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:
Nov. 27, 1990
Filed:
Apr. 25, 1989
Laurence L Miller, West Lafayette, IN (US);
TRW Inc., Lyndhurst, OH (US);
Abstract
A vehicle steering system having more than one set of steerable wheels includes a hydrostatic steering unit connected in fluid communication with actuatable hydraulic steering motors operatively coupled with one set of wheels. The hydraulic steering motors are actuated when hydraulic fluid is applied thereto. Steering movement of the one set of wheels is effected in response to actuation of the hydraulic steering motors. The hydrostatic steering unit has an input shaft drivingly connected with an output shaft of an electric motor. The speed and direction of rotation of the output shaft of the electric motor, and hence the speed and direction of rotation of the input shaft of the hydrostatic steering unit, is controlled in response to a control output signal from a microcomputer. The control output signal from the microcomputer is generated in response to the magnitude and direction of steering torque applied to the steering wheel, the vehicle speed, and the positions of the sets of steerable wheels. The flow of the hydraulic fluid to the hydraulic steering motors is proportional to the rotational speed of the input shaft of the hydrostatic steering unit. The direction of the hydraulic fluid flow depends upon the direction of rotation of the input shaft of the hydrostatic steering unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile