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. 16, 1976
Filed:
Aug. 14, 1975
Dale H Unruh, Peoria, IL (US);
Caterpillar Tractor Co., Peoria, IL (US);
Abstract
A steering system for an articulated vehicle having one axle mounted thereon in a wagon-steer mode in addition to the conventional articulated-steer mode. A steering control valve, which is responsive to the movement of a manual steering control element, is ported to admit hydraulic fluid sequentially, first to a pair of wagon-steer cylinders and then to a pair of articulated-steer cylinders in both left and right steering control. The steering of the vehicle is initially through the wagon-steer movement of the one axle to facilitate high speed handling, which requires relatively small directional changes in the steering system, and is secondly through the articulated-steer movement in sequence to the wagon-steer movement to facilitate low speed maneuvering, which requires large directional changes in the steering system.