Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1994-12-28
1995-08-08
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
F16K 3118
Patent
active
054390257
ABSTRACT:
A fill valve assembly for a toilet tank or the like includes a riser and a head portion that can be vertically adjusted without removal or disassembly of the valve in order to select a precise tank liquid level. Telescoping conduits in the riser are secured in adjusted position by a bayonet latch system including detents assisted by the force applied by pressurized liquid at the inlet to the assembly. A main valve disk is held against a valve seat by pressure in a control chamber in a standby position and is moved to an open position by venting of the control chamber. The valve includes an axial peripheral flange having an enlarged bead portion captured in an annular channel to provide an O-ring type seal against positive and negative pressure while maximizing flexibility of the disk. A lever for controlling a pilot seat for venting the chamber is pivoted between fulcrum flanges and is held by shoulders abutting one of the flanges. The lever is pivoted by a float in a float chamber. A weir and a float controlled valve prevent entry of water into the float chamber in a refill cycle until tank liquid level reaches the selected level to be maintained.
REFERENCES:
patent: 3797518 (1974-03-01), Holm et al.
patent: 4080986 (1978-03-01), Schoepe
patent: 4094327 (1978-06-01), Brandelli
patent: 4182364 (1980-01-01), Gilbert et al.
patent: 4286619 (1981-09-01), Straus
patent: 4600031 (1986-07-01), Nestich
patent: 4646779 (1987-03-01), Johnson
patent: 4765363 (1988-08-01), Pi-Yu
patent: 4945944 (1990-08-01), Chen
patent: 5035527 (1991-07-01), Antunez
patent: 5211204 (1993-05-01), Mikol
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