Overhead crane having bridge mounted for differential movement
US4657150A · kind A · utility
12Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1986 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Apr 21, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C19/007
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A trolley having an overhead movable bridge supporting a grappler device to lift and lower cargo containers. The bridge is movable along parallel tracks on a trolley. The bridge is capable of undergoing limited differential rotational motion with respect to the trolley and parallel tracks. The rotational mounting of the bridge permits the trolley wheels to maintain proper alignment with the beams while the grappler handles containers lying at an angle to the longitudinal axis of the crane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.