Anti-syphon device for a water supply line

Fluid handling – Systems – Tank with internally extending flow guide – pipe or conduit

Patent

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Details

137539, 4196, F16K 1504, E03D 1100

Patent

active

040033996

ABSTRACT:
An anti-syphon device for a water supply line of a toilet tank having an opening in a bottom wall thereof. A tubular inlet fitting is mounted in the opening and has a lower portion extending downwardly from the bottom wall. The water supply line underlies the inlet fitting and includes a main portion, a head portion of enlarged diameter, and an outwardly extending flange at an upper end of the head portion. A washer forms a seal between the flange of the water supply line and the lower portion of the inlet fitting. The washer includes a portion extending inwardly of the head portion. There is a valve seat at the lower end of the head portion and a valve member, which is inside the head portion, engages the valve seat to form a seal therewith. A compression spring bears on the valve member and on the inwardly extending portion of the washer member to urge the valve member to closed position.

REFERENCES:
patent: 1764186 (1930-06-01), Teesdale
patent: 1901633 (1933-03-01), Glemmons
patent: 2737199 (1956-03-01), Ingram
patent: 3059667 (1962-10-01), Coceano
patent: 3171424 (1965-03-01), Shames et al.
patent: 3542155 (1970-11-01), Kern et al.

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