Patent ID: 11884520
Assignee: NATIONAL OILWELL VARCO, L.P.
Field: Handling (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 9:
10. A tower crane for assembling a wind turbine, comprising:
a boom assembly comprising a boom and a hoisting block coupled to the boom;
an extendable tower assembly comprising a plurality of tower sections; and
a transport assembly comprising a central support frame coupled to the tower assembly, a plurality of independently self-propelled transporters coupled to the central support frame and configured to transport the tower crane, a plurality of diagonal braces extending diagonally between the central support frame and the plurality of transporters, and a control system comprising a processor and a memory containing instructions executable by the processor to selectably extend and retract the plurality of diagonal braces to maintain a predetermined inclination of a central axis of the tower crane as the tower crane is transported by the plurality of transporters.