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:
Apr. 30, 2013
Filed:
Jan. 30, 2008
Applicants:
Johannes Esser, Odenthal, DE;
Frank Münchow, Wermelskirchen, DE;
Inventors:
Johannes Esser, Odenthal, DE;
Frank Münchow, Wermelskirchen, DE;
Assignee:
Federal-Mogul Burscheid GmbH, Burscheid, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A piston ring, with a main body, which exhibits a contact surface, an upper and a lower side surface, and an inner circumferential surface, in which at least one of the side surfaces is provided at least with one PVD coating layer, to the effect that the layer thickness of the PVD coating layer tapers radially from the outside inward.