Movable ring supported lift crane
US4387813A · kind A · utility
3Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1981 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | Sep 8, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/84
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A front and rear pair of crawler assemblies are provided for supporting the ring of a ring supported crane so the crane can travel under load. The front pair of crawler assemblies which form an independent transporter mechanism are selectively and reversely powered to facilitate forward and reverse as well as turning movement. The rear pair of crawler assemblies are disposed in idling arrangement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.