Luffing jib crane with a device for locking the jib in a raised configuration
US10836616B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | May 28, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C2700/0392
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A crane includes a luffing jib and a lifting cylinder having a cylinder body and a movable rod hinged on the jib to displace the jib in lifting motion and in lowering motion, and a locking device adapted to cooperate with the lifting cylinder to mechanically lock the rod in a deployed holding position and block the jib in a raised holding configuration. The crane further includes a spacer hinged on the jib and supporting a stop, the spacer pivotable between a release position in which the spacer is shifted, allowing the movable rod to be freely displaced, and a locking position in which the spacer is folded so that the stop is capable of abutting on a bearing surface in a ball jointed connection with the cylinder body, to fixedly hold the movable rod in the deployed holding position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.