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. 22, 2012
Filed:
Apr. 01, 2009
Katsuji Watanabe, Saitama, JP;
Yasuo Shimizu, Saitama, JP;
Tsuyoshi Matsuo, Saitama, JP;
Yousuke Tanaka, Saitama, JP;
Katsuji Watanabe, Saitama, JP;
Yasuo Shimizu, Saitama, JP;
Tsuyoshi Matsuo, Saitama, JP;
Yousuke Tanaka, Saitama, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
An electric power steering apparatushas an electric motorfor supplying an auxiliary force to a steering force inputted from a steering wheel, and transmits the steering force including the auxiliary force to a steered road-wheelat least partially via a rack-and-pinion mechanism, thereby performing steering of a vehicle. The rack-and-pinion mechanismincludes: a pinionprovided at a pinion shaftconnected to the steering wheel; a rackthat is provided over a predetermined width at a rack shaftconnected to the steered road-wheel, and that is engaged with the pinion; and a rack guidefor urging the rack shafttoward the pinion. A pressure angle αof a tooth root of the rackis set to be greater than a pressure angle αof a tooth tip of the rack