Patent ID: 11897736
Assignee: TADANO FAUN GMBH
Field: Handling (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 7:
8. A locking device for a telescopic boom, comprising:
a hydraulic actuator for generating an actuating force, said hydraulic actuator including:
a double chamber cylinder formed with a first cylinder chamber and a second cylinder chamber oriented opposite said first cylinder chamber;
a first piston rod associated with said first cylinder chamber and a second piston rod associated with said second cylinder chamber;
a first restoring spring configured for restoring said first piston rod to a main position thereof wherein said first piston rod is in a pushed-in position in said first cylinder chamber; and
a second restoring spring configured for restoring said second piston rod into a main position thereof wherein said second piston rod is in an extended position;

at least one driver configured to be reversibly coupled, during a telescoping movement of the telescopic boom, to a locking bolt that is secured at a boom extension segment of the telescopic boom, and to be moved by the actuating force for adjusting the locking bolt between a locking position and a release position;
at least one driver bolt configured to be reversibly moved by the actuating force between a carry-along position, gripping an inner boom extension segment, and an empty running position in which no boom extension segment is gripped; and
a slotted actuating link configured for a joint movement of the locking bolt and said driver bolt, said slotted actuating link, in an installation state as intended, having a movement plane oriented perpendicular to a telescoping direction of the telescopic boom.