Two-boom crawler crane
US4946051A · kind A · utility
11Cited by
4References
5Claims
0Family size
Inventor
Key dates
| Filing date | Apr 5, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Apr 5, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/64
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A crawler crane made up of a crane frame and body on tracks, a telescoping boom projecting from the body, a fixed-length A-frame boom with rotatable arms, a mechanism for lifting the telescoping boom and a device for extending the telescoping boom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.