Tank refueling shutoff valve and vent system
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United States of America Patent
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-
Aug 24, 2004
Grant Date -
Sep 5, 2002
app pub date -
Mar 1, 2002
filing date -
Mar 2, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tank vent valve apparatus includes a valve housing formed to include an inlet port, an outlet port, and an interior region. The interior region is partitioned to define an intake chamber communicating with the inlet port, a discharge chamber communicating with the outlet port, and a float chamber containing a vent port valve and receiving liquid fuel and fuel vapor from the intake chamber. An interior wall defines a boundary between the float chamber and the discharge chamber and includes a valve seat formed to include a vent port therein. The vent port valve is buoyant and moves up and down along the interior wall as liquid fuel rises and falls in the float chamber to close and open the vent port.
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