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:
Dec. 03, 1991
Filed:
Sep. 12, 1990
Applicant:
Inventors:
Yasuyoshi Emori, Saitama, JP;
Yukimitsu Ninamibata, Saitama, JP;
Assignee:
Jidosha Kiki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B / ; F16K / ;
U.S. Cl.
CPC ...
13762523 ; 13762524 ; 9137 / ;
Abstract
A rotary valve for power steering apparatus includes an input shaft, an output shaft disposed in axial alignment with the input shaft and connected thereto by a torsion bar, a valve rotor formed on the input shaft, and a valve sleeve connected to the output shaft and fitted over the valve rotor. A return oil path in the input shaft is formed inside a step defined in the internal surface of the valve sleeve while a return oil path in the valve sleeve is formed in a cylindrical portion of an increased internal diameter and extends therefrom along the step to define a return flow groove.