Patent ID: 7789779

Claim:
A continuously variable transmission comprising: conical disk pairs on an input side and on an output side of the transmission, each of which pairs includes an axially fixed disk and an axially displaceable disk, one disk pair carried on an input-side shaft and another disk pair carried on an output-side shaft, wherein the axially displaceable disk is non-rotatably connected to its associated shaft and is axially displaceable by a plurality of respective axially-extending, circumferentially-distributed teeth formed on an inner surface of the axially displaceable disk and a plurality of corresponding and interengaging axially-extending circumferentially-distributed teeth on a toothed region of the outer surface of the associated shaft that interengage with the teeth on the axially displaceable disk; an endless torque-transmitting means carried by the disk pairs for transmitting torque between the disk pairs, wherein at least one of the shafts includes at least one axial bore extending in the longitudinal direction of the shaft, from which at least one transverse bore extends from the at least one axial bore to an outlet at an outer surface of the at least one shaft, wherein the outlet is located on the shaft outer surface at the toothed region of the shaft and at a position on the shaft outer surface that is always overlapped by the axially displaceable disk over a full range of axial displacement of the axially displaceable disk; and wherein a single axially-extending tooth of the shaft is eliminated at the transverse bore outlet to provide a flow channel for communication with a pressurized-hydraulic-fluid chamber for axially shifting the axially movable disk along the shaft.