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:
Oct. 14, 2014
Filed:
Oct. 14, 2010
Christian Herbst-dederichs, Bornheim, DE;
Peter-klaus Esser, Kürten, DE;
Ralf Lammers, Wermelskirchen, DE;
Sebastian Bresinski, Langenfeld, DE;
Christian Herbst-Dederichs, Bornheim, DE;
Peter-Klaus Esser, Kürten, DE;
Ralf Lammers, Wermelskirchen, DE;
Sebastian Bresinski, Langenfeld, DE;
Federal-Mogul Burscheid GmbH, Burscheid, DE;
Abstract
A piston ring, in particular a compression piston ring, includes a running surface, upper and lower flank areas, an inner peripheral area and a joint. The wall thickness of the piston ring is uniform over its periphery and at least the running surface is provided with a PVD coating or a CVD layer in such a manner that the running surface layer has a lesser layer thickness in the peripheral area close to the joint than in the remaining peripheral area of the running surface.