Poppet valve actuator apparatus

Details Poppet valve actuator apparatus Poppet valve actuator apparatus

1980-04-14

1982-01-05

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Flexible wall expansible chamber reciprocating valve actuator

251 634, 251 636, 251 73, 251 80, 251297, 74531, F16K 31126, F16K 31122

Patent

active

043090222

ABSTRACT:
A poppet valve actuating apparatus includes an actuator for driving a valve poppet closed with substantial but momentary force to effect tight valve shutoff. After driving the poppet closed with a momentarily-applied relatively high-value force, the actuator then automatically reduces the poppet seating or holding force for maintaining the value in the closed position by automatic release of an integral detent coupling that applies a lower-value auxiliary spring holding force after the poppet is seated. The reduced value holding force prevents cold flow of the poppet material during extended periods wherein the poppet is in a closed position.

REFERENCES:
patent: 2733729 (1956-02-01), Wolfe
patent: 3040772 (1962-06-01), Todd
patent: 3874629 (1975-04-01), Fontaine
patent: 4073466 (1978-02-01), Snyder
patent: 4074688 (1978-02-01), Snyder
patent: 4098487 (1978-07-01), Bauer
patent: 4248188 (1981-02-01), Wilson et al.

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