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:
May. 26, 1992
Filed:
Dec. 12, 1990
Yoshihito Imura, Aichi, JP;
Keita Ozeki, Aichi, JP;
TRW Steering & Industrial Products (Japan) 051156651, Minato, JP;
Abstract
A power steering device comprising an input shaft connected to a steering shaft, an output shaft connected to a rack for driving vehicle wheels, a servo valve including a valve sleeve surrounding the input shaft and engaging the output shaft, and a torsion bar with both ends secured to the input shaft and the output shaft. In the power steering device, the torsion bar is positioned and secured via a balance pin in the input shaft. The balance pin has multiple projecting portions arranged alternately on opposite sides of the balance pin along the length of the balance pin. After inserting the balance pin into the input shaft and the torsion bar, the input shaft and the torsion bar are relatively rotated by the protruding portions of the balance pin. The servo valve is thus correctly centered. The hydraulic pressure produced by the servo valve is balanced.