Liquid purification or separation – Filter – Divided filtered – and unfiltered liquid passages
Reexamination Certificate
2011-06-14
2011-06-14
Smith, Duane (Department: 1776)
Liquid purification or separation
Filter
Divided filtered, and unfiltered liquid passages
C210S436000, C210S438000, C210S440000, C210S441000, C210S472000, C210S130000, C210S232000, C210S248000
Reexamination Certificate
active
07959010
ABSTRACT:
An apparatus, system, and method for bypassing a fuel filter pressure regulation valve which includes a bypass window and bypass passage. The bypass passage window is positioned in the top of a standpipe of a filter. The filter includes a filter cartridge with top and bottom end plates. The top end plate of the filter cartridge has a hole to receive a standpipe. The top end plate also has a sealing gasket to seal the bypass passage window when the proper filter cartridge is in place. This arrangement exposes the regulator valve to the fuel and/or air at the top of the filter housing when the proper filter cartridge is in place. Pressure in the housing opens the valve, allowing air and/or fuel to be vented through the bypass passage and back to the fuel tank.
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Machine Translation of DE19519352C2.
International Search Report of PCT/US2009/036955, dated Sep. 16, 2009.
Written Opinion of the International Searching Authority of PCT/US2009/036955, dated Sep. 16, 2009.
Hawkins Charles W.
Wieczorek Mark T.
Cummins Filtration IP Inc.
Durand Paul J
Hamre Schumann Mueller & Larson P.C.
Schelkopf J. Bruce
Smith Duane
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