Luffing jib crane with a device for locking the jib in a raised configuration
US10836615B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | May 31, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C2700/0392
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A crane having a luffing jib and a lifting cylinder includes a cylinder body and a movable rod hinged on the jib to raise and lower the jib, 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, and further including a spacer hinged on the jib and supporting an abutment, the spacer configured for pivoting between a release position wherein the spacer is offset, authorizing the movable rod to be displaced freely, and a locking position wherein the spacer is folded so that the abutment is able to bear on the cylinder body to fixedly maintain the movable rod in the deployed holding position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.