Hydraulic torque impulse generator having a pressure responsive

Details Hydraulic torque impulse generator having a pressure responsive Hydraulic torque impulse generator having a pressure responsive

1996-11-08

1998-07-07

Walsh, Donald P.

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Fluid coupling

For transmitting limited pulsating torque

173 93, 173 935, F16D 380

Patent

active

057759995

ABSTRACT:
A hydraulic torque impulse generator having a drive member (10) with a fluid chamber (12) and an output spindle (11) extending into the fluid chamber (12) and being provided with a movable seal element (19) and an axial seal ridge (22) for cooperation with oppositely disposed axial seal lands (13, 14) in the fluid chamber (12) to, thereby, divide the fluid chamber (12) into one high pressure compartment (H.P.) and one low pressure compartment (L.P.) during a limited angular interval of relative rotation between the drive member (10) and the output spindle (11), and a valve means comprising an elongate contact element (24, 44) which is supported in an axial groove (23, 43) in the seal ridge (22 ), which groove (23, 43) communicates with the high pressure compartment (H.P.) such that the contact element (24, 44) is urged into its sealing condition by the fluid pressure at pressure magnitudes above a certain level. A sealing barrier (27) around the output spindle (11) comprises a clearance seal (33), a low pressure chamber (39) and a spring biassed piston (35) and prevents temperature related pressure variations in the fluid chamber (12).

REFERENCES:
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patent: 3283537 (1966-11-01), Gillis
patent: 3292391 (1966-12-01), Kramer
patent: 3304746 (1967-02-01), Kramer et al.
patent: 4175408 (1979-11-01), Kasai et al.
patent: 4683961 (1987-08-01), Schoeps
patent: 4735595 (1988-04-01), Schoeps
patent: 4789373 (1988-12-01), Adman
patent: 4967852 (1990-11-01), Tatsuno
patent: 5217079 (1993-06-01), Kettner et al.

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