Patent ID: 7699731
Filing Date: 2010-04-20
Classification: F16H

Abstract:
1. A transmission mechanism, comprising; a first rotating pulley; a first pulley motor coupled to said first rotating pulley; a transmission device coupled to said first rotating pulley; a second rotating pulley coupled to said first rotating pulley by said transmission device to rotate in response to rotation of said first rotating pulley, said first and second rotating pulleys and said transmission device having a stiffness; a tensioner system that varies said stiffness in a continuous range to a level that still allows said second rotating pulley to rotate in response to rotation of said first rotating pulley; a third rotating pulley coupled to said first and second pulleys by said transmission device; and, a third pulley motor coupled to said third rotating pulley, said first and third pulley motors being operated to vary said stiffness of said transmission device.