Servo valve control device

Details Servo valve control device Servo valve control device

1985-04-18

1985-12-31

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

91363A, 13762564, 251261, F15B 13043, F15B 907, F15B 2000

Patent

active

045614709

ABSTRACT:
A control system for a fluid actuated control member is disclosed which uizes a pair of electrically controlled servo valves to control the supply of servo pressure fluid to a control valve piston. The pair of servo valves are electrically controlled such that, under normal conditions, one of the servo valves is operative to supply the servo pressure signal, while the other servo valve remains in an inert, open position. Upon the detection of a malfunction in the operative servo valve, electrical switches render the malfunctioning valve inert and transfer the operative capabilities to the second servo valve. The hydraulic control system does retain 100% of its performance capabilities following a malfunction of the initial servo valve.

REFERENCES:
patent: 3018794 (1962-01-01), Hoge
patent: 3257911 (1966-06-01), Garnjost et al.
patent: 3437312 (1969-04-01), Jenney
patent: 3494256 (1970-02-01), Bioletti
patent: 3732887 (1973-05-01), Hayner

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