Hydraulic torque impulse tool

Details Hydraulic torque impulse tool Hydraulic torque impulse tool

1985-12-17

1988-04-05

Stodola, Daniel P.

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

Fluid coupling

For transmitting limited pulsating torque

173 93, B25D 1502

Patent

active

047355956

ABSTRACT:
A hydraulic torque impulse tool, comprising an inertia drive member (10;110) which is rotated by a motor and which includes a fluid chamber (19;119), and a seal and torque transmitting mechanism (30;130) which is arranged to divide the fluid chamber (19;119) into two compartments (38, 39; 138, 139) during a short interval of the relative rotation between the drive member (10;110) and the output spindle (11;111). A leaf spring valve (72; 171, 172) is arranged to control the flow through a bypass passage (70;170) interconnecting the two fluid chamber compartments (38, 39; 138, 139). The leaf spring valve (72;171, 172) which by its shape is pretensioned toward open condition automatically occupies the open condition as the difference in pressure between the fluid chamber compartments is low and a closed condition as this difference exceeds a certain level.

REFERENCES:
patent: 3116617 (1964-01-01), Skoog
patent: 3203203 (1965-08-01), Ward
patent: 3214940 (1965-11-01), Kramer
patent: 3283537 (1966-11-01), Gillis
patent: 3292391 (1966-12-01), Kramer et al.
patent: 3321043 (1967-05-01), Vaughn
patent: 3661217 (1972-05-01), Maurer
patent: 4321973 (1982-03-01), Maurer
patent: 4533337 (1985-08-01), Schoeps

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