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:
Sep. 15, 2009
Filed:
Feb. 15, 2007
Dong Hun Ha, Gyeonggi-do, KR;
Seong Soo Kim, Seoul, KR;
Gung Joo Nam, Gangwon-do, KR;
Mando Corporation, Seoul, KR;
Abstract
An electric power steering apparatus includes a pinion shaft coupled to a steering wheel shaft, a rack shaft coupled to the pinion shaft and having a ball screw, a ball nut provided in the ball screw through a plurality of balls, a first pulley coupled to the ball nut, a torque sensor sensing steering wheel torque, an electric motor for generating a steering assisting force according to the torque sensor signal, a second pulley at one end of the electric motor, and a belt connecting the first pulley to the second pulley to transmit the steering assisting force to the ball nut. The first or second pulley have a coating including 10 to 90 wt % molybdenum sulfide, 5 to 10 wt % antimony trioxide, 1 to 5 wt % antirust agent, 1 to 5 wt % auxiliary lubricant, and 1 to 3 wt % organic adhesive in a 1 to 10 wt % solvent.