Fuel filter with keys

Liquid purification or separation – Filter – Supported – shaped or superimposed formed mediums

Reexamination Certificate

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Details

C210S234000, C210S430000, C210S493200

Reexamination Certificate

active

07070692

ABSTRACT:
A filter element removably located in a housing having a central valve structure. The element has an end cap with a valve actuating portion. The valve actuating portion includes a cylindrical portion and an annular base projecting radially inward from the cylindrical portion. The valve actuating portion includes a plurality of thin, flat keys spaced around the annular base and projecting radially inward from the cylindrical portion and axially outward from the base. The keys engage the valve structure in the housing when the element is installed, and open up a flow passage through the housing.

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patent: 6139738 (2000-10-01), Maxwell
patent: 6189513 (2001-02-01), Brown et al.
patent: 6495042 (2002-12-01), Knight
patent: 6797168 (2004-09-01), Knight
patent: 824484 (1969-10-01), None
patent: WO 95/13468 (1995-05-01), None

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