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. 11, 2016
Filed:
Jan. 28, 2011
Michihiro Ito, Saitama, JP;
Naoyuki Akimoto, Saitama, JP;
Iwao Hiraishi, Saitama, JP;
Makoto Kajiwara, Saitama, JP;
Atsushi Chiba, Saitama, JP;
Michihiro Ito, Saitama, JP;
Naoyuki Akimoto, Saitama, JP;
Iwao Hiraishi, Saitama, JP;
Makoto Kajiwara, Saitama, JP;
Atsushi Chiba, Saitama, JP;
NIPPON PISTON RING CO., LTD., Saitama, Saitama, JP;
Abstract
Provided is a piston ring such that it is possible to sufficiently inhibit adhesive wear when the piston ring is mounted to a piston for a diesel engine in which at least the piston ring groove in the piston is formed from steel or cast iron. Disclosed is a piston ring mounted to a piston for a diesel engine, wherein the load length ratio (Rmr2) (in accordance with JIS B0601:2001) of the top surface and bottom surface of the piston ring satisfies each of the following conditions: Rmr2 (0.5%, 0.3[mu]m)=20% and Rmr2 (0.5%, 0.4[mu]m)=40%.