Back flow prevention valve

Details Back flow prevention valve Back flow prevention valve

1982-01-21

1984-02-14

Walton, George L.

Fluid handling

Liquid level responsive or maintaining systems

By float controlled valve

137451, F16K 3118, F16K 3300

Patent

active

044310250

ABSTRACT:
There is disclosed a float-responsive valve of the type used in cisterns. Lost motion connection means are provided between the float and the valve, so that in the event of a drop of water pressure in the line supplying the valve, a resilient means overrides the action of the float to seat the valve and prevent siphoning of water from the system back into the water supply system. The construction is simple, using a minimal number of parts, and is easily maintained.

REFERENCES:
patent: 236311 (1881-01-01), Doherty
patent: 633180 (1899-09-01), Amodeo-Salvator
patent: 1047863 (1912-12-01), Wall
patent: 1212056 (1917-01-01), Hill
patent: 1338179 (1920-04-01), Hohmeister
patent: 1637444 (1927-08-01), Eustis
patent: 1639997 (1927-08-01), Haas
patent: 1657658 (1927-04-01), Buford
patent: 1709678 (1929-04-01), Miller
patent: 2324084 (1943-07-01), Horner
patent: 3153422 (1964-10-01), Marsee et al.
patent: 3363643 (1968-01-01), Skulski
patent: 3853141 (1974-12-01), Fischer
patent: 4122862 (1978-10-01), Brandelli
patent: 4243070 (1981-01-01), Jackson

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