DEVICE TO PROVIDE SAFE OPERATION OF MOBILE HOIST Russian patent published in 2007 - IPC B66C23/00 B66C23/78 

FIELD: mechanical engineering; hoists and lifts.

SUBSTANCE: invention relates to mobile hoists and to safe operation of mobile hoists on outriggers. Proposed device contains base machine with frame, boom, press feet on outriggers, levers-rockers, four pairs of piston double-acting hydraulic cylinders with rear cover for welding which are rigidly interconnected to form rectangular support structure. Each pair of hydraulic cylinders is interconnected by pipeline from side of delivery spaces, and positive displacement hydraulic pump supplies all hydraulic cylinders of support structure. Liquid flow dividers-proportioners with floating piston arranged square to hydraulic cylinders with press foot of support structure are installed between parallel-mounted pairs of hydraulic cylinders. Each proportioner contains two throttling plates with holes of equal diameter which are symmetrically installed relative to inlet hole for liquid in proportioner which is provided with two outlet cylindrical ports of one size.

EFFECT: provision of leveling up of loads on press feet with outriggers.

2 dwg