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:
Jul. 18, 2017
Filed:
Oct. 29, 2012
Applicant:
Kabushiki Kaisha Riken, Chiyoda-ku, Tokyo, JP;
Inventors:
Toshikatsu Hayashi, Kashiwazaki, JP;
Kouhei Sugimoto, Kashiwazaki, JP;
Yoshinari Watanabe, Kashiwazaki, JP;
Hayato Sasaki, Kumagaya, JP;
Assignee:
KABUSHIKI KAISHA RIKEN, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D 5/00 (2006.01); F16J 9/26 (2006.01); F02F 5/00 (2006.01); C09D 7/12 (2006.01); C09D 179/08 (2006.01); C08K 7/04 (2006.01);
U.S. Cl.
CPC ...
F16J 9/26 (2013.01); C09D 5/00 (2013.01); C09D 7/1291 (2013.01); C09D 179/08 (2013.01); F02F 5/00 (2013.01); C08K 7/04 (2013.01); C08K 2201/016 (2013.01);
Abstract
A piston ring having a resin-based film covering at least one of the upper and lower sides, wherein the resin-based film contains a fibrous filler with a mean fiber diameter of 50 to 500 nm and an aspect ratio of 30 to 500, wherein the fibrous filler in the resin-based film to align roughly parallel to the film surface.