Automatic relief valve

Details Automatic relief valve Automatic relief valve

1991-05-30

1992-04-21

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

137523, 137526, 137846, F16K 1718

Patent

active

051058480

ABSTRACT:
A swimming pool cleaner relief valve comprising a body; a flow passage through the body having an inlet and an outlet for connection to a pipe having an induced flow therethrough; a bypass passage through the body connected to the flow passage and open to ambient conditions at a free end and having parallel ridges on its inner surface and a restriction at the free end; a flexible resilient diaphragm that slides coaxially within the bypass passage having a peripheral flange and a perforation permitting flow therethrough in only one direction and variable in size depending upon the degree of flexing of the diaphragm, and cooperating members movable in the parallel ridges to prevent complete withdrawal of the diaphragm from the bypass passage; and a collar having a ring with a recess that receives the flange and having serrated projections that engage the restriction.

REFERENCES:
patent: 1038685 (1912-09-01), Titus
patent: 2431457 (1947-11-01), Bondurant
patent: 3086542 (1963-04-01), Mosier
patent: 3941149 (1976-03-01), Mittleman
patent: 3976096 (1976-08-01), Kass et al.
patent: 4458711 (1984-07-01), Flider
patent: 4493339 (1985-02-01), Porter, Jr.

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