VALVE DEVICE FOR FUEL VAPOR SYSTEM
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United States of America Patent
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Issued Date -
Jun 16, 2016
app pub date -
Dec 10, 2015
filing date -
Dec 15, 2014
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Abstract
A valve device for a fuel vapor system includes: a case having a valve seat; and an umbrella valve having a valve portion that provides a valve closed state by contacting the valve seat and provides a valve open state by separating from the valve seat, and an outer edge portion that is formed on a radially outer side of the valve portion and restrained by the case. The valve portion is elastically deformed so as to be convex by a predetermined amount in one direction in an axial direction in the valve closed state; and the valve portion is elastically deformed so as to be convex by greater than the predetermined amount in the one direction in the valve open state.
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