Fluid control system for two independent actuators

Details Fluid control system for two independent actuators Fluid control system for two independent actuators

1981-12-24

1985-01-08

Green, Randall L.

Fluid handling

Systems

Supply and exhaust

13759618, 192 8714, 192 4C, 192 357, F16K 1104

Patent

active

044922515

ABSTRACT:
A fluid control system (10) for two independent actuators or clutches (11,12) has a pair of normally open solenoid valves (44,46) for controlling fluid pressure in a pair of actuating chambers (31,32). This controls actuation of a pair of directional spools (26,27) which in turn controls engagement and disengagement of the clutches (11,12) such that failure of one of the solenoid valves to close properly would not cause unexpected engagement of the associated clutch. A shuttle spool (59) is movable in response to pressurization of one of the actuating chambers (31,32) to a position for venting the other actuating chamber (31,32) thereby preventing simultaneous engagement of both clutches.

REFERENCES:
patent: 2952246 (1960-09-01), Collins
patent: 3199647 (1965-08-01), Staab
patent: 3294120 (1966-11-01), Ruchser
patent: 3757822 (1973-09-01), Kell
patent: 3910389 (1975-10-01), Pleier
patent: 3918488 (1975-11-01), Minami

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