Patent ID: 7192213

Claim:
A system of coupling flanges, comprising: an internal conical ring; an external conical ring; semi-through side slots spread out regularly with respect to one another inside said external conical ring; and a flange having a rigid housing with a cylindrical axial passage coaxially accommodating said internal conical ring and said external conical ring, said internal and external conical rings cooperating through relative axial movement to link by friction said flange with a hollow shaft, and to define an annular space between an inside surface of said cylindrical axial passage and an outer surface of said external conical ring, said annular space making it possible to engage an end of said hollow shaft, said external conical ring being elastically deformable radially so as to clamp by pinching said end of said hollow shaft in said annular space during an end-wise movement of said internal conical ring and said external conical ring, wherein, said external conical ring has an annular external shoulder forming at a bottom of said annular space and against which is applied to abut a transversal face of said end of said shaft.