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:
Oct. 19, 1982
Filed:
Jul. 03, 1980
Franz Hilgers, Dusseldorf, DE;
Leo Gottwald KG, Duesseldorf-Reisholz, DE;
Abstract
A crane of the type having a slewing upper chassis 5 carrying a jib, the lowermost component of which is shown at 10, and an erection column 12 for raising the jib from a horizontal assembly position into an upright operating position, has a hydraulic cylinder 11 connected to the component 10 and a cable 13 connecting the component 10 to the column 12. The column 12 is raised from the lowered position shown to an upright position, in which subsequently a tackle 14 swings the column 12 rearwards and raises the jib to its upright operating position, by means of the cylinder 11. A better purchase can be obtained by the cylinder 11 acting on the component 10 than by a cylinder acting directly on the column 12 which is usual, and therefore a smaller cylinder can be used.