Patent ID: 6708750
Filing Date: 2004-03-23
Classification: E06B

Abstract:
An apparatus for moving a member, comprised of:an electric motor; a drive shaft operably connected to the motor; a torque sensing mechanism including one or more driver members operably connected to the drive shaft, and one or more driven members, wherein the driver and driven members are rotatably engaged and changes in torque cause changes in the relative engaged positions of the driver and driven members; one or more hollow shafts operably connected to said one or more driven members; one or more sliding shafts engaged with the one or more hollow shafts such that rotation of the hollow shaft causes rotation of the sliding shaft and also causes said sliding shaft to slide along said hollow shaft; one or more lift cords attached to the one or more sliding shafts such that rotation of the sliding shaft causes the lift cord to wind around the sliding shaft; and one or more members capable of movement and configured with the lift cord such that movement of the lift cord results in movement of the member.