Vent check valve
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United States of America Patent
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May 25, 1993
Grant Date -
N/A
app pub date -
Aug 28, 1992
filing date -
Aug 28, 1992
priority date (Note) -
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status (Latency Note)
Importance
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.
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