Crane with adjustable suspended ballast

US11577941B2 · kind B2 · utility

Assignee

• LIEBHERR-WERK EHINGEN GMBH · DE

Inventors

• Stefan Windbacher · Ulm, DE
• Ulrich Wiedemann · Munich, DE
• Julian Wehrstedt · Ulm, DE
• Roland Bohnacker · Blaubeuren, DE

Key dates

• Filing date: Jun 23, 2020
• Grant date: Feb 14, 2023
• Expiry date: Jul 21, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66C23/60
• WIPO field: Handling
• WIPO sector: Mechanical engineering

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.