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:
Jan. 21, 2003
Filed:
Feb. 05, 2001
Applicant:
Inventors:
Heinz Mueller, Remseck, DE;
Helmut Storz, Benningen, DE;
Assignee:
Filterwerk Mann & Hummel GmbH, Ludwigsburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 3/5147 ;
U.S. Cl.
CPC ...
B01D 3/5147 ;
Abstract
A filter, especially a filter for lubricating oil of an internal combustion engine, including an inlet for the raw liquid and an outlet for the clean liquid. A filter insert ( ) is arranged inside the filter, as well as a valve, such as a pressure relief valve ( ). Parts of the valve are provided with coatings, for example hydrophobic coatings of polytetrafluoroethylene or silicone. The filter can also contain a heating element ( ) in the vicinity of the valve.