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. 05, 1991
Filed:
Aug. 20, 1990
Tsukasa Okamoto, Kariya, JP;
Shuji Ohta, Kariya, JP;
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, JP;
Abstract
A fully hydraulic power steering apparatus provided with a hydraulic power cylinder driven by turning a steering wheel to provide rear wheels of an industrial vehicle with a pivoting motion, to thereby steer the vehicle, and an error correcting unit for mechanically correcting an error between an angle of turn of the steering wheel and a corresponding stroke motion of the hydraulic power cylinder. The error correcting unit mechanically derives respective linear movements from the angle of turn of the steering wheel and the corresponding stroke of the power cylinder, and utilizes a difference between both mechanical linear movements for operating a directional control valve for controlling a flow of a pressurized oil supplied from a power steering valve unit toward the power cylinder to correct the amount of the stroke of the power cylinder with respect to the amount of angle by which the steering wheel is turned.