Variable force actuator

Details Variable force actuator Variable force actuator

1976-02-05

1977-09-27

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Fluid and non-fluid actuators

74110, 251 58, 251229, 251231, 251279, F16K 31115

Patent

active

040506703

ABSTRACT:
An actuator for reciprocating stem control valves having a linkage system affording variable force, reversible action, and adaptability to different valve strokes.

REFERENCES:
patent: 1295638 (1919-02-01), Triggs
patent: 2169126 (1939-08-01), Repka
patent: 2461034 (1949-02-01), Castle
patent: 2646074 (1953-07-01), Hopkins
patent: 2919885 (1960-01-01), Daigle
patent: 3000242 (1961-09-01), Barrett
patent: 3684237 (1972-08-01), Hyde et al.

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