Fluid handling – Systems – Supply and exhaust
Patent
1978-10-02
1980-08-05
Michalsky, Gerald A.
Fluid handling
Systems
Supply and exhaust
91451, 91516, 13759613, F15B 1308
Patent
active
042157200
ABSTRACT:
Fluid control valve apparatus is provided having a directional control valve for metering passage of fluid from a supply passage to a feeder passage for first actuator. A pressure compensating valve is provided for regulating flow through the directional control valve and for delivering excess fluid to a compensating valve output port for power operation of a second actuator. A main relief valve is connected to the first actuator feeder passage downstream from a metering portion of the directional control valve for sensing a first actuator stall condition. The main relief valve, when actuated, delivers fluid to a tank from a supply passage, through the metering portion of the directional control valve, and a relief passage including the main relief valve upon sensing an overload condition. The rate of flow through the relief passage is subject to limitation only by the metering portion of the direction control valve.
REFERENCES:
patent: 3722543 (1973-03-01), Tennis
patent: 3782404 (1974-01-01), Hodgson
patent: 3807447 (1974-04-01), Masuda
patent: 3911942 (1975-10-01), Becker
patent: 3926210 (1975-12-01), Rasmussen
patent: 3934742 (1976-01-01), Tennis
patent: 4003202 (1977-01-01), Becker
patent: 4043419 (1977-08-01), Larson
FitzGerald Thomas R.
General Signal Corporation
Mednick Jeffrey S.
Michalsky Gerald A.
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