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:
May. 08, 2007
Filed:
Sep. 20, 2004
Applicants:
Hans-dieter Willim, Ulm, DE;
Uwe Frommelt, Ehingen, DE;
Inventors:
Hans-Dieter Willim, Ulm, DE;
Uwe Frommelt, Ehingen, DE;
Assignee:
Liebherr-Werk Ehingen GmbH, Ehingen/Donau, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66C 23/34 (2006.01);
U.S. Cl.
CPC ...
Abstract
The within invention concerns a crane with a superstructure that rotates on a vertical axle, a boom coupled to the superstructure in such manner as to luff on a horizontal axle, luffing equipment for luffing the boom, and an operating ballast that counteracts the moment of the boom. According to the invention, the crane is characterized by an auxiliary erection frame that can be attached to the superstructure and/or the operating ballast in such manner as to project backward and can be connected with an auxiliary erection ballast for the erection of the boom.