Patent ID: 7537087
Filing Date: 2009-05-26
Classification: A62B,B66B

Abstract:
1. A system comprising: a pulley attached to a non-portable structure; a closed loop of cable operatively installed around the pulley and being of sufficient length so as to reach when deployed outside of the structure, below the pulley to an area next to a base of the structure; a load attached to the loop; a traveler pulley attached to the loop; a traction winch located in the area next to the base, the traction winch being operable upon the loop to raise the attached load from the area next to the base and to lower the attached load back to the area next to the base; a deflector pulley coupled to the attached load, to move with the attached load as the attached load is lowered and raised through operation of the traction winch, wherein the loop extends down from the pulley ( a backbone to which the load is attached so as to pivot relative to the backbone, the deflector pulley being rigidly attached to the backbone.