Fluid handling – Liquid level responsive or maintaining systems – By weight of accumulated fluid
Patent
1989-06-28
1990-08-07
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
By weight of accumulated fluid
137414, 137426, F16K 3134, F16K 2120
Patent
active
049459449
ABSTRACT:
A fill valve for use with toilet tanks is configured to include an extensible pipe unit of an inlet and an outlet pipes for adjusting the water level and a telescopic air cylinder acting also for adjustment of the water level. A valve body is provided therein with a main valve including a diaphragm to be driven by the difference in pressure to open and close an inlet valve seat for water filling and an auxiliary valve of a further diaphragm to actuate and direct the opening and closing of the main valve by the air pressure so as to perform water filling and water stoppage of the tank. The arrangement allows the main valve to forcibly and effectively close an inlet valve port having a diameter of opening far greater than that of a conventional fill valve especially by way of difference in the water pressure whereby it greatly enhances the speed of water filling while reduces the filling time.
REFERENCES:
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patent: 2665706 (1954-01-01), Hansen
patent: 4065095 (1977-12-01), Johnson
patent: 4094327 (1978-06-01), Brandelli
patent: 4182364 (1980-01-01), Gilbert et al.
patent: 4292996 (1981-10-01), Pataki et al.
patent: 4340082 (1982-07-01), Straus
patent: 4574826 (1986-03-01), Johnson
patent: 4765363 (1988-08-01), Pi-Yu
patent: 4887635 (1989-12-01), Johnson
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