Boom extension for gantry cranes
US5265741A · kind A · utility
9Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Aug 11, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/66
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for providing a boom extension for retractable booms of gantry cranes which does not require lowering the boom during attachment of the extension, or increasing the lift capacity of the boom hoist machinery, nor does the boom extension add bending moment to the retractable boom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.