Patent ID: 8770346
Filing Date: 2014-07-08
Classification: A62B,B66B

Abstract:
1. A lifting system for raising a suspended load to an upper level of a tall structure, comprising: a top pulley attached to a structure; a closed loop of cable installed around the top pulley; a load attached to a near section of the loop, wherein a far section of the loop is positioned farther from a side of the structure than the near section; a traction winch around which the loop is installed, the traction winch being powered to rotate in one direction to pull in the far section of the loop and thereby raise the attached load, and to rotate under braking in an opposite direction to let out the far section of the loop and thereby lower the attached load; and a moveable pulley within the loop, the moveable pulley to be moved relative to the traction winch and the top pulley to thereby (i) increase tension in the loop so that the attached load moves away from a side of the structure and (ii) decrease tension in the loop so that the attached load moves towards the side of the structure.