Anti-backflow device for sillcocks

Details Anti-backflow device for sillcocks Anti-backflow device for sillcocks

1978-03-15

1980-07-15

Schwadron, Martin P.

Fluid handling

Systems

Flow path with serial valves and/or closures

13751615, F16K 1518

Patent

active

042123194

ABSTRACT:
An anti-backflow device for preventing fluids from flowing back into a water supply system. The device adapted for attaching to a connecting rod inside a sillcock tube of a standard antifreeze sillcock. The device held in an open position for allowing water to flow through the sillcock under normal operating conditions. The device automatically stopping the backflow of water in the sillcock should there be a loss of water pressure to the sillcock and preventing fluids such as insecticides, chemicals, or the like mixed with water from polluting the water system.

REFERENCES:
patent: 700569 (1902-05-01), Serrel
patent: 946684 (1910-01-01), Neighbors
patent: 1003819 (1911-09-01), Staples
patent: 1024642 (1912-04-01), Marlatt
patent: 1129072 (1915-02-01), Conn
patent: 1298935 (1919-04-01), Hanman
patent: 1850063 (1932-03-01), Pepper
patent: 2804086 (1957-08-01), Johnston
patent: 3078875 (1963-02-01), Farrell et al.
patent: 3485371 (1969-12-01), Costantini
patent: 4158366 (1979-06-01), Van Meter

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