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:
Sep. 07, 1982
Filed:
Feb. 15, 1980
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An operating valve assembly for a power steering unit comprises inner and outer sleeves in sliding contact with each other and relatively rotatable in response to the twisting of a torsion bar corresponding to a steering load. The outer sleeve is formed in its inner circumferential surface with a plurality of recesses circumferentially spaced apart and having circular opening edges, which recesses are alternately connected to a pump and a drain chamber. The inner sleeve is formed in its outer circumferential surface with grooves establishing communication between adjacent ones of the aforesaid recesses. The outer sleeve is formed with apertures opening into the respective grooves, with the apertures being alternately connected to one or the other of the power cylinder chambers. The operating valve assembly is inexpensive and easy to manufacture.