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. 18, 2009
Filed:
Apr. 16, 2004
Akihiko Shiina, Osaka, JP;
Hiroaki Shinto, Osaka, JP;
Mitsuharu Minami, Osaka, JP;
Noritake Okawa, Osaka, JP;
Masayoshi Sakuda, Osaka, JP;
Akihiko Shiina, Osaka, JP;
Hiroaki Shinto, Osaka, JP;
Mitsuharu Minami, Osaka, JP;
Noritake Okawa, Osaka, JP;
Masayoshi Sakuda, Osaka, JP;
JTEKT Corporation, Osaka, JP;
Abstract
An electric power steering device provided with two belleville springs for suppressing the axial movement of a worm rotated by a steering-assisting electric motor and having shaft portions at its both end portions, and limiting members for limiting the deflection amounts of the two belleville springs. The limiting members are respectively disposed at portions along the outer circumferences of the shaft portions at both end portions of the worm, the respective inner circumferential portions of the two belleville springs are formed into flat portions, the outer circumferential portions thereof are respectively formed into tapered portions having a taper shape, and the limiting members are made contact with the flat portions, thereby limiting the deflection amounts of the tapered portions. Hence, the limiting members can be provided without increasing the size of the worm serving as a small gear.