Patent ID: 8047941

Claim:
A drive unit ( 1 ) for a continuously variable rotational speed control having a reversal of rotational direction for at least one input shaft, the drive unit ( 1 ) comprising: two identical transmission modules ( 2 , 3 ) each comprising a means for power splitting, a means for continuously variable rotational speed control and a means for reversal of rotational direction, and the two transmission modules ( 2 , 3 ) being driven by a common input ( 4 ), and the two transmission modules ( 2 , 3 ) being arranged in series with respect to the common input ( 4 ); and each of the means for the reversal of rotational direction comprises a reversing gear assembly ( 8 c ) such that drive from the common input ( 4 ) is output from the two transmission modules ( 2 , 3 ) in forward and reverse rotational directions, the reversing gear assembly ( 8 c ) being located downstream from the means for power splitting and the means for continuously variable rotational speed control with respect to a flow of rotational drive from the common input ( 4 ).