Method and device for mounting the masthead of tower cranes
US6422408B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Jan 21, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/26
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention relates to the mounting of the revolving part of a tower crane, at the top of the mast. A first assembly, formed by the counterjib (8), its tie rod (19) and a rear part (22) of the jib bearer (5), made in two separable parts, is pre-built on the ground, then lifted up and assembled by pinning (at 18) on the revolving pivot or the mast-cab (10) and is held temporarily in place by retaining link rods (48). Another assembly, formed by the jib (6), its tie rods (13, 14) and the front part (21) of the jib bearer, is also pre-built on the ground, then lifted up and assembled by pinning (at 77) on the revolving pivot or the mast-cab (10). The respective tops (28, 47) of the front part (21) and of the rear part (22) of the jib bearer (5) are then joined together by temporary pinning along an axis (78), followed by definitive pinning along an axis (79).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.