Implement attachment interface for the coupling of operating implements to a utility vehicle and valve arrangement

An implement attachment interface for the coupling of operating implements to a utility vehicle with six double-acting hydraulic cylinders that can be repositioned in length and that are arranged in the manner of a hexapod between the utility vehicle and a coupling frame, that is provided with coupling means for the attachment of operating implements and that generally engage in the corners of a triangle on the side of the vehicle as well as the corners of a triangle on the side of the frame and that contain two upper hydraulic cylinders arranged alongside each other and that extend from one of the vehicle and the frame in a direction converging towards each other, two lower hydraulic cylinders that are arranged alongside each other and extend from the other of the vehicle and the frame in a direction converging towards each other as well as two hydraulic cylinders at the sides, wherein:

• for a pendulous movement to the right the lower right hydraulic cylinder and the upper left hydraulic cylinder are hydraulically coupled to one another so as to extend synchronously with one another and the lower left hydraulic cylinder and the upper right hydraulic cylinder are hydraulically coupled to one another so as to retract synchronously with one another;
• for a pendulous movement to the left the lower right hydraulic cylinder and the upper left hydraulic cylinder are hydraulically coupled to one another so as to retract synchronously with one another and the lower left hydraulic cylinder and the upper right hydraulic cylinder are hydraulically coupled to one another so as to extend synchronously with one another;
• and,
• wherein the retraction strokes are equal to the extension strokes.