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. 17, 1993
Filed:
Sep. 04, 1991
Shin Takehara, Higashi Hiroshima, JP;
Hiroshi Ohmura, Hatsukakaichi, JP;
Ryuya Akita, Hiroshima, JP;
Isamu Chikuma, Maebashi, JP;
Hiroyuki Ito, Maebashi, JP;
Hiroshi Eda, Maebashi, JP;
NSK Ltd., Tokyo, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
A rear wheel steering apparatus for a vehicle, comprises a hydraulic cylinder for displacing a steering rod connected to left and right rear wheels axially, a centering spring for biasing the steering rod toward a neutral position, and a centering spring cancelling mechanism for preventing a biasing force of the centering spring from acting on the steering rod. A partition wall of the hydraulic cylinder defines an oil chamber in the cylinder and is formed as a cup shape having a central concave portion which constitutes a pressure chamber of the centering spring cancelling mechanism.