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. 29, 1989
Filed:
Oct. 11, 1988
Toyota Jidosha Kabushiki Kaisha, Aichi, JP;
Abstract
A four-wheel steering system in a wheeled vehicle includes a lateral control shaft operatively connected at its opposite ends with a set of rear steerable road wheels, and a rear-wheel steering mechanism operatively connected to a front-wheel steering linkage for effecting axial displacement of the control shaft in response to operation of the front-wheel steering linkage. In the rear-wheel steering mechanism, a hydraulic power cylinder is adapted to control axial displacement of the control shaft in such a manner that the control shaft is returned to and retained in a neutral position in the occurrence of unexpected trouble in a hydraulic control circuit of the power cylinder to retain the rear road wheels in their neutral positions.