Fuel tank vent valve
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United States of America Patent
Stats
-
Nov 19, 2002
Grant Date -
Oct 24, 2002
app pub date -
Apr 23, 2001
filing date -
Apr 23, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pressure and vacuum vent valve for a vehicle fuel tank is provided including a structure defining a passageway and having a vent valve assembly positioned therein. The assembly includes a pressure relief valve to relieve pressure from the fuel tank when the pressure exceeds a predetermined level and a vacuum relief valve to relieve a vacuum in the tank when the pressure in the tank drops below a predetermined level. The vacuum relief valve presents a lubricious sealing surface that engages a valve seat. The pressure valve engages a sealing surface to close a central venting orifice provided in the vacuum valve.
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