Servovalve with integrated failure monitoring

Details Servovalve with integrated failure monitoring Servovalve with integrated failure monitoring

1984-05-08

1986-03-18

Michalsky, Gerald A.

Fluid handling

Systems

Supply and exhaust

91438, 91446, 91448, 91459, 13762564, F15B 13043, F15B 2000

Patent

active

045761981

ABSTRACT:
An electrohydraulic servovalve which includes as an integral part thereof a monitor valve which senses the absence or lack of system pressure in the first or second stages of the valve and translates in the absence thereof to deactivate load control. The torque motor of the electrohydraulic servovalve is biased, electrically or magnetically, to provide a failure indication in the first stage of the valve in the absence of or excess of applied electrical signals to the torque motor.

REFERENCES:
patent: 2886009 (1959-05-01), Myers
patent: 2995014 (1961-08-01), Horky et al.
patent: 3265089 (1966-08-01), Nill
patent: 3552433 (1971-01-01), Mason
patent: 3683749 (1972-08-01), Bayles
patent: 4054154 (1977-10-01), Mason

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