Fluid control valves

Details Fluid control valves Fluid control valves

1978-05-30

1980-07-01

Schwadron, Martin P.

Valves and valve actuation

Fluid actuated or retarded

Flexible wall expansible chamber reciprocating valve actuator

13759618, 137863, 92 49, 92 97, F16K 31126

Patent

active

042103100

ABSTRACT:
A sphincter valve for the control of fluid flow is characterized by a pair of diaphragms spaced apart from one another and having different effective areas. The smaller-area diaphragm is adapted for deflection into sealing engagement with a seating to control fluid flow thereacross, whereas the larger-area diaphragm is arranged to be exposed to operating (pilot or signal) fluid to be deflected thereby towards the smaller-area diaphragm. A thrust transmission element disposed between the diaphragms serves to deflect the smaller-area diaphragm in response to deflection of the larger-area diaphragm.

REFERENCES:
patent: 2376918 (1945-05-01), Hughes
patent: 2966927 (1961-01-01), Peters
patent: 3116918 (1964-01-01), Francis
patent: 3182684 (1965-05-01), Hutchison
patent: 3187640 (1965-06-01), Young et al.
patent: 3575190 (1971-04-01), Paster et al.
patent: 3653408 (1972-04-01), Coiner
patent: 3934611 (1976-01-01), Gachot et al.
patent: 3973533 (1976-08-01), Arano

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