Vacuum closed venting valve
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United States of America Patent
Stats
-
Jan 4, 1983
Grant Date -
N/A
app pub date -
Nov 24, 1980
filing date -
Nov 22, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A venting valve comprising a body having first and second ports. A movable valve member having a venting passage is located in the body and is biassed to a first position where the venting passage provides communication between the first and second ports. A chamber is located within said body and a third port opens into the chamber. The construction and arrangement is such that the introduction of sub-atmospheric pressure into the chamber via the third port causes the valve member to move to a second position where the first port is isolated from the second port but is opened to the third port via the chamber.
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Family
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Cited Art Landscape
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