Continuously variable transmission with radial drive

A CVT variator assembly which includes a first drive disk which is rotatable about a central axis in a first direction and which has a first disk face, the variator assembly comprising -

• a variator arranged concentrically with the first disk and which includes -
• a structure unit having a circular rim;
• at least one follower housed within the structure unitand which is radially displaceable between the central axis and the rim, the follower including a driving roller which is mounted in friction drive contact with the first disk face, the follower further including at least one cam follower ;
• at least one rotatable spiral cam arranged intermediate the drive disc and the structure unit and including a spiral cam cavity, the spiral cam being connected to the structure unit such that the roller and the cam follower at least partially protrudes through the spiral cam cavity with the cam cavity acting on the cam follower , the spiral cam being rotatable about the central axis to radially displace the roller for varying ratio of the variator, the spiral cam cavity being configured such that it provides continuous clearance for the roller uninterruptedly to engage the disk face frictionally for the whole of the radial distance between the central axis and the rim during rotation of the spiral cam;
• and
• a variator input shaft.