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:
Aug. 10, 1999
Filed:
Feb. 12, 1997
Hirofumi Matsuoka, Souraku-gun, JP;
Koyo Seiko Co., Ltd., Osaka, JP;
Abstract
A power steering apparatus has a flow amount detecting sensor for detecting an actuating oil flow amount on the exit side of an actuator operated by an actuating oil pressure generated by a hydraulic pump, and a control circuit for controlling the rotation of the motor for driving the hydraulic pump. The power steering apparatus has a flow amount variation detecting sensor for detecting a variation amount of an actuating oil flow amount on the exit side of the actuator and a control circuit for controlling the motor rotation on the basis of the variation amount. This is to compensate for the decrease in the flow of oil to the actuator caused by an expansion of a hose between the pump and the actuator.