Patent · US Active

Filter element

US7442221B2 · kind B2 · utility

24Cited by

13References

8Claims

0Family size

Assignee

MANN+HUMMEL GmbH · DE

Inventors

Klaus-Dieter Ruhland · Meckenheim, DE
Edvard Kopec · Passau, DE

Key dates

Filing date	Jun 21, 2006
Grant date	Oct 28, 2008
Priority date	—
Expiry date	Dec 13, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S55/31
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter element, particularly a secondary element for a filter system in the intake tract of an internal combustion engine, which filter element includes a zig-zag pleated filter medium surrounded by a circumferential frame of polyurethane foam. The frame has a substantially oval contour and is insertable into an oval opening. To reproduce the oval contour, the plate-like medium has beveled lateral regions, such that a maximum effective filter surface is obtained with a minimum amount of waste. A circumferential groove or a circumferential web is provided in the frame to seal the polyurethane foam frame to the opening.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.