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:
Aug. 16, 2022
Filed:
Feb. 02, 2021
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, Schwaebisch Hall, DE;
MANN+HUMMEL GmbH, Ludwigsburg, DE;
Abstract
A filter element has a filter medium folded in a star shape that surrounds annularly a longitudinal axis of the filter element and is flowed through radially from exterior to interior. The filter element has a primary air passage and a secondary air passage. In the filter medium, a cutout is formed that penetrates a plurality of folds of the filter medium. A passage socket at which the secondary air passage is formed extends through the cutout. An air filter provided with a filter housing having a raw air inlet, a primary air outlet, and a secondary air outlet, has such a filter element that separates in the filter housing a raw side communicating with the raw air inlet from a clean side. The primary air outlet communicates through the primary air passage and the secondary air outlet through the secondary air passage with the clean side, respectively.