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:
Jan. 09, 1990
Filed:
Feb. 18, 1987
Thomas R Brown, Plainfield, IL (US);
Daniel D Morrow, Burlington, IA (US);
J. I. Case Company, Racine, WI (US);
Abstract
A three point implement hitch arrangement for a tractor including a frame assembly, a pair of draft arms pivotally supported on the frame assembly intermediate their ends and lift cylinders having a cylinder portion pivotally supported on the frame assembly above the draft arms and having a rod portion pivotally connected to the draft arms, forwardly of the draft arm pivotal connections. The lift cylinders are connected in series, wherein the area of the rod end of one cylinder is equal to the area of the head end of the second cylinder, whereby the cylinders may be operated independently to tilt the implement or operated in unison to lift the implement, eliminating the requirement for a complex structural support and control.