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:
Mar. 24, 2015
Filed:
Jan. 15, 2013
Applicant:
Mahle International Gmbh, Stuttgart, DE;
Inventor:
John C. Lahrman, Muskegon, MI (US);
Assignee:
Mahle Industries Inc., Farmington Hills, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/26 (2006.01); F16J 9/20 (2006.01);
U.S. Cl.
CPC ...
F16J 9/26 (2013.01); F16J 9/20 (2013.01);
Abstract
A piston ring comprising upper face, a lower face, an inner perimeter wall, and an outer perimeter wall that extends around the piston ring from the upper face to the lower face, where the outer perimeter wall has upper corner region disposed adjacent the upper face, a lower corner region disposed adjacent the lower face, and a band of a nitrided conversion layer extending between the upper corner region and the lower corner region, and where a PVD nitride layer is disposed on the upper corner region and on the lower corner region.