Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Patent
1982-06-08
1984-07-24
Walton, George L.
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
91420, 137493, 137495, 1375962, 244 78, 251 635, F16K 31122
Patent
active
044614497
ABSTRACT:
A hydraulic blocking valve for use in an aircraft flight power actuator employs a unique stepped piston design referenced to return pressure which provides pressure relief at a fixed value independent of system pressure.
REFERENCES:
patent: 2653626 (1953-09-01), Finlayson
patent: 2778378 (1957-01-01), Presnell
patent: 3792715 (1974-02-01), Parrett et al.
patent: 3857404 (1974-12-01), Johnson
patent: 3942550 (1976-03-01), Orme
patent: 3943968 (1976-03-01), Treichler
patent: 4089344 (1978-05-01), Flaschar et al.
The Boeing Company
Walton George L.
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