Servo valve

Details Servo valve Servo valve

1976-11-26

1978-08-15

Truluck, Dalton L.

Surgery

Truss

Pad

128274, 137494, 13750515, A61M 2700

Patent

active

041065107

ABSTRACT:
The servo valve disclosed herein is rendered essentially insensitive to changes in pressure across the valving element by providing spring biasing of the valving element which is controlled by a diaphragm exposed to the inlet and outlet pressures. In a particular embodiment, the diaphragm is spring biased and the spring rates for the diaphragm and the valve element are selected in such proportion that the change in biasing force on the valve element exactly compensates for any change in inlet pressure. Therefore, the valve remains closed for any inlet pressure, unless the bias on the spring rates is unbalanced by a signal coming from a sensor.

REFERENCES:
patent: 1935548 (1933-11-01), Eggleston et al.
patent: 3276470 (1966-10-01), Griffing
patent: 3586082 (1971-06-01), Muller
patent: 3886948 (1975-06-01), Hakim

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