Tower crane with collapsible counter-jib
US7093730B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2003 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Jan 29, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/348
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The auto-erection tower crane possesses a tie-free jib, mounted at the summit of a mast and extended, toward the rear of its connection point to the summit of the mast, by a counter-jib, the end of which is connected, by a rear tie, to a bogie truck element of the crane. For the transport of the crane, the counter-jib is folded up in a vertical plane on the rear part of the jib. The unfolding and folding-up of the counter-jib are realized automatically, simultaneously with the automatic erection or dismantling of the crane. The structure of the counter-jib also allows adjustment of the working position, horizontal or inclined, of the jib.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.