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. 22, 2024
Filed:
Sep. 29, 2021
Applicant:
Mahle International Gmbh, Stuttgart, DE;
Inventors:
Jose Valentim Lima Sarabanda, São Paulo, BR;
Fabio Mendes de Araujo, Waterford, MI (US);
Assignee:
Mahle International GmbH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/26 (2006.01); C23C 14/02 (2006.01); C23C 14/06 (2006.01);
U.S. Cl.
CPC ...
F16J 9/26 (2013.01); C23C 14/024 (2013.01); C23C 14/0641 (2013.01);
Abstract
A piston ring includes a split annular body having an outer circumferential surface, an intermediate coating on the outer circumferential surface, a first layer on the intermediate coating, the first layer having a first hardness and a first porosity, and a second layer on the first layer, the second layer having a second hardness that is less than the first hardness, and having a second porosity that is greater than the first porosity.