LIFTING SYSTEMS

摘要

Various lifting systems are described that use one or more of the following features. A method for setting an adjustable height upper pulley on a tall structure; load transfer from a suspended load to a tall structure; fan-based stabilizer; stabilizer or horizontal load position control mechanism using a closed loop of cable and taction winch for a crane application; crane-based lifting system that uses a closed loop of lifting cable looped around a traction winch; and a stabilizer or horizontal load position control mechanism that does not need a closed loop of cable. Other embodiments are also described and claims. Other embodiments are also described and claimed.

主权项

1. A crane-based lifting system comprising:
a crane boom or ladder; an upper pulley attached to the crane boom or ladder; a traction winch; a cable that is looped around the upper pulley d the traction winch; a load attached to tile cable; a loop closure mechanism coupled to the cable to form a closed loop of cable; and a stabilizer mechanism,
wherein the traction winch is to operate in one direction to rotate the closed loop clockwise and raise the attached load, and in another direction to rotate the closed loop counterclockwise and lower the attached load,and wherein the stabilizer mechanism is separately controllable from the traction winch to urge the attached load sideways.