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:
Dec. 23, 2025
Filed:
Sep. 28, 2022
Federal-mogul Burscheid Gmbh, Burscheid, DE;
Stefan Dürdoth, Burscheid, DE;
Anika Distelrath-Lübeck, Leverkusen, DE;
Federal-Mogul Burscheid GmbH, Burscheid, DE;
Abstract
A piston ring for internal combustion engines is provided, having a surface comprising a wear protection layer of iron or an iron alloy applied to the surface, wherein the wear protection layer has cracks and the cracks have an average density of 10-160 cracks per mm of the wear protection layer, wherein the iron or iron alloy have incorporated therein 0.2-15% by weight, based on the total weight of the wear protection layer, of carbon particles and 0.2-15% by weight, based on the total weight of the wear protection layer, of solid particles other than carbon particles. Furthermore, a method for manufacturing a piston ring is provided.