Filter element

US7503954B2 · kind B2 · utility

Assignee

• Carl Freudenberg KG · DE

Inventors

• Uwe Haefner · Kehl, DE
• Roland Dobner · Wald-Michelbach, DE
• Peter Capuani · Wald-Michelbach, DE
• Volker Braeunling · Heppenheim, DE

Key dates

• Filing date: Jun 30, 2005
• Grant date: Mar 17, 2009
• Expiry date: Jun 1, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S55/31
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

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.