Patent ID: 11970372
Assignee: LIEBHERR-WERK NENZING GMBH
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 15:
16. The method according to claim 15, wherein, during the raising and/or setting-down of the derrick boom, the assistance apparatus pretensions the derrick boom between a support strand of the main boom and a support strand of the derrick boom, and the derrick boom is moved a main-boom winch and/or a derrick-boom winch is actuated by the assistance apparatus on the basis of a support-strand force for the derrick boom and/or a support-strand force for the main boom, to keep the support strand of the main boom and/or the support strand of the derrick boom at a predetermined tension value, such that the support strand is wound up onto the main-boom winch and/or the derrick-boom winch.