Patent ID: 11912542
Assignee: LIEBHERR-WERK NENZING GMBH
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 20:
21. A lifting device comprising:
a superstructure;
a main boom that starts from the superstructure;
a luffing boom that starts from an end of the main boom remote from the superstructure;
a winch arrangement at the superstructure and/or at the main boom; and
a tilting moment detection unit comprising a control unit having instructions stored therein for determining a tilting moment acting on the lifting device by a position of the main boom and the luffing boom; and
an apparatus for assisting or for fully automatically carrying out an erecting and/or placing down procedure comprising a controller having instructions stored therein for carrying out an erecting and/or placing down procedure of a boom system, the boom system comprising the main boom and the luffing boom, the erecting procedure of the boom system comprising movement of the main boom and the luffing boom away from a placed down position to an erected position where, in the placed down position, the main boom, the end of the main boom, and the luffing boom extend horizontally away from the superstructure and rest on a ground surface, and where, in the erected position, the end of the main boom and the luffing boom extend vertically above and do not rest on the ground surface, and the placing down procedure of the boom system comprising movement of the main boom and the luffing boom from the erected position to the placed down position,
wherein
the apparatus for assisting or for fully automatically carrying out an erecting and/or placing down procedure is configured to carry out steps for the erecting and/or placing down procedure of the boom system in dependence on the tilting moment detected by the tilting moment detection unit, and
the apparatus for assisting or for fully automatically carrying out the erecting and/or placing down procedure is furthermore configured only to carry out the steps for the erecting and/or placing down procedure of the boom system in dependence on the tilting moment detected by the tilting moment detection unit so that rigid boom positions do not have to be reached in the sequence of steps for the erecting and/or placing down procedure of the boom system.