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:
Jan. 02, 1990
Filed:
Apr. 15, 1988
Applicant:
Inventors:
Akinobu Matsuda, Osaka, JP;
Masamitsu Sakai, Osaka, JP;
Assignee:
Koyo Seiko Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B62D / ;
U.S. Cl.
CPC ...
180 791 ; 74422 ; 74498 ; 180147 ;
Abstract
A power steering apparatus in which a housing to contain a torque sensor for sensing seering torque, a small-sized motor for assisting steering, and a driving device for transmitting driving force of the motor to the steering shaft is made small-sized and disposed on the middle part of the steering shaft in the cab of the car, and, further, pressure angles of rack teeth engaging with a pinion shaft connected to the steering shaft reduce with the advance from the center of the toothed part of the rack to the end thereof so that steering assisting power is increased with the increase in the degree of steering angle.