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. 18, 2004
Filed:
Nov. 21, 2001
Applicant:
Inventors:
Assignee:
NTN Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 2/522 ;
U.S. Cl.
CPC ...
F16H 2/522 ;
Abstract
A portion of a steering shaft capable of being advanced and retracted defines a ball screw shaft of a ball screw mechanism A motor rotor of an electrically driven motor for providing a steering assist force is externally mounted on a rotary nut Mounting of the motor rotor onto the rotary nut is carried out so that the both can be adjustably aligned. By way of example, the rotary nut has an outer peripheral surface formed with an annular protrusion of a arcuate longitudinal sectional shape, having a surface thereof formed with a plurality of axially extending surface indentations arranged side by side in a direction circumferentially of the rotary nut