Patent ID: 7997053

Claim:
An assembly comprising: a soil treatment machine having a hood covering a soil treatment tool; a traction vehicle having a fixed support arm connected to the soil treatment machine, the traction vehicle driving the soil treatment machine across ground, wherein the fixed support arm includes a bracket at a distal end of the fixed support arm; and a connecting mechanism connecting the bracket of the fixed support arm to the hood of the soil treatment machine so that the soil treatment machine can move vertically relative to the fixed support arm in response to unevenness of the ground over which the soil treatment machine is driven, wherein the connecting mechanism comprises first, second, and third pairs of connecting rods, each of the connecting rods having the same length, between opposite first and second ends of the connecting rod, the first, second, and third pairs of connecting rods being articulated at the first ends of the connecting rods to the hood and at the second ends of the connecting rods to the bracket, and when viewed perpendicular to the connecting rods, the first, second, and third pairs of connecting rods are articulated to the hood and to the bracket so that the first pair and the second pair of connecting rods define a first parallelogram, and the second pair and the third pair of the connecting rods define a second parallelogram, the first and second parallelograms being deformable by articulation of the first, second, and third pairs of connecting rods with respect to the hood and the bracket, while maintaining parallelogram shapes, on both sides of first and second closing first and second axes of the first and second parallelogram, at which adjacent sides of the first and second parallelograms, respectively, are co-linear, during vertical movement of the soil treatment machine relative to the fixed support arm of the traction vehicle.