Patent ID: 8715134

Claim:
A stepless gear ratio variator for wind generators wherein the transmission of motion between a driving member and a driven member takes place through friction of the respective convex contact surfaces translating simultaneously along respective incident axes of rotation; said surfaces being constrained, in use, to remain constantly in contact; wherein said contact surfaces are constrained to remain permanently in contact by means of a pair of support brackets, and in that said support brackets are mutually connected in an articulated manner by means of a pair of plates, pivoted to said same support brackets according to axes passing through the centre of said contact surfaces of said driven and driving members; wherein each of the two said members, responsible for the transmission of motion through friction, is integral with the end of a respective hollow shaft with respect to which it can be subjected to brief regulating axial sliding movements; wherein said regulating axial sliding movements, necessary to ensure an appropriate preload of the two members during mounting, take place by means of threaded ring nuts screwed close to the elements to obtain the necessary contact tension for correct operation of the assembly.