The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 2023
Filed:
Jun. 23, 2020
Applicant:
Liebherr-werk Ehingen Gmbh, Ehingen/Donau, DE;
Inventors:
Stefan Windbacher, Ulm, DE;
Ulrich Wiedemann, Ulm, DE;
Julian Wehrstedt, Ulm, DE;
Roland Bohnacker, Blaubeuren, DE;
Assignee:
Liebherr-Werk Ehingen GmbH, Ehingen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66C 23/76 (2006.01);
U.S. Cl.
CPC ...
B66C 23/76 (2013.01);
Abstract
The present invention relates to a crane comprising a main boom and a rearwardly directed derrick boom for bracing the main boom, wherein a suspended ballast is directly or indirectly attached to the derrick head via connecting means, wherein at least one luffable, rearwardly aligned ballast adjusting boom is provided, which acts on the connecting means and influences the suspended ballast radius by its luffing angle.