Patent ID: 6443687
Filing Date: 2002-09-03
Classification: E02F

Abstract:
An excavator-hoist, comprising:a chassis; an operator's cab and a drive assembly supported on the chassis; a boom secured at one end thereof to a front end side of the drive assembly and having an opposite free end; a working tool supported at the free end of the boom; a first pair of projecting arms connected to the front end side of the chassis and having each a free end portion offset in a vertical plane, upwardly relative to a remaining portion of a respective arm; a second pair of projecting arms connected to an opposite, rear end side of the chassis; first hydraulically operated piston-cylinder units for pivoting the arms of the first pair of arms in horizontal and vertical planes, with the piston-cylinder units, which pivots the arms in respective vertical planes, having one of their respective ends attached to the respective arms above pivot axes of the respective arms, and having another of their respective ends attached in respective regions of bottoms of the respective arms; second hydraulically-operated piston-cylinder units having first ends thereof secured to the chassis and having second ends thereof secured to respective arms of the second pair of arms for pivoting the arms in horizontal and vertical planes; a pair of front wheels supported on and carried by the upwardly offset free end portions of the arms of the first pair of arms; and a pair of rear wheels supported on free end portions of the arms of the second pair of arms and having a diameter approximately equal to a diameter of the front wheels.