Patent ID: 6382437
Filing Date: 2002-05-07
Classification: B66C

Abstract:
A crane system, comprising:a body frame having an upper rectangular surface and legs extending downward at corners thereof; a hoisting accessory having four connection points thereon, two connection points provided at both ends of the hosting accessory; a plurality of sheaves attached near corners of the upper surface of the body frame, one sheave provided near each corner; a first drum for taking up and paying out wire rope attached at a first corner of the upper surface of the body frame, between at least one sheave and said first corner; a second drum for taking up and paying out wire rope attached parallel to said first drum at a second corner of the upper surface of the body frame, between at least one sheave and said second corner; a first pair of wire ropes each attached at one end to a corresponding connection point on said hoisting accessory, one wire rope of said first pair being connected at its other end directly to said first drum, the other wire rope connected at its other end to said first drum via one of said sheaves; and a second pair of wire ropes each attached at one end to a corresponding connection point on said hoisting accessory, one wire rope of said second pair being connected at its other end directly to said second drum, the other wire rope connected at its other end to said second drum via another of said sheaves.