Patent ID: 7004877

Claim:
A variable speed transmission arrangement comprising a central shaft ( 4 ) which extends through a first traction wheel ( 7 - 1 ) of an infinitely variable toroidal drive ( 8 ), said traction wheel ( 7 - 1 ) having a traction surface ( 6 ) on one end face ( 5 ), a summing gear set ( 12 ) with a planet carrier disposed adjacent said variable toroidal drive ( 8 ), said central shaft ( 4 ) being connected at its shaft end ( 10 ) adjacent the other end face ( 9 ) of the traction wheel ( 7 - 1 ) to the planet carrier ( 11 - 1 ) of said summing gear set ( 12 ) for rotation with the planet carrier ( 11 - 1 ), said traction wheel ( 7 - 1 ) and said planet carrier ( 11 - 1 ) being also joined for concurrent rotation, said traction wheel ( 7 - 1 ) having on its outer circumference at the largest diameter an axial toothing ( 14 - 1 ) and the planet carrier ( 11 - 1 ) having a corresponding inner axial toothing ( 15 - 1 ) in engagement with the toothing ( 14 - 1 ) on said traction wheel ( 7 - 1 ).