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:
Mar. 17, 2009
Filed:
Jun. 30, 2005
Uwe Haefner, Weinheim, DE;
Roland Dobner, Wald-Michelbach, DE;
Peter Capuani, Wald-Michelbach, DE;
Volker Braeunling, Heppenheim, DE;
Uwe Haefner, Weinheim, DE;
Roland Dobner, Wald-Michelbach, DE;
Peter Capuani, Wald-Michelbach, DE;
Volker Braeunling, Heppenheim, DE;
Carl Freudenberg KG, Weinheim, DE;
Abstract
A filter element includes a filter web pleated in an essentially zigzag manner and made, in particular, of a nonwoven material, for insertion into a holder such as a filter frame and/or a filter housing, having at least one end-positioned wall of an essentially flat design. The filter element includes at least one end face, viewed in the direction of the pleats. To achieve a tighter seal, the end face of the filter element is curved outward in a defined convex manner, and the filter web material is selected and/or its end face conditioned so that, when inserted into the holder, the end face of the filter web may be placed leak-tight against the end wall of the holder without corrugation under elastic pre-tension.