Patent ID: 7029213

Claim:
Device comprising a first coupling element and a centering plate, said centering plate being designed to be fastened to a second coupling element to ensure the reproducible positioning of said second coupling element onto said first coupling element, said first coupling element comprising at least three pegs, said centering plate lying in a plane and comprising at least three hollow portions working with one of said at least three pegs during the coupling of said second coupling element to said first coupling element so as to determine the position of said centering plate relative to said first coupling element, each one of said at least three pegs comprising at least one spherical portion, wherein around each one of said at least three hollow portions a flexible zone is demarcated by at least one notch and connected to the rest of said centering plate by two torsion zones allowing the pivoting of said flexible zone about an axis in said plane relative to the rest of said centering plate and out of the plane of the centering plate on each side of said axis when said first coupling element is fastened onto said second coupling element.