ARRANGEMENTS FOR FREEDOM AND LABOUR FOR EXTERNAL TRANSPORTS

摘要

This invention consists of a turning and locking device for revolving booms on gantry cranes, where the turning device consists of a link system connected to a control device, e.g. a hydraulic cylinder, and where the locking device is a hydraulic cylinder with a piston rod that is directed into a hole in the boom when this is in its turned out position. IMAGE