Patent · US Active

Rotary tower crane

US11459217B2 · kind B2 · utility

0Cited by

3References

17Claims

0Family size

Assignee

LIEBHERR-WERK BIBERACH GMBH · DE

Inventor

Thomas Herse · Biberach, DE

Key dates

Filing date	Aug 31, 2018
Grant date	Oct 4, 2022
Priority date	—
Expiry date	Aug 31, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB66C23/82
WIPO fieldHandling
WIPO sectorMechanical engineering

Abstract

A rotary tower crane with a tower, which carries a jib and a counterjib, with a jib stay being guided from a tower top to the jib and to the counterjib. The jib stay tensions only an inner jib portion, the length of which is less than 40% of the total length of the jib, and an outer portion, the length of which is more than 60% of the total length of the jib, forms an untensioned bending beam jib which includes at least one jib piece which tapers in height and which is adjoined on the inner side by at least one jib part of greater height and on the outer side by a jib piece of smaller height.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.