Hydraulic torque impulse tool

Details Hydraulic torque impulse tool Hydraulic torque impulse tool

1983-09-19

1985-08-06

Marcus, Stephen

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

Fluid coupling

For transmitting limited pulsating torque

173 93, B25D 1502

Patent

active

045333378

ABSTRACT:
In a hydraulic torque impulse tool having a power rotated inertia drive member (10; 110) and a hydraulic fluid chamber (19; 119) a piston (30; 130) is supported in the fluid chamber (19; 119) for reciprocating movement in a plane transverse to the rotation axis of the drive member (10; 110). The piston (30; 130) and the output spindle (11; 111) are provided with cam means (42, 43, 44; 142, 143, 144) by which the piston (30, 130) is reciprocated in the fluid chamber (19; 119) at relative rotation of the drive member (10; 110) and the output spindle (11; 111) of the tool. The piston (30; 130) and the fluid chamber (19; 119) have seal means (31, 28; 131, 128) by which one fluid chamber compartment (38; 138) is sealed off from another (39; 139) during a certain portion of each piston stroke, thereby accomplishing an instantaneous pressure build-up in one of the fluid chamber compartments. The resulting reaction impulse on the piston ( 30; 130) is transferred to the output spindle (11; 111) via said cam means (42, 43, 44; 142, 143, 144). An adjustable bypass valve (50; 150) is arranged to limit the peak pressure in the fluid chamber (19; 119) as well as the torque impulse magnitude delivered by the tool.

REFERENCES:
patent: 3072232 (1963-01-01), Martin et al.
patent: 3116617 (1964-01-01), Skoog
patent: 3221515 (1965-12-01), Brown
patent: 3263426 (1966-08-01), Skoog
patent: 3321043 (1967-05-01), Vaughn
patent: 3561543 (1971-02-01), Ulbing

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