Abstract: The invention concerns a chain for a chain transmission with chain links coupled by a parallel chain pins, each chain link having at least one link plate, the chain pins forming pivot axes for the link plates at a pitch distance whereby a chain link axis perpendicularly intersects the two pivot axes, said link plates having towards at least one end side of the link plate a cam surface for supporting the link plate on a cylindrical support surfaces of a sprocket wheel with a pitch angle. In accordance with the invention the cam surface ends in a convex curved plane with near the end side an increasing slope angle with the link axis whereby the slope angle increases to at least half of the pitch angle or to at least seven degrees.

Abstract: The invention concerns a chain for a chain transmission with chain links coupled by a parellel chain pins, each chain link having at least one link plate, the chain pins forming pivot axes for the link plates at a pitch distance whereby a chain link axis perpendicularly intersects the two pivot axes, said link plates having towards at least one end side of the link plate a cam surface for supporting the link plate on a cylindrical support surfaces of a sprocket wheel with a pitch angle. In accordance with the invention the cam surface ends in a convex curved plane with near the end side an increasing slope angle with the link axis whereby the slppe angle increases to at least half of the pitch angle or to at least seven degrees.

Abstract: Chain transmission, comprising a chain which is composed of a series of successive links which are each connected to one another in such a manner that they can pivot about a pivot axis, and a wheel which can rotate about an axis of rotation and has driver means which, during use, interact with the links of the chain. The chain transmission also comprises support means for guiding the links of the chain in such a manner that a pivot axis at a certain distance from the wheel is always at a constant speed when the wheel is rotating at a constant speed. The support means comprise a support, which rotates with the wheel, for guiding the links by interaction with the support surfaces arranged on the links, in such a manner that the distance between the axis of rotation and the pivot axis when a support surface is supported on the rotating support is variable.