Patent ID: 7264564

Claim:
Cone pulley continuously variable transmission (CVT) comprising: a shaft, a first cone pulley that is integral with the shaft, a second cone pulley that is non-rotatably connected to the shaft and in an axially movable manner, a support ring that is axially immovably mounted to the shaft at a distance from a rear side of the axially movable cone pulley, a radially inner pressure chamber that is formed between the axially movable cone pulley and the support ring, wherein the inner pressure chamber is variable in the axial direction and is pressurized through a first passageway in the shaft for axially moving the axially movable cone pulley, and a radially outer pressure chamber that is variable in an axial direction and is pressurized through a second passageway in the shaft for axially moving the axially movable cone pulley, wherein the second passageway inside the shaft is connected to the radially outer pressure chamber via a passageway in the axially movable cone pulley, and wherein the inner and outer pressure chambers are separated from each other by an axially-extending cylindrical annular wall.