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. 20, 2001
Filed:
Dec. 28, 1999
Applicant:
Inventor:
Yoshifumi Obata, Sakurai, JP;
Assignee:
Koyo Seiko Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B62D 5/065 ;
U.S. Cl.
CPC ...
B62D 5/065 ;
Abstract
A power steering apparatus that is arranged in that hydraulic force to be supplied to a hydraulic cylinder is in a condition in which the hydraulic force is not raised even though an electric motor performs stand-by operations when a steering angle or an input torque is smaller than a predetermined value, and in that smooth steering is enabled without causing abrupt changes in hydraulic force when the steering angle or the input torgue exceedes the predetermined value and the electric motor is started driving at proper revolutions according to operations of a steering wheel.