Fluid handling – Self-proportioning or correlating systems – Self-proportioning flow systems
Patent
1975-08-20
1977-05-03
Cohan, Alan
Fluid handling
Self-proportioning or correlating systems
Self-proportioning flow systems
137269, 141 46, 141 59, 251282, F16K 1700
Patent
active
040208613
ABSTRACT:
A flow control valve particularly useful for a vapor recovery system of a gasoline station. Gasoline and gasoline vapor flow through separate passages in the valve. A restriction (venturi) is provided in the gasoline passage so that a pressure differential will be produced in the passage as a function of the rate of flow of gasoline passing therethrough. A first diaphragm carrying a valve element which controls the flow of fluid through the vapor passage is responsive to said pressure differential so that the flow rate of vapor passing through the valve will be proportional to the flow rate of gasoline. In each of two alternative embodiments, another diaphragm responsive to gasoline pressure is ganged to the valve to compensate for gasoline pressure variations. In a further embodiment, the vapor control valve operates in an "on-off" mode so that a maximum vapor "draw back" is effected whenever gasoline flow of any magnitude is extant.
REFERENCES:
patent: 1363513 (1920-12-01), Keith
patent: 2382625 (1945-08-01), Garretson
patent: 2641105 (1953-06-01), Drake
patent: 2705046 (1955-03-01), Schroeder
patent: 3047003 (1962-07-01), Gurney
patent: 3207422 (1965-09-01), Best
patent: 3256740 (1966-06-01), Tate et al.
patent: 3493005 (1970-02-01), Kakegawa
patent: 3667494 (1972-06-01), Haase
patent: 3815327 (1974-06-01), Viland
patent: 3850208 (1974-11-01), Hamilton
Cohan Alan
International Telephone and Telegraph Corporation
Michalsky Gerald A.
Stolzy A. Donald
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