Patent ID: 7056252

Claim:
A transmission ( 1 ) for distributing drive torque to at least two output shafts ( 7 , 8 ), the transmission ( 1 ) having at least first and second planetary gear sets ( 2 , 3 ) which each have at least three shafts; wherein a first shaft ( 4 or 5 ) of each of the planetary gear sets ( 2 , 3 ) is connected with an input shaft ( 6 ); a second shaft ( 7 or 8 ) of each of the planetary gear sets ( 2 , 3 ) comprises an output shaft; a third shaft ( 9 or 10 ) of one of the first and second planetary gear sets ( 2 or 3 ) is operative connected, via an operative connection ( 11 ), with a third shaft ( 9 or 10 ) of the other of the first and the second planetary gear sets ( 3 or 2 ) so that when a rotational speed difference occurs between the two output shafts ( 7 , 8 ), a corresponding torque resulting from the speed difference is transmitted between the first and the second planetary gear sets ( 2 , 3 ) through the operative connection ( 11 ) to change the rotational speed difference; the operative connection ( 11 ) has a device for rotational speed inversion between the operatively connected shafts ( 9 , 10 ); and the device for rotational speed inversion has a ring gear ( 40 ) and a spur gear ( 32 ) meshing with the ring gear ( 40 ).