AUTOMOTIVE FUEL SYSTEM HAVING ELASTOMERIC SEALS INCORPORATING GRAPHENE
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United States of America Patent
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Issued Date -
Nov 16, 2023
app pub date -
May 9, 2023
filing date -
May 9, 2023
priority date (Note) -
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Abstract
A capless fuel unit having an elongated tubular and cylindrical housing open at each end, the housing defining a first and a second longitudinally spaced fluid ports. A first flapper valve is associated with the first fluid port and a second flapper valve with the second fluid port, the flapper valves being movable between open and closed positions and resiliently urged toward their respective closed positions. A pressure relief valve is at least partially contained within an interior of the flapper valves. An arrangement of elastomeric seals incorporating a Graphene-derivative are positioned within the housing in proximity with the flapper valves for resisting hydrocarbon emission from fuel vapors escaping from the unit to the atmosphere.
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