Abstract: A mechanism (25) for transmitting torque from one or between several torque transmitting members (14A, 16A) for which sliding in the axial direction between the torque transmitting surface(s) of the mechanism (25) and the member(s) (14A, 16A) is eliminated when the mechanism (25) is moved relative to the surfaces of the members (14A, 16A) in the direction along the axis of the mechanism (25). This is achieved by dividing the torque transmitting surfaces of the mechanism (25) into several segments (30A, B, C, D), where during any instance a/the member(s) (14A, 16A) is/are in contact with at least one segment (30A, B, C, D) and at least one segment (30A, B, C, D) is not in contact with any member (14A, 16A). During the rotation of the mechanism (25) the segments (30A, B, C, D) alternately come in and out of contact with the members (14A, 16A).

Abstract: A cone to which one or several torque transmitting member(s) are attached as to form at least one torque transmitting arc on the surface of the cone. The torque transmitting member(s) will be used for torque transmission between at least one rotational energy conveying device and the cone. The torque transmitting member(s) are attached in a manner such that significant circumferential sliding that occurs between the torque transmitting surface(s) of the torque transmitting member(s) and the torque transmitting surface(s) of the rotational energy conveying device(s) when the pitch diameter of the torque transmitting member(s) is changed can be eliminated, such that wear and frictional energy losses are significantly reduced, and positive engagement devices, such as teeth, can be used for torque transmission between the torque transmitting member(s) and the rotational energy conveying device(s).