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. 18, 2007
Filed:
Apr. 05, 2006
Akira Fujiki, Yokohama, JP;
Yukihiro Maekawa, Yokohama, JP;
Yutaka Mabuchi, Yokohama, JP;
Takashi Murata, Yokohama, JP;
Takashi Suzuki, Matsudo, JP;
Jyun-ichi Yamada, Matsudo, JP;
Tadayuki Tsutsui, Matsudo, JP;
Kei Ishii, Matsudo, JP;
Akira Fujiki, Yokohama, JP;
Yukihiro Maekawa, Yokohama, JP;
Yutaka Mabuchi, Yokohama, JP;
Takashi Murata, Yokohama, JP;
Takashi Suzuki, Matsudo, JP;
Jyun-ichi Yamada, Matsudo, JP;
Tadayuki Tsutsui, Matsudo, JP;
Kei Ishii, Matsudo, JP;
Nissan Motor Co., Ltd., Kanagawa, JP;
Hitachi Powdered Metals Co., Ltd., Chiba, JP;
Abstract
A sintered sprocket for a silent chain is obtained from a material with few addition elements by a simple densifying method. The sintered sprocket is made of an ferrous material having an ovarall composition containing Cu at 1 to 2%, C at 0.5 to 0.8%, Mn as an inevitable impurity at 0.10% or less, and balance of Fe and other inevitable impurities by mass and has a density of 7.1 Mg/mor higher, 65 HRA or higher as a hardness in the gear teeth, and a martensite, sorbite, bainite, or their mixed structure as a cross-sectional microscopic structure in at least the gear teeth and the peripheral area of the gear teeth.