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:
Sep. 20, 2016
Filed:
Dec. 06, 2013
Applicant:
Kabushiki Kaisha Riken, Tokyo, JP;
Inventors:
Assignee:
KABUSHIKI KAISHA RIKEN, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 9/26 (2006.01); F02F 5/00 (2006.01); C23C 14/06 (2006.01); C23C 14/32 (2006.01); C23C 28/04 (2006.01); C23C 28/00 (2006.01);
U.S. Cl.
CPC ...
F16J 9/26 (2013.01); C23C 14/0641 (2013.01); C23C 14/325 (2013.01); C23C 28/042 (2013.01); C23C 28/044 (2013.01); C23C 28/42 (2013.01); F02F 5/00 (2013.01);
Abstract
To provide a piston ring having a hard laminate coating for excellent scuffing resistance, wear resistance and peeling resistance, which can be used in an environment of high mechanical and thermal load in engines, the piston ring is provided with a hard laminate coating as thick as 10-60 μm on its outer peripheral surface, the laminate coating being formed by alternately laminating two types or more of layers made of different compounds, each of the compound layers being made of nitride of at least one metal selected from the group consisting of Ti, Cr, Zr, V, Hf and Al.