ANORDNING FOR KONTROLL AV RORELSER KRING ETT ELLER FLERA SVENGNINGSCENTRA VID ETT HANTERINGSDON

摘要

A gripping device comprising two pivotally mounted gripping claws is operated by a double acting hydraulic cylinder. The entire gripping device is pivotally mounted from a crane or the like by means of a universal joint. A member is provided which is operated on by a pressure fluid in the double acting hydraulic cylinder and which serves to temporarily lock the universal joint against pivotal movement to provide a secure and firm connection between the gripping claws and the crane or the like on which the claws are supported. In one embodiment of the invention a rod engages with a ball shaped head to prevent pivotal movement of the universal joint, and in a second embodiment bellows are inflated by hydraulic fluid to prevent movement of a pivotal joint.