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:
Aug. 11, 2009
Filed:
Aug. 10, 2004
Takashi Murata, Yokohama, JP;
Takuya Hirata, Yokohama, JP;
Makoto Kano, Yokohama, JP;
Yutaka Mabuchi, Yokohama, JP;
Takahiro Hamada, Yokohama, JP;
Masashi Yamaguchi, Yokohama, JP;
Takashi Murata, Yokohama, JP;
Takuya Hirata, Yokohama, JP;
Makoto Kano, Yokohama, JP;
Yutaka Mabuchi, Yokohama, JP;
Takahiro Hamada, Yokohama, JP;
Masashi Yamaguchi, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A chain drive system includes a drive sprocket, a driven sprocket and a chain looped over the drive sprocket and the driven sprocket. The chain and the sprocket having respective sliding surfaces slidable relative to each other in the presence of lubricating oil, and any adjacent chain components of the chain having respective sliding surfaces slidable relative to each other in the presence of lubricating oil. At least one of the sliding surfaces between the chain and the sprocket and at least one of the sliding surfaces between any adjacent chain components have hard carbon coatings formed on base portions thereof. Each of the hard carbon coatings has a hydrogen content of 10 atomic % or less.