Patent ID: 8262533

Claim:
A transmission providing a gear ratio between an input shaft and an output shaft, the transmission comprising: a first annulus ring; a second annulus ring; a first sun wheel being rotatable around a central axis of the transmission; a second sun wheel being rotatable around the central axis of the transmission; at least one planet carrier being rotatable around the central axis of the transmission; a set of planet wheels, each wheel of the set of planet wheels comprising a plurality of different wheel segments, the planet wheels being attached to the planet carrier via rotational bearings and arranged to rotate epicyclically around the central axis; a sun wheel selection means configured to selectively establish interaction between one of the sun wheels and one of the wheel segments; and annulus ring selection means for selectively at least partially locking one of the first and second annulus rings relative to a reference system; wherein one of the wheel segments is configured to interact with the first annulus ring, and another one of the wheel segments is configured to interact with the second annulus ring.