Valves and valve actuation – Fluid actuated or retarded – Compulsory cut-off after flow period
Patent
1977-06-30
1980-10-14
Cohan, Alan
Valves and valve actuation
Fluid actuated or retarded
Compulsory cut-off after flow period
251 36, 251 47, 251 54, 251 42, F16K 2106, F16K 31128
Patent
active
042276748
ABSTRACT:
A liquid metering flush valve to be installed in connection with plumbing fixtures such as water closets, urinals, service sinks, and other equipment and to supply said fixtures with a predetermined amount of water; which may be potable water, contaminated water, sea water, corrosive and/or unfiltered water, and water and/or oil combinations; at controlled pressures, flow rates and volumes. The basic valve design is on the hydraulic principal of proportional flow through orifices, regardless of pressure fluctuation but employs the use of four chambers, two of which are sealed and contain not only an orifice therebetween but a filtered, non-corrosive captive liquid to assure the orifice of protection from corrosive action and dirt which may damage the orifice or clog it and prevent it from working properly. One basic body design for either exposed or concealed valve installation simplify stocking and production requirements and costs and promote water economy through an adjustable feature which permits use of a minimum amount of water volume. The flexibility of selection of a Diaphragm model, Bellows model, or a Piston model best utilizes modern materials for maximum service when handling liquids other than clean, grit free, non-corrosive, potable water.
REFERENCES:
patent: 713138 (1902-11-01), Nethery
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patent: 1812301 (1931-06-01), Nasmyth
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patent: 3008683 (1961-11-01), Filliung et al.
Cohan Alan
Creighton Wray James
Walton G. L.
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