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. 24, 2026
Filed:
Aug. 08, 2022
Mann+hummel Gmbh, Ludwigsburg, DE;
Daniel Schmid, Sachsenheim, DE;
Matthias Krohlow, Herrenberg, DE;
Martin Sonntag, Freiberg, DE;
Steffen Pfannkuch, Ludwigsburg, DE;
Martin Schmid, Reisbach, DE;
Christoph Wittmers, Bietigheim-Bissingen, DE;
Robert Hasenfratz, Schwäbisch Hall, DE;
MANN+HUMMEL GmbH, Ludwigsburg, DE;
Abstract
A filter element has a filter medium annularly surrounding a longitudinal axis of the filter element. The filter medium can be flowed through radially from an exterior to an interior and has a plurality of folds. A first end disk is arranged at a first end face of the filter element. A primary air passage and a secondary air passage are provided. The filter medium has an axial recess at the first end face. The first end disk has a channel forming the secondary air passage and extending in the axial recess. The plurality of folds include first folds in a region of the recess and second folds away from the recess. An axial length of the first folds is reduced relative to an axial length of the second folds. An air filter with such filter element and an assembly method for the air filter are provided.