Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1977-01-21
1979-04-10
Cohan, Alan
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
137492, F16K 31128
Patent
active
041483367
ABSTRACT:
A pilot controlled membrane valve for ventilating containers or the like comprises a valve housing having a first valve seat between the inlet and outlet of the housing. First valve means, movable between a closed position engaging said first valve seat and an open position, include a first membrane extending transversely through the housing and defining with the latter to one side of the first valve seat a valve chamber, which is connected by an overpressure passage means to the inlet. The valve includes further a pilot valve having a second seat, second valve means including a second membrane and being movable between a closed position engaging the second valve seat and an open position, a second outlet, means biasing the second valve means to the closed position and chamber means under atmospheric pressure surrounding the biasing means, in which the cross-section of the second valve seart and that of the second outlet is greater than the open cross section of the overpressure passage means.
REFERENCES:
patent: 2333522 (1943-11-01), Clifton
patent: 2576516 (1951-11-01), Jurs
patent: 2672827 (1954-03-01), McGowen
patent: 2890714 (1959-06-01), Greenwood
patent: 2999509 (1961-09-01), Hankison
patent: 3465771 (1961-09-01), Tishler
Braunschweiger Flammenfilter Leinemann & Co.
Cohan Alan
Striker Michael J.
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