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:
Nov. 22, 1988
Filed:
Jul. 08, 1987
Applicant:
Inventor:
Naoyuki Maeda, Aichi, JP;
Assignee:
Tokai TRW & Co. Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B62D / ;
U.S. Cl.
CPC ...
180142 ; 180 791 ; 180148 ;
Abstract
A rack-pinion type electrically powered steering apparatus is provided with an electronic control circuit adapted to control a motor driving current which is applied to a motor for power assistance, in response to a steering load characteristic and/or a vehicle speed characteristic. The steering apparatus is also provided with a rack end proximity sensor adapted to detect a position adjacent the both ends of the rack during a steering operation, and a device for providing the motor driving current with an attenuation characteristic in response to the detected signal from said rack end proximity sensor.