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:
Jun. 29, 2021
Filed:
Jun. 02, 2017
Applicant:
Mahle International Gmbh, Stuttgart, DE;
Inventors:
Jose Valentim Lima Sarabanda, São Paulo, BR;
Fabio Mendes de Araujo, Waterford, MI (US);
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/26 (2006.01); C23C 14/06 (2006.01);
U.S. Cl.
CPC ...
F16J 9/26 (2013.01); C23C 14/0641 (2013.01);
Abstract
A piston ring and a method of manufacturing a piston ring for a piston of a reciprocating internal combustion engine. The piston ring comprises a body having an outer circumferential surface. A tribological coating is formed on the outer circumferential surface of the body. The tribological coating has a dual layer structure and includes a relatively hard base layer and a relatively porous top layer overlying the base layer.