The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2009
Filed:
Dec. 15, 2005
Helmut Luka, Marbach, DE;
Markus Kolczyk, Mundelsheim, DE;
Dieter Schreckenberger, Marbach, DE;
Rainer Loos, Freiberg, DE;
Helmut Luka, Marbach, DE;
Markus Kolczyk, Mundelsheim, DE;
Dieter Schreckenberger, Marbach, DE;
Rainer Loos, Freiberg, DE;
Mann & Hummel GmbH, Ludwigsburg, DE;
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.