Patent ID: 11858788
Assignee: TADANO DEMAG GMBH
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A telescoping jib of a mobile crane comprising:
an outermost single basic box in which a plurality of inner boxes are telescopically inserted one inside the other, wherein the plurality of inner boxes can each be extended from a retraction position to an extension position and that can be locked and unlocked together in the respective retraction position or various extension positions via bolting holes and associated locking bolts;
wherein the bolting holes are arranged in the single basic box and the inner boxes, and wherein in the retraction position of the single basic box and inner boxes the bolting holes of the single basic box and the inner boxes for all of the various extension positions are aligned with one another, wherein in the extension position the locking bolts can be unlocked from the outside through the bolting holes in an emergency, and wherein in the extension position a front end of the locking bolts is accessible from the outside through the bolting holes of the inner boxes and the basic box outwardly adjoining the inner box of the plurality of the inner boxes carrying the locking bolt.