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:
Oct. 15, 2002
Filed:
Jan. 28, 2000
Masaaki Toda, Iwata, JP;
Koji Tateishi, Iwata, JP;
Isamu Yoshida, Iwata, JP;
Kiyoshige Yamauchi, Iwata, JP;
Morihisa Yoshioka, Iwata, JP;
NTN Corporation, Osaka, JP;
Abstract
An electrically powered steering device comprises a ball screw mechanism for transmitting a steering force from a steering wheel to steerable vehicle wheels. The ball screw mechanism includes a rotary nut having a nut body in which a circulating passage is formed so as to extend axially thereof, and end caps and secured respectively to opposite ends of the nut body . Each of the end caps and has defined therein respective guideways and for balls that communicate opposite ends of the circulating tunnel with a ball rolling passage . The end caps and and the nut body are made of a sintered alloy. The nut body has an outer periphery of one end thereof that is axially progressively reduced in diameter to define a tapered surface.