Two stage automatic shut off valve
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United States of America Patent
Stats
-
Apr 30, 1991
Grant Date -
N/A
app pub date -
Jun 6, 1990
filing date -
Jun 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shut off valve assembly for preventing overfilling of an underground fuel storage tank or other storage tanks where the incoming flow is not metered, utilizes a two stage valve closure, the first stage closure signaling the tank is nearly filled to capacity and the second stage closure subsequently completely stopping flow into the tank.
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Family
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Cited Art Landscape
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