Fluid filter element

Liquid purification or separation – Plural distinct separators – Filters

Reexamination Certificate

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Details

C210S450000, C210S456000, C210S493100, C210S446000, C184S006240

Reexamination Certificate

active

07635429

ABSTRACT:
A compact filter element with a large filter surface area having inner and outer rings of filter material with an annular space between them, such that fluid to be filtered can be introduced into the annular space between the rings of filter material and a portion thereof can flow through the outer ring of filter material to the periphery of the filter element and another portion thereof can flow through the inner ring of filter material to the center of the filter element; at least one fluid-permeable support member for the filter material, and at least one end disk on an axial end face of the filter element affixed to the rings of filter material in a sealed manner, in which the end disk has a centrally arranged inlet opening for the fluid to be filtered and one or more radially extending distributor channels leading from the central inlet opening to at least one eccentrically arranged outlet opening which opens into the annular space between the rings of filter material to admit fluid to be filtered to the annular space.

REFERENCES:
patent: 575478 (1897-01-01), Haefner
patent: 1840153 (1932-01-01), Bull
patent: 3361260 (1968-01-01), Buckman
patent: 3420377 (1969-01-01), Vandersip
patent: 4636315 (1987-01-01), Allen, Jr.
patent: 6171486 (2001-01-01), Green et al.
patent: 6361690 (2002-03-01), Bourgeois
patent: 6488842 (2002-12-01), Nagaoka
patent: 6565745 (2003-05-01), Hodgin et al.
patent: 6881330 (2005-04-01), Doyle et al.
patent: 2002/0195387 (2002-12-01), Donnerdal et al.
patent: 2003/0038093 (2003-02-01), Gershenson
patent: 2003/0178351 (2003-09-01), Doyle et al.
patent: 2005/0056582 (2005-03-01), Patel et al.
patent: 30 46 179 (1982-07-01), None
patent: 2 046 613 (1980-11-01), None
European Search Report dated Oct. 31, 2006 with an English translation of the pertinent portion (seven (7) pages).

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