Patent ID: 7213852

Claim:
A spreader system without an electric cable, comprising: a spreader for lifting a container; a headblock disposed on the spreader; and a plurality of pulley sets disposed on the headblock; wherein: each pulley of the pulley sets is coupled with a geared ring; a plurality of gears are fixed on the headblock; a tapered coupling is fixed on a gear shaft and is connected to a planetary transmission, the other end of the planetary transmission is connected to a bi-directional piston pump through a flange, the bi-directional piston pump further connected to a hydraulic accumulating power station through a hydraulic circuit, the hydraulic accumulating power station having a hydraulic accumulator, a pipeline, an oil tank, an electric generator, a battery connected to and charged by the electric generator, and an hydraulic motor connected to the electric generator and controlled by a magnetic valve; and on the spreader there is one of a remote control transmitter and a remote control receiver for transmitting or receiving signals to or from one of a remote control receiver and a remote control transmitter in a cab of a container crane; wherein: while crane hoists and/or trolley of the container crane move, a wire rope rotates the pulley sets which drives the bi-directional piston pump through the hydraulic accumulating power station, thereby delivering energy from the bi-directional piston pump to the hydraulic accumulating power station and accumulatively forming power on the spreader to drive the spreader by remote control without the electric cable.