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:
Jul. 13, 2004
Filed:
Jan. 31, 2003
Osamu Sano, Kashihara, JP;
Hiroto Sasaki, Nara, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
An electric power steering apparatus includes a rolling bearing for supporting rotatably a worm that is rotated by a steering assisting electric motor ; a first resilient portion which is disposed in contact with the inner circumference of an inner ring of the rolling bearing and held on the worm so that it is extendable by a force in an axial direction applied to the worm ; and two resilient members and , held in contact with both ends of the inner ring , for restraining the movement of the worm in the axial direction. Even when the electric power steering apparatus has a single rolling bearing, the worm is moved in the axial direction by a steering force transmitted to the worm from a worm wheel in a steering range in which the motor is not driven, and the steering load in the steering range in which the motor is not driven is decreased.