Fluid handling – Systems – Sequentially progressive opening or closing of plural valves
Patent
1993-01-19
1994-06-14
Fox, John C.
Fluid handling
Systems
Sequentially progressive opening or closing of plural valves
1375992, F16K 132
Patent
active
053201400
ABSTRACT:
A fluid valve has a valve housing defining a corner and having a valve housing cover opposite that corner. That valve housing and cover enclose a valve chamber therein. A fluid inlet or outlet is in the valve housing cover. First and second valve seats for further fluid inlets or outlets are in first and second sides, respectively, of the corner in the valve chamber. A flapper is in that chamber for selectively closing the first valve seat and alternatively the second valve seat. A flapper actuator is in the corner of the valve housing. There may be an expansible valve closing member for each valve seat. Such expansible valve closing member may have an aperture paralleling that valve seat. A pilot valve may be at the expansible valve closing member for closing its aperture. Opening of the valve is initiated by moving the pilot valve away from the aperture in the expansible valve closing member, and such opening of the valve is completed by pulling the expansible valve closing member away from its valve seat.
REFERENCES:
patent: 2275132 (1942-03-01), Crosthwait
patent: 2345306 (1944-03-01), Van Der Werff
patent: 2839082 (1958-06-01), Moore et al.
patent: 2889990 (1954-06-01), Loveland et al.
patent: 3888280 (1975-06-01), Tartaglia
patent: 4304264 (1981-12-01), McClintock et al.
patent: 4308894 (1982-01-01), Carpentier
Fox John C.
Teledyne Industries Inc.
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