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:
Dec. 01, 2020
Filed:
Jan. 03, 2019
Kabushiki Kaisha Toyota Chuo Kenkyusho, Nagakute, JP;
Jtekt Corporation, Osaka, JP;
Masaru Okuyama, Nagakute, JP;
Hiroyuki Mori, Nagakute, JP;
Mamoru Tohyama, Nagakute, JP;
Noriyuki Emoto, Okazaki, JP;
Naohito Yoshida, Takahama, JP;
KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO, Nagakute, JP;
JTEKT CORPORATION, Osaka, JP;
Abstract
A sliding member has a sliding surface sliding under a wet condition in which a lubricant oil exists. The sliding surface is coated with a laminate film comprising an upper layer and a lower layer. The lower layer comprises hydrogen-free amorphous carbon (hydrogen-free DLC) and carbon particles dispersed on or in the hydrogen-free DLC. The hydrogen-free DLC has a hydrogen content of 5 atom % or less when the lower layer as a whole is 100 atom %. The upper layer comprises boron-containing amorphous carbon (B-DLC) and has protrusions on a surface side of the upper layer along the carbon particles of the lower layer. The B-DLC has a boron content of 1-40 atom % when the upper layer as a whole is 100 atom %. The protrusions have a particle diameter of 0.5-5 μm and exist with a density of 20 protrusions/100 μmor more.