Demountable gantry, boom hoist and counterweight
US4081081A · kind A · utility
41Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1976 |
| Grant date | Mar 28, 1978 |
| Priority date | — |
| Expiry date | Oct 26, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/36
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The back hitch assembly for a lift crane includes hydraulic cylinders for raising the pivotally mounted gantry members and masts. Counterweight lift links are connected between the gantry and the counterweight and the back hitch cylinders may be used to mount and demount the counterweight and the boom hoist winch. The masts, gantry members and back hitch cylinders may be folded back over the bed of the crane for low profile transport or they may be demounted to further reduce weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.