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:
Apr. 05, 2022
Filed:
Jun. 15, 2018
Nippon Piston Ring Co., Ltd., Saitama, JP;
Nippon Itf, Inc., Kyoto, JP;
Takahiro Okazaki, Saitama, JP;
Yoshihiro Ito, Saitama, JP;
Hiroyuki Sugiura, Saitama, JP;
Shinya Kanazawa, Saitama, JP;
Hideki Moriguchi, Kyoto, JP;
Akinori Shibata, Kyoto, JP;
Takehiko Ooshiro, Kyoto, JP;
NIPPON PISTON RING CO., LTD, Saitama, JP;
NIPPON ITF, INC, Kyoto, JP;
Abstract
A sliding member () including a coating film () composed of a hard carbon layer on a sliding surface () of a base material (). The coating film has, when a cross section thereof is observed by a bright-field TEM image, a thickness within a range of 1 μm to 50 μm, and is configured by repeating units including black hard carbon layers (B), relatively shown in black, and white hard carbon layers (W), relatively shown in white, and laminated in a thickness direction, and comprise an inclined region, provided on a base material side, where thicknesses of white hard carbon layers (W) of the repeating units gradually increase in a thickness direction, and a homogeneous region\, provided on a surface side of the sliding member, where thicknesses of the white hard carbon layers (W) of the repeating units are the same or substantially the same in the thickness direction.