Patent ID: 7901308

Claim:
A pulley for a continuously variable transmission, the pulley comprising: a supporting shaft; a fixed half-pulley, wherein the fixed half-pulley is coaxial and fixed to said supporting shaft; a mobile half-pulley, wherein the mobile half-pulley is coaxial to said supporting shaft and is slidable with respect to said fixed half-pulley, the fixed and mobile half-pulleys defining a race of variable amplitude and the race being engageable by a belt of a drive; and a device for compensating the axial thrust, the device comprising a first cam and a second cam, wherein said fixed half-pulley and said mobile half-pulley are rigidly connected to the first cam and the second cam respectively, said first and second cam being in contact with one another to impart an additional axial thrust on said mobile half-pulley in a direction of compression of said belt in response, in use, to a torque acting on said pulley; wherein said fixed half-pulley is fixed to said supporting shaft, and wherein said first cam is defined by a single tubular body made of plastic material co-moulded on said supporting shaft, said body being made of plastic material forming a supporting bushing on which said mobile half-pulley is slidably fitted.