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:
May. 26, 2009
Filed:
Feb. 03, 2004
Tetsuya Murakami, Osaki, JP;
Atsuya Miyata, Osaka, JP;
Hiroshi Murataka, Koriyama, JP;
Akihiro Hironaka, Koriyama, JP;
Tetsuya Murakami, Osaki, JP;
Atsuya Miyata, Osaka, JP;
Hiroshi Murataka, Koriyama, JP;
Akihiro Hironaka, Koriyama, JP;
JTEKT Corporation, Osaka, JP;
Gates Unitta Asia Company, Osaka, JP;
Abstract
An electric power steering apparatus includes a reduction gear mechanism () for reducing the rotation speed of an output shaft () of an electric motor (). The reduction gear mechanism () comprises an inscribed gear () rotatable interlockingly with the output shaft (), and a circumscribed gear () in which the inscribed gear () is inscribed. An endless belt connects a driving pulley () integrally rotatable with the circumscribed gear () and a driven pulley () disposed so as to surround a steerable shaft. By heightening the reduction gear ratio by the speed reduction using the inscribed gear () and the circumscribed gear (), the reduction gear mechanism () as a whole can achieve a high reduction gear ratio without making the diameter of the driving pulley () very small.