Patent ID: 9408340
Filing Date: 2016-08-09
CPC Classification: A01B,A01D

Claim Text:
1. A coupling device for an agricultural machine, comprising: a coupling support that can be mounted on a three-point hitch of a tractor; at least one arm articulated to the coupling support and protruding from the coupling support in a direction parallel to a longitudinal center line of the tractor, the arm carrying, in an articulated manner, a chassis provided to carry a work element; and an upper connecting-rod, a lower connecting-rod, and a central connecting-rod, wherein each of the upper connecting-rod and lower connecting-rod are articulated to the coupling support and to the central connecting-rod to form, projected in a vertical plane parallel to the longitudinal center line of the tractor, a deformable quadrilateral, and the central connecting-rod is articulated to the chassis.