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:
Dec. 08, 1981
Filed:
Mar. 17, 1980
Henry J Lange, Juneau, WI (US);
Deere & Company, Moline, IL (US);
Abstract
The draft control consists of a three-point hitch mechanism which automatically raises or lowers the hitched implement so that a predetermined draft load can be maintained. An increase or decrease draft load on the implement is sensed by an upper hitch arm. A linkage mechanism transfers this force through a number of links of proper length, such that, the implement is raised with excessive draft load and lowered the implement as the draft load decreases from the excessive level. The draft load that is to be maintained is determined by the location of the middle link in one of a plurality of holes in the attaching linkage. Structure is provided to lock out the draft control.