Antisiphon check valve

Details Antisiphon check valve Antisiphon check valve

1976-10-12

1978-03-28

Cohan, Alan

Fluid handling

Back flow prevention by vacuum breaking

Air vent in liquid flow line

F16K 1514

Patent

active

040809811

ABSTRACT:
A single diaphragm type of antisiphon check valve assembly is formed of a valve seat and a retainer plug mounted in a valve body to define a valve chamber in which is mounted the single flexible valve diaphragm. The valve chamber is adapted to communicate with an inlet port at one end of the valve body, with an outlet port formed in the retainer plug at the other end of the valve body and also with an air port formed in the same end of the body as the inlet port. The retainer plug and valve seat are constructed to cooperate with the valve body so as to provide a flow reversing relief conduit interconnecting the valve chamber with the air port, all in a simplified snap together valve assembly.

REFERENCES:
patent: 2233200 (1941-02-01), Dreyer
patent: 3670760 (1972-06-01), Butcher et al.
patent: 3951164 (1976-04-01), Crist

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