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:
Jun. 02, 2020
Filed:
Oct. 24, 2018
Kabushiki Kaisha Riken, Chiyoda-ku Tokyo, JP;
Kazuya Kameda, Tokyo, JP;
Hiroshi Maruyama, Tokyo, JP;
Yuuichi Ishida, Tokyo, JP;
Takuma Sekiya, Tokyo, JP;
KABUSHIKI KAISHA RIKEN, Chiyoda-ku, Tokyo, JP;
Abstract
Provided is a sliding member having a hard carbon coating that makes high wear resistance compatible with a low coefficient of friction and that has excellent peeling resistance. A sliding member () includes a base member () and a hard carbon coating () formed on the base member (). The indentation hardness of the hard carbon coating () decreases gradually from the base member side to the surface side. The hard carbon coating () has an indentation hardness distribution at 0≤T/Ttotal≤0.6 approximated by a first line and an indentation hardness distribution at 0.9≤T/Ttotal≤1 approximated by a second line, and the intersection between the first line and the second line (T2/Ttotal, H2) satisfies Expression (1), (H3−H1)×T2/Ttotal+H1<H2≤0.9×H1, and Expression (2), 0.6≤T2/Ttotal≤0.9.