Actuator control device with meter-out valve

Details Actuator control device with meter-out valve Actuator control device with meter-out valve

1994-11-15

1995-07-18

Ryznic, John E.

Power plants

Pressure fluid source and motor

Condition responsive control of motive fluid flow

60466, F16K 332, F16D 3102

Patent

active

054330777

ABSTRACT:
A control valve feeds pressurized fluid for moving an actuator in first and second directions. A meter-out valve controls return flow of pressurized fluid from the actuator during actuation in the second direction. The meter-out valve is controlled by a pilot pressure controller independently of the actuator in response both to pilot pressures and to engine speed. The meter-out valve includes both a restricted channel and an unrestricted channel. The restricted channel, and the unrestricted channel are selectively connected dependent on the pilot pressures and the engine speed to supply sufficient fluid flow to permit stable operation of the actuator.

REFERENCES:
patent: 3125324 (1964-03-01), Vivier
patent: 3175354 (1965-03-01), Firth et al.
patent: 3872671 (1975-03-01), Verlinde
patent: 4644849 (1987-02-01), Tanaka

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