Patent ID: 7841099

Claim:
Device forming a sight-vane for three-dimensional measuring machine, extending along one direction, called longitudinal direction, comprising: a calibrated cylindrical part mounted on a longitudinal end of the device forming a sight-vane, a cylindrical tail for fitting the device forming a sight-vane on the machine piece to be measured, mounted on a longitudinal end of the device opposite to the said calibrated cylindrical part, and adapted to be received in a bore, called receiving bore, on machine piece to be measured, a plane surface, called bearing surface, orthogonally to the said longitudinal direction, and suitable for coming into contact with the said machine piece to be measured once the cylindrical tail is received in said receiving bore, wherein: a central bore extending longitudinally from one side to the other of the device forming a sight-vane and having at the said cylindrical tail a conical part, at least a slot in said tail, each slot being radially transverse, ending in said conical part of said central bore, and extending longitudinally along a portion of said cylindrical tail, enabling a radial deformation of said cylindrical tail, an expansion screw having a conical part with the same conicity as the conical part of the said central bore, said expansion screw being received in said central bore and adapted to move in a longitudinal direction in the central bore and thus enabling a radial expansion of said cylindrical tail in such a way that the assembly of said cylindrical tail and said receiving bore of the machine piece to be measured has no clearance.