Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Mark T. Wieczorek0
Date of Patent
May 18, 2010
0Patent Application Number
114643840
Date Filed
August 14, 2006
0Patent Primary Examiner
Patent abstract
A fuel system of an engine is provided with a venting assembly to vent air that accumulates within a fuel filter of the fuel system and provides anti-drainback of clean fuel back toward the fuel filter when the engine is turned off. In one embodiment, the venting assembly includes a piston valve that provides both the vent and anti-drainback. The valve is actuatable by fluid pressure to a first position that restricts drainback, a second position that restricts venting, and intermediate positions between the first and second positions which permit venting.
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