Crane with gantry backhitch and boom hoist assembly removable as a unit
US3977530A · kind A · utility
15Cited by
7References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1974 |
| Grant date | Aug 31, 1976 |
| Priority date | — |
| Expiry date | Jun 13, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/36
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A mobile crane with rotating bed, mast, gantry and gantry backhitch is arranged for disassembly and ease of transport without unreeving the boom hoist rigging by collapsing the backhitch, folding the gantry back onto the backhitch, pinning together the backhitch, gantry and boom hoist assembly -- which includes the boom hoist drum and motor, and releasing the gantry, backhitch and boom hoist assembly from the rotating bed. A bracket is fixed to the gantry to provide an anchoring point for the equalizer assembly normally secured to the boom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.