Belt for continuously variable transmission

A transmission having a reduced size and a controllable transmission ratio for increased efficiency, the transmission comprising:

• an outer conical split pulley having a first half-pulley and a second half-pulley;
• an inner conical split pulley having a first half-pulley and a second half-pulley;
• a belt, wherein the belt has first and second outward-facing contact surfaces and first and second inward-facing contact surfaces, wherein the belt is in contact with the first and second half-pulleys of the outer conical split pulley via the first and second outward-facing contact surfaces, respectively, and wherein the belt is in contact with the first and second half-pulleys of the inner conical split pulley via the first and second inward-facing contact surfaces, respectively;
• a first input member;
• and
• a first output member coupled to the first input member via the inner conical split pulley such that torque can be transmitted between the first input member and the first output member.

A variable transmission comprising:

• an input member that rotates about a central axis;
• an inner pulley that rotates about an inner pulley axis, wherein an eccentricity of the rotation of the inner pulley, relative to the central axis, is adjustable to control a transmission ratio of the transmission;
• an outer conical split pulley having a first half-pulley and a second half-pulley;
• a belt, wherein the belt is in contact with the inner pulley, and wherein the belt is in contact with the first and second half pulleys of the outer conical split pulley via respective first and second contact surfaces of the belt;
• and
• an output member, wherein the output member is coupled to the inner pulley such that precession of the inner pulley axis around the central axis results in rotation of the output member.