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:
Feb. 06, 2018
Filed:
Feb. 17, 2012
Kouhei Sugimoto, Niigata, JP;
Yoshinari Watanabe, Niigata, JP;
Toshikatsu Hayashi, Niigata, JP;
Ryou Obara, Tokyo, JP;
Kouhei Sugimoto, Niigata, JP;
Yoshinari Watanabe, Niigata, JP;
Toshikatsu Hayashi, Niigata, JP;
Ryou Obara, Tokyo, JP;
KABUSHIKI KAISHA RIKEN, Tokyo, JP;
Abstract
Provided is a piston ring capable of maintaining an excellent effect of preventing aluminum cohesion in a high output engine over a long period of time. At least one of the upper, lower, and side faces of the piston ring is coated with a silica-based coating in which hard nanoparticles are dispersed. The coating has a Martens hardness of 1,000 to 8,000 N/mm. As the hard nanoparticles, carbon nanoparticles, nanodiamond particles, carbon nanotubes, or carbon nanofibers are used. To the coating, resin particles of a fluorine-based resin or a polyether-based resin may be added.