In a constant horse-power type continuously variable transmission, a pressing force supply path using for a rotation-speed control is supplied to one of an input pulley d an output pulley, and an elastic force supply path using for an axial torque control to the then. However, the one pulley is applied...http://www.google.com/patents/US6997832?utm_source=gb-gplus-sharePatent US6997832 - Variable-speed control system for a transmission
