WHEELED LOAD LIFTING CRANE Russian patent published in 1997 - IPC

FIELD: mechanical engineering; material handling facilities. SUBSTANCE: in case of slipping, truck crane is placed on outriggers and then frame of wheeled chassis is displaced relative to crane frame by hydraulic cylinders through hydraulic cylinder rod extension value. Then outriggers are retracted, crane is placed with wheels on ground, and frame of crane is returned into initial position. Thus "walking" over section of road difficult to ride is done. If section of road cannot be covered by one "step", operation is repeated. EFFECT: increased cross-country capability of wheeled crane. 3 dwg