Device for simultaneously unfolding or folding crane jib tip elements
US6276541A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 2000 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Feb 11, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/26
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The device applies to a tower crane jib comprising a succession of elements articulated one to the next, comprising at least two relatively long main elements, and two relatively short tip elements. Connecting members, particularly in the form of a link-rod system, connect the front part of the last main jib element, the intermediate jib tip element and the end jib tip element in such a way that the two tip elements can be unfolded or folded simultaneously, in a vertical plane, relative to the remaining part of the jib. This device is actuated using the crane's lifting cable. In the folded position, at least one of the tip elements runs in a direction approximately perpendicular to the main elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.