Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1985-12-23
1987-03-03
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
F16K 3144, F16K 31126
Patent
active
046467793
ABSTRACT:
A fill valve for controlling liquid level in a toilet water tank or other tank includes a valve head assembly positioned at a selected level in the tank by a telescoping riser assembly with liquid inlet and outlet conduits extending toward the tank bottom. An adjusting nut on a stationary riser engages thread structures on inlet and outlet conduits for raising or lowering the valve head assembly and adjusting the liquid level. A main valve in the head assembly is controlled by a non-horizontal diaphragm separating a vent chamber and a control chamber. The control chamber is pressurized as liquid rises to the selected level by a standpipe extending downwardly in the tank. The valve closing and opening levels are offset by partly filling the vent chamber with liquid when the main valve is open to hydraulically load the diaphragm. A vacuum breaker valve obstructs backflow through the valve, vents the flow path when the valve is closed, and regulates flow into the vent chamber when the valve is open.
REFERENCES:
patent: 2827073 (1958-03-01), Owens
patent: 3797518 (1974-03-01), Holm et al.
patent: 3895645 (1975-07-01), Johnson
patent: 3930516 (1976-01-01), Flinner et al.
patent: 4065095 (1977-12-01), Johnson
patent: 4094327 (1978-06-01), Brandelli
patent: 4180096 (1979-12-01), Johnson
patent: 4182364 (1980-01-01), Gilbert et al.
Masco Corporation
Walton George L.
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