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Class Information
Number: 81/470
Name: Tools > Wrench, screwdriver, or driver therefor > Responsive to torque on work > Means for regulating motor > Fluid motor
Description: Wrench or screwdriver in which the motor is operated by a fluid substance which does not alter in chemical composition while in the motor.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6382059 |
Torque wrench system |
May. 7, 2002 |
| 6205894 |
Automatic stop device for screw striking machine |
Mar. 27, 2001 |
| 5974919 |
Screwing device for ultrasound-controlled tightening of screw connections |
Nov. 2, 1999 |
| 5898379 |
Wireless cycle monitoring system for power tools |
Apr. 27, 1999 |
| 5671679 |
Fully automatic, multiple operation rail maintenance apparatus |
Sep. 30, 1997 |
| 5186262 |
Powered tool apparatus |
Feb. 16, 1993 |
| 5181575 |
Impact wrench having torque controlling faculty |
Jan. 26, 1993 |
| 5159987 |
Valve construction for automatic shut-off screwdrivers and the like |
Nov. 3, 1992 |
| 5129465 |
Screw tightening power tool |
Jul. 14, 1992 |
| 5082066 |
Torque impulse delivering power tool |
Jan. 21, 1992 |
| 5060771 |
Adjustable automatic shut-off mechanism for lever or trigger controlled air tool |
Oct. 29, 1991 |
| 5060772 |
Power-operated tool |
Oct. 29, 1991 |
| 5005654 |
High torque hydraulic shoe bolt wrench |
Apr. 9, 1991 |
| RE33526 |
Power tongs and control system |
Jan. 29, 1991 |
| 4941362 |
Torque and angular displacement sensing in controlled wrenches |
Jul. 17, 1990 |
| 4922436 |
Method and system for the automated driving of parts and device used therein |
May. 1, 1990 |
| 4898248 |
Hydraulic device |
Feb. 6, 1990 |
| 4887499 |
Power screwdriver with torque limiter |
Dec. 19, 1989 |
| 4880064 |
Torque sensing, automatic shut-off and reset clutch for screwdrivers, nutsetters and the like |
Nov. 14, 1989 |
| 4844177 |
Torque sensing, automatic shut-off and reset clutch for toggle controlled screwdrivers, nutsetters and the like |
Jul. 4, 1989 |
| 4823616 |
Torque and angular displacement sensing in yield threshold controlled wrenches |
Apr. 25, 1989 |
| 4813492 |
Low pressure shut off device contained within a pneumatic tool |
Mar. 21, 1989 |
| 4805404 |
Portable pneumatic machine having embodied control electronics |
Feb. 21, 1989 |
| 4700787 |
Power tong torque control |
Oct. 20, 1987 |
| 4696206 |
Torque wrench |
Sep. 29, 1987 |
| 4679469 |
Power tongs controller with persisting torque |
Jul. 14, 1987 |
| 4639996 |
Screw fastening method |
Feb. 3, 1987 |
| 4631992 |
Screwdriver |
Dec. 30, 1986 |
| 4625597 |
Screw driving apparatus |
Dec. 2, 1986 |
| 4579024 |
Power tongs and control system |
Apr. 1, 1986 |
| 4552041 |
Power tongs control system |
Nov. 12, 1985 |
| 4522269 |
Dual motor torque delivering tool |
Jun. 11, 1985 |
| 4501176 |
Automatic threaded nut installation and torquing system |
Feb. 26, 1985 |
| 4484871 |
Torque delivering tool with dual motor drive |
Nov. 27, 1984 |
| 4480699 |
Compressed-air screwdriver with shutoff bypass means |
Nov. 6, 1984 |
| 4467877 |
Power tool, in particular a hand-held compressed air screwdriver |
Aug. 28, 1984 |
| 4459728 |
Screw clamp pin extractor |
Jul. 17, 1984 |
| 4454790 |
Bolt stretch measurement device |
Jun. 19, 1984 |
| 4442738 |
Automatic push-to-start screwdriver |
Apr. 17, 1984 |
| 4427077 |
Portable fastening tool with manual turn on and automatic shut off |
Jan. 24, 1984 |
| 4418764 |
Fluid impulse torque tool |
Dec. 6, 1983 |
| 4418765 |
Power-driven screwdriver with a torque control |
Dec. 6, 1983 |
| 4379492 |
Torque control apparatus for pneumatic impact wrench |
Apr. 12, 1983 |
| 4346765 |
Speed responsive motor shutoff mechanism for fluid operated tool |
Aug. 31, 1982 |
| 4320806 |
Power tool, in particular a hand-held compressed air screw driver |
Mar. 23, 1982 |
| 4307784 |
Shut-off apparatus for pneumatic driven tools |
Dec. 29, 1981 |
| 4305472 |
Apparatus for recording and limiting torque |
Dec. 15, 1981 |
| 4280380 |
Tension control of fasteners |
Jul. 28, 1981 |
| 4267914 |
Anti-kickback power tool control |
May. 19, 1981 |
| 4162639 |
Load indicating nut wrench |
Jul. 31, 1979 |
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