Patent ID: 6062405
Filing Date: 2000-05-16
Classification: B66C

Abstract:
A mobile crane having an upper works rotatably mounted on a lower works and a boom pivotally mounted on the upper works comprising:a) a mast pivotally connected to the upper works at or near the connection of the boom to the upper works;b) a hydraulic cylinder for controlling the angle of the boom, said hydraulic cylinder being pivotally connected to the upper works;c) said connection of the mast to the upper works being separate from and at an elevation below the elevation of the connection of the hydraulic cylinder to the upper works;d) said mast being pivotally connected to said hydraulic cylinder; ande) said boom being pendently connected to either said mast or said hydraulic cylinder at a location near the connection between the mast and the hydraulic cylinder, wherein said hydraulic cylinder is in tension and said mastisin compression during normal lifting operations of the crane.