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:
Jan. 17, 2012
Filed:
Jul. 23, 2008
Yusuke Okamoto, Kanagawa, JP;
Yoshiteru Yasuda, Yokohama, JP;
Takuro Yamaguchi, Yokohama, JP;
Makoto Kano, Yokohama, JP;
Yusuke Okamoto, Kanagawa, JP;
Yoshiteru Yasuda, Yokohama, JP;
Takuro Yamaguchi, Yokohama, JP;
Makoto Kano, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A gear comprised of a tooth surface and a hard carbon film formed on at least a part of the tooth surface. When the gear is used in lubricant including a specific component, a friction of a tooth surface of the gear is largely decreased, and therefore the gear performs an excellent power transmission efficiency. Further, when the gear is employed in a planetary gear mechanism or speed reducing mechanism which has a plurality of meshing portions of gears, the power transmission efficiency of the mechanism is also improved.