Patent ID: 7628266

Claim:
A driven roller element, comprising: a central body ( 1 ), as well as a roller unit ( 2 ) extending around the central body ( 1 ), which roller unit ( 2 ) is arranged as extending on a non-circular continuous track around the central body ( 1 ) and movable around the central body ( 1 ) through the rolling-off of rollers ( 3 ) of the roller unit ( 2 ) on an internal side of the roller unit ( 2 ), and the rollers ( 3 ), on an external side of the roller unit ( 2 ) on one side of the central body ( 1 ), being provided for rolling-off on a rigid counter body ( 5 ), wherein the roller element ( 10 ) comprises drive means, which engage in the roller unit ( 2 ) and drive the roller unit ( 2 ) relative to the central body ( 1 ), and wherein the roller unit ( 2 ) is provided for rolling-off on a further body ( 5 , 24 ), wherein the roller unit ( 2 ) and the further body ( 5 ) comprise means ( 64 , 66 ; 37 , 55 ; 87 , 55 ) shaped corresponding to each other and meshing together for the positive interlocking force transmission.