Tank vent control apparatus
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United States of America Patent
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-
Dec 21, 1999
Grant Date -
N/A
app pub date -
Jan 7, 1999
filing date -
Jan 7, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus is provided for controlling venting of vapor to and from a fuel tank. The apparatus includes a housing and first and second valves positioned in the housing. The first valve controls the primary flow of vapors from the fuel tank and includes an aperture permitting an auxiliary flow of vapor to and from the fuel tank. The second valve controls the auxiliary flow of vapor to the fuel tank and includes first and second apertures permitting vapor to flow to the fuel tank. The second valve moves between a first position permitting vapor to flow through the first aperture and a second position permitting vapor to flow through the first and second apertures at a greater flow rate.
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