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:
Jun. 27, 1989
Filed:
Jun. 27, 1988
James A Redelman, Indianapolis, IN (US);
James W Morrow, Indianapolis, IN (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A steer-by-driving control for controlling a hydrostatic steering unit to permit consistent operator input during forward and reverse travel has a valve assembly including a distribution valve and a pair of sleeve valves. The sleeve valves are rotatably mounted on the distribution valve and are interconnected by a gear arrangement. One sleeve valve is rotated by the operator in response to a steer request while the other sleeve member, due to the gearing, rotates oppositely. The distribution valve member controls fluid flow through forward and reverse steer passages formed in the sleeve valves to a signal valve for distribution to a control member of a hydrostatic unit. The distribution valve member is subjected to rotary input from the hydrostatic steering unit to stop fluid flow when the proper steer position has been reached. The signal valve is positioned according to the direction of the vehicle operation to selectively send the steer signals to the proper portions of the hydrostatic control.