Vent check valve

Details Vent check valve Vent check valve

1992-08-28

1993-05-25

Gluck, Richard E.

Gas: heating and illuminating

Distribution

Leakage

137202, 417401, C10J 128, F04B 2102

Patent

active

052135861

ABSTRACT:
A vent check valve for use with a fluid pump such as a chemical pump wherein the vent check valve includes a floatation chamber and floatation member therein such that air is allowed to flow therethrough during normal operation of the pump while the liquid is prevented from flowing therethrough in the event of a malfunction of the pump. The vent check valve also includes a porous member thereon which allows air to flow therethrough while preventing direct access into and contamination of the vent check valve.

REFERENCES:
patent: 2166370 (1938-07-01), Putnam et al.
patent: 2175526 (1938-10-01), Hutchison et al.
patent: 2677939 (1954-05-01), Clute
patent: 2780071 (1957-02-01), Calva
patent: 2935990 (1960-05-01), Biddle
patent: 3112189 (1963-11-01), Elliott
patent: 3169839 (1965-02-01), Calva
patent: 4007755 (1977-02-01), Lerner et al.
patent: 4025315 (1977-05-01), Mazelli
patent: 4504281 (1985-03-01), Williams, Jr. et al.
patent: 4611294 (1986-09-01), Stanfill
Advertising Brochure, "Nomad Chemical Metering Pump", Welker Engineering Company, Sep. 1988.
Advertising Brochure, "Porex Pneumatic Mufflers", Porex Technologies Corp., Circa 1984.
Advertising Brochure, "Sintercon", Advance Filtration Limited.

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