Hydraulic pressure relief valve for lock-up clutch

Details Hydraulic pressure relief valve for lock-up clutch Hydraulic pressure relief valve for lock-up clutch

1981-10-13

1984-04-10

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

F16H 4502

Patent

active

044415958

ABSTRACT:
A pressure relief valve to control the opening of a port between two pressure vessels at a predetermined time to eliminate differential pressure between the vessels. More particularly, the lock-up clutch assembly in a torque converter is actuated due to a pressure differential on the opposite sides of the clutch or piston plate, and the pressure relief valve will open upon deceleration of the vehicle driven by the torque converter to equalize the pressure on the opposite sides of the clutch plate and allow disengagement of the clutch plate from the torque converter housing.

REFERENCES:
patent: 2574573 (1951-11-01), Libby
patent: 3734251 (1973-05-01), Annis et al.
patent: 3972397 (1976-08-01), Cheek
patent: 3977502 (1976-08-01), Chana
patent: 4091899 (1978-05-01), Stevenson
patent: 4167993 (1979-09-01), Vukovich et al.
patent: 4173270 (1979-11-01), Croswhite et al.
patent: 4181203 (1980-01-01), Malloy
patent: 4333552 (1982-06-01), LaMarche
patent: 4360090 (1982-11-01), Wonn
U.S. Patent Application Serial No. 153,130 Filed May 27, 1980.

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