Replaceable liquid filter

Details Replaceable liquid filter Replaceable liquid filter

2005-12-15

2009-06-30

Cecil, Terry K (Department: 1797)

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Check valve

C210S234000, C210S440000, C210SDIG017

Reexamination Certificate

active

07553409

ABSTRACT:
A replaceable liquid filter, particularly for the lubricating oil of an internal combustion engine, including a substantially cup-shaped housing with a concentrically arranged outlet opening for filtered liquid and at least one inlet opening for the liquid to be filtered, and a filter element disposed in a sealing manner in the housing between the inlet opening and the outlet opening. The housing is connected to a top plate, and the top plate is connected to an end plate. The top plate encloses a displacement space which is disposed in an inlet chamber in the mating part, such that the inlet opening in the top plate is disposed in the region of the displacement space and/or a backflow check valve is disposed in the area of the outlet opening such that the backflow check valve is positioned axially outside the effective filter element surface.

REFERENCES:
patent: 3000506 (1961-09-01), Hultgren
patent: 4052307 (1977-10-01), Humbert, Jr.
patent: 5236064 (1993-08-01), Wagoner
patent: 5362390 (1994-11-01), Widenhoefer et al.
patent: 5766451 (1998-06-01), Sparling
patent: 6068763 (2000-05-01), Goddard
patent: 0 362 554 (1988-09-01), None
patent: 2 208 068 (1989-02-01), None
European Search Report dated Feb. 17, 2006 (Six (6) pages) including English Translation of relevant portion.

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