Mobile crane having telescoping outriggers and power operated screw means for same
US4394912A · kind A · utility
14Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 7, 1980 |
| Grant date | Jul 26, 1983 |
| Priority date | — |
| Expiry date | Nov 7, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/78
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A mobile crane having an extensible boom which is swingable about both a vertical and horizontal axis and having telescoping outriggers that extend transversely of the main frame of the crane and which outriggers are also pivotally mounted about a vertical axis for swinging between stowed position along the main frame and an extending crane operative position. Power operated extension means are provided for telescopingly adjusting the outriggers and includes a reversible hydraulic motor for rotating a threaded shaft. The telescoping outrigger includes a hollow box in which a hollow beam is telescopingly mounted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.