Electric fuel pump with universal relief valve installed in the pump inlet
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United States of America Patent
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-
Dec 14, 2004
Grant Date -
Oct 9, 2003
app pub date -
Dec 19, 2002
filing date -
Apr 8, 2002
priority date (Note) -
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Abstract
A universal relief valve assembly (30) installed in an electric fuel pump (10) for returning fuel from an outlet portion (16) of the fuel pump back to the inlet side of the pump. A cartridge (32) is mounted in the pump and has an opening (34) extending therethrough for fuel to flow from the outlet portion of the pump back to the inlet portion of the pump. A relief valve (42) installed in the cartridge is movable from a closed position to an open position by the pressure to which the relief valve is subjected. A valve spring (52) installed in the cartridge biases the relief valve closed. The cartridge is sized to fit into a variety of fuel pumps having a range of outlet pressures, so to reduce the number of relief valve assemblies required to manufacture a line of fuel pumps.
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