BOOM CRANE Russian patent published in 1995 - IPC

FIELD: lifting and transportation machinery. SUBSTANCE: turning column in boom crane is connected with boom arm by means of hinge joint and first power cylinder, and arm is connected with telescopic sections of boom by means of hinge joint and second power cylinder. Both power cylinders lie in plane passing through longitudinal axes of column and boom but at different sides from axes. First power cylinder is located along column, behind the column and second cylinder, along arm, in front of arm. Second cylinder is directly coupled with base of telescopic sections of boom. EFFECT: enlarged operating capabilities. 2 dwg