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Class Information
Number: 464/25
Name: Rotary shafts, gudgeons, housings, and flexible couplings for rotary shafts > Fluid coupling > For transmitting limited pulsating torque (e.g., fluid drive coupling for impulse tool)
Description: Subject matter including structure for applying torque in cyclical pulses from an input member to a relatively rotatable output member through the medium of said liquid or gas, and wherein means is provided to limit the maximum torque applied during each pulse.

Patents under this class:

Patent Number Title Of Patent Date Issued
8333143 Hydraulic cylinder device Dec. 18, 2012
7801657 Stability-enhanced traction and yaw control using electronically controlled limited-slip differential Sep. 21, 2010
6599197 Impulse torque generator for a hydraulic power wrench Jul. 29, 2003
6110045 Hydraulic torque impulse generator Aug. 29, 2000
5775999 Hydraulic torque impulse generator having a pressure responsive bypass flow valve Jul. 7, 1998
5741186 Impulse torque generator for a hydraulic power wrench Apr. 21, 1998
5645130 Hydraulic torque impulse mechanism Jul. 8, 1997
5429553 Hydraulic torque impulse generator Jul. 4, 1995
5147245 Hydraulic torque impulse generator Sep. 15, 1992
5092410 Adjustable pressure dual piston impulse clutch Mar. 3, 1992
5080181 Pressure detecting device for torque control wrench Jan. 14, 1992
4967852 Oil pressure type impulse torque generator for wrench Nov. 6, 1990
4884995 Hydraulic torque impulse generator Dec. 5, 1989
4854916 Hydraulic torque impulse generator with bypass mechanism Aug. 8, 1989
4836296 Fluid pressure impulse nut runner Jun. 6, 1989
4789373 Hydraulic torque impulse generator Dec. 6, 1988
4785693 Hydraulic torque wrench Nov. 22, 1988
4766787 Two-blade type impulse wrench Aug. 30, 1988
4767379 Hydraulic torque impulse generator Aug. 30, 1988
4761151 Hydraulic torque impulse generator Aug. 2, 1988
4735595 Hydraulic torque impulse tool Apr. 5, 1988
4683961 Hydraulic torque impulse motor Aug. 4, 1987
4666379 Co-rotor engine and drive apparatus May. 19, 1987
4553948 Oil pressure type pneumatic torque wrench Nov. 19, 1985
4533337 Hydraulic torque impulse tool Aug. 6, 1985
4175408 Apparatus for absorbing oil pressure in an impact type tool Nov. 27, 1979

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