Crane with a luffing jib
US6206213A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 2000 |
| Grant date | Mar 27, 2001 |
| Priority date | — |
| Expiry date | Apr 27, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/708
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A crane, includes a luffing jib having individual telescoping jib members, and a locking device configured for linkage of jib members and movable between an engagement position in which the jib members are locked together and a release position in which a first one of the jib members can be moved in and out relative to a second one of the jib members. The locking device is supported in the first jib member and received in a receptacle of the second jib member. A shifter, movable in an axial direction, is provided to shift the locking device via a coupling device between the engagement and release positions, with the coupling device extending perpendicular to the axis and connected to the shifter. The coupling device has a coupling member movable in a radial direction to effect an interlocking engagement with the locking device, which is movable in a same axis as the coupling member, wherein the locking device forms together with the coupling member a coupling between the shifter and the first jib member, and wherein in a transition phase between release and engagement positions, a projecting portion of the coupling member enters in interlocking engagement with the locking device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.