Hydraulic torque impulse generator

Details Hydraulic torque impulse generator Hydraulic torque impulse generator

1993-04-30

1995-07-04

Stodola, Daniel P.

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

Fluid coupling

For transmitting limited pulsating torque

B25B 2102

Patent

active

054295530

ABSTRACT:
A hydraulic torque impulse generator includes a motor driven drive member (10) with a fluid chamber (23), an output spindle (11) extending into the fluid chamber, two diametrically opposite seal elements (12, 13) movably supported in axial slots (32, 33) in the output spindle for sealing cooperation with seal lands (24, 25) on the fluid chamber wall, axially extending seal ribs (27-30) on both the fluid chamber wall and the output spindle, and a cam spindle (40) coupled to the drive member (10) and extending into a coaxial bore (34) in the output spindle for moving the seal elements outwardly towards the fluid chamber wall in two relative angular positions between the drive member and the output spindle. The cam spindle (40) has two diametrically opposite and differently shaped cams (41, 42) for alternative engagement with high and low lift cam followers (45-50) on the seal elements (12, 13). In one of the relative positions between the drive member and the output spindle, the seal elements are moved outwardly into sealing engagement with the seal lands, and in the other of the relative positions between the drive member and the output spindle, the seal elements are moved to positions where no sealing cooperation with the seal lands is obtained, thereby generating only a single torque impulse during each revolution of the drive member relative to the output spindle.

REFERENCES:
patent: 4767379 (1988-08-01), Schoeps
patent: 4785693 (1988-11-01), Minamivama et al.
patent: 4884995 (1989-12-01), Schoeps
patent: 4920836 (1990-05-01), Sigimoto et al.
patent: 5080180 (1992-01-01), Tatsuno

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