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. 07, 1984
Filed:
Jun. 21, 1982
David C Winter, Des Moines, IA (US);
Deere & Company, Moline, IL (US);
Abstract
A guidance system for use with tractor-mounted row crop cultivators and similar implements includes a pair of independent furrow followers mounted one behind the other on the implement for sensing implement position relative to a preestablished guidance furrow. Series-connected switches are controlled by furrow sensor arms to activate a solenoid valve-controlled hydraulic cylinder on a laterally movable parallel linkage hitch which replaces the standard three-point hitch on the implement. When the implement is raised from the ground, V-shaped stops under the sensor arms automatically position the sensors at the null point. Switches and an actuator on the hydraulic cylinder operate in response to movement of the tractor rockshaft to return the implement to center position in preparation for alignment with the next set of rows to be cultivated.