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:
Sep. 01, 2015
Filed:
Mar. 15, 2013
Steering linkage interface between steering cylinder and ground drive pump displacement control arms
Deere & Company, Moline, IL (US);
Thomas D. Bebernes, Ottumwa, IA (US);
Stephen E O'Brien, Ottumwa, IA (US);
Thomas A. Nichols, Eldon, IA (US);
Mitchell R. Usasz, Ottumwa, IA (US);
Kyle R. Teach, Ottumwa, IA (US);
David V. Rotole, Bloomfield, IA (US);
Walter C. Wright, Pella, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A four-bar linkage is provided as a mechanical interface for transferring respective outputs from a speed/direction control device and a hydraulic steering cylinder to displacement control arms of a pair of pumps of a dual-path hydrostatic transmission including a pair of motors respectively coupled for driving a pair of front wheels of a vehicle. The hydraulic steering cylinder is fixed and has a piston rod slidably coupled to an input arm of the four-bar linkage in such a way that a rotation speed decrease occurs as the arm and a linked control plate are pivoted from a neutral position, the control plate transferring pivotal movement to effect differential movement of the displacement control arms. This results in the vehicle speed decreasing during a turn.