wrench |
Mar. 23, 1993 |
| 5172774 |
Axially compact torque transducer |
Dec. 22, 1992 |
| 5154242 |
Power tools with multi-stage tightening torque control |
Oct. 13, 1992 |
| 5115701 |
Drive mechanism and strain gauge mounting for a nutrunner appliance |
May. 26, 1992 |
| 5094301 |
Programmable pulsed torque recovery system |
Mar. 10, 1992 |
| 5044234 |
Electrical screwdriver |
Sep. 3, 1991 |
| 5014794 |
Power driven tool and drive system therefor |
May. 14, 1991 |
| 4987806 |
Electronic control circuitry for a nutrunner |
Jan. 29, 1991 |
| 4966057 |
Power wrench |
Oct. 30, 1990 |
| 4908926 |
Method of and apparatus for controlling nut runner |
Mar. 20, 1990 |
| 4898249 |
Rotary electric tool |
Feb. 6, 1990 |
| 4881435 |
Power tool for two step tightening of screw joints |
Nov. 21, 1989 |
| 4858312 |
Torque control for automatic connector assembly tool |
Aug. 22, 1989 |
| 4813312 |
Power-wrench, a boiling spindle and an operational method |
Mar. 21, 1989 |
| 4791838 |
Apparatus and method for determining torque, presenting digital torque readout and automatic cycling and termination of wrench operation in a torque wrench system |
Dec. 20, 1988 |
| 4721169 |
Electric driver with torque-adjustable clutch mechanism |
Jan. 26, 1988 |
| 4709182 |
Method and apparatus for tightening or loosening screw-type connections |
Nov. 24, 1987 |
| 4653358 |
Tools for use in tightening or removing screw-threaded fasteners |
Mar. 31, 1987 |
| 4631992 |
Screwdriver |
Dec. 30, 1986 |
| 4617843 |
Electrically-operated driver |
Oct. 21, 1986 |
| 4562389 |
Automatic screwdriver or torquing tool control system |
Dec. 31, 1985 |
| 4502549 |
Spring-coupled power screwdriver |
Mar. 5, 1985 |
| 4501335 |
Method and apparatus for use in drill string make up |
Feb. 26, 1985 |
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