Patent ID: 7909348

Claim:
An adjustable-length seat post for a bicycle, wherein the adjustable-length seat post comprises: a stanchion, configured to attach to a bicycle seat, having a first opening and a second opening opposite the first opening; a sliding tube; a locking device; and an energy transmission device; wherein the sliding tube is guided through the first opening into the stanchion; wherein the sliding tube is displaceable along a longitudinal direction of extension of the stanchion; wherein the sliding tube is movable relative to the stanchion from a first into a second position and conversely; wherein an overlap between stanchion and sliding tube in the first position is greater than in the second position; wherein the locking device can be transferred from a locking position into a releasing position and conversely; wherein in the locking position the sliding tube is fixed with respect to the stanchion; wherein the energy transmission device is set up to transmit energy from an external actuating element to be provided to the locking device for releasing and/or locking; and wherein, at least when the sliding tube is located in the second position, the energy transmission device is guided from an external actuating element to be supplied through the second opening of the stanchion as far as the locking device.