Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1978-12-21
1982-01-26
Cohan, Alan
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
137491, 137492, 251 611, F16K 31365
Patent
active
043123759
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 seat and that of the second outlet is greater than the open cross-section of the overpressure passage means.
REFERENCES:
patent: 2576516 (1951-11-01), Jurs
patent: 2672827 (1954-03-01), McGowen
patent: 3078066 (1963-02-01), Moore
patent: 3502297 (1970-03-01), Wardrup
patent: 3592224 (1971-07-01), Bois
Braunschweiger Flammenfilter Leinemann & Co.
Cohan Alan
Striker Michael J.
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