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:
Feb. 19, 2013
Filed:
Aug. 06, 2008
Norbert Strassenberger, Adlkofen, DE;
Norbert Strassenberger, Adlkofen, DE;
Mann + Hummel GmbH, Ludwigsburg, DE;
Abstract
The invention relates to a combination filter arrangement () having a hollow cylindrical filter element () for filtering a first fluid medium, having a temperature compensation medium separated by means of cylindrical separating wall (), as a second fluid medium in an area between the separating wall () and an outer housing () of the combination filter arrangement (). The first fluid medium is made of a urea-water mixture, or comprises a urea-water additive having a higher freezing temperature than the first and the second fluid medium, and at least the separating wall () has an elasticity such that the volume expansion by freezing the urea-water additive can be absorbed.