Patent ID: 8365693

Claim:
A camshaft assembly comprising: an inner shaft; an outer tube surrounding and rotatable relative to the inner shaft; two groups of cam lobes mounted on the outer tube, the first group of cam lobes being fast in rotation with the outer tube, and each cam lobe of the second group being rotatably mounted on the outer surface of the tube and connected for rotation with the inner shaft by at least one drive member passing through circumferentially elongated slots in the outer tube; wherein each drive member comprises two drive components engaged with fixed alignment in the cam lobe, and at least one threaded fastener, separate from the two drive components, that is rotatable relative to at least one drive component to clamp the two drive components against respective flat surfaces on the inner shaft, whereby, during tightening of each fastener, neither drive component rotates relative to the respective flat surface on the inner shaft.