Fuel check valve assembly for fuel tank
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United States of America Patent
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-
Dec 22, 1992
Grant Date -
N/A
app pub date -
Nov 29, 1991
filing date -
Nov 30, 1990
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A fuel check valve assembly for an automotive vehicle fuel tank includes a valve casing having a valve seat and a float valve movably installed in the valve casing for controlling opening and closing of the valve seat. The float valve consists of a valve float and a valve head cooperative with each other to define therebetween a sealingly closed chamber. The valve head is subjected on opposite sides thereof to a pressure within the sealingly closed chamber and a pressure within the fuel tank, respectively and movable relative to the valve float in response to a pressure differential across the valve head. The valve head is forced to move relative to the valve float and away from the valve seat to open the same when the pressure differential across the valve head is larger than a predetermined value.
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