Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1999-03-17
2000-07-18
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
137423, 137448, 210123, 210134, 21032172, 251 65, F16K 3124, F16K 3300
Patent
active
060892587
ABSTRACT:
An improved float valve assembly is provided for regulating water inflow to a purification module of a water purification system, such as a reverse osmosis purification module or the like. The float valve assembly is mounted within a reservoir for receiving and storing relatively purified water produced by the purification module, and includes a valve unit defining a vertically extending flow path from a tap water source to the purification module. A primary float carried on a float arm responds to rising and falling water level within the reservoir for respectively closing and opening a primary banjo valve mounted along the flow path. An over-center switch provides snap-action closure of the primary valve in response to rising water level, and the primary float is mounted on the float arm for a limited range of lost motion to accommodate this snap-action valve closure. A secondary banjo valve is mounted along the flow path at a location above the primary valve, and, in the event of primary valve malfunction, is closed by a secondary float carried on a float arm and responsive to rising reservoir water level. In a preferred form, the secondary valve remains closed upon subsequent descent of the water level, and is manually re-opened by depression of a reset button.
REFERENCES:
patent: 1316843 (1919-09-01), Lytton
patent: 1528842 (1925-03-01), O'Harrow
patent: 1894367 (1933-01-01), Corcoran
patent: 4436109 (1984-03-01), Taylor
patent: 4577657 (1986-03-01), Alexander
patent: 4776952 (1988-10-01), Burrows
patent: 5045197 (1991-09-01), Burrows
Busick Louis M.
Gerig Galen L.
Oasis Corporation
Walton George L.
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