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:
Apr. 15, 2008
Filed:
Mar. 15, 2005
Nobuhiro Ishii, Gunma, JP;
Hisao Ubukata, Gunma, JP;
Nobuhiro Ishii, Gunma, JP;
Hisao Ubukata, Gunma, JP;
NSK Ltd., Tokyo, JP;
NSK Steering Systems Co., Ltd., Tokyo, JP;
Abstract
A ball bearingserving as a support reference for a pinion shaftis located directly under a worm wheelThus, even when a temperature change occurs around the electric power steering apparatus, the engagement position between the worm wheeland the wormshifts only slightly in the axial direction of the pinion shaftFurthermore, a bearing holeinto which an outer race of a lower needle bearingis pressed and a bearing holeinto which an outer race of an upper ball bearingis pressed are formed in a common lower gear boxand can be fabricated by through processing using a boring tool from the bearing holeside.