Mobile lift crane with variable position counterweight
US8511489B2 · kind B2 · utility
2Cited by
53References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2011 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Nov 25, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66C23/76
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A mobile lift crane includes a carbody; a rotating bed; a boom; a moveable counterweight unit; at least one linear actuation device; and at least one arm pivotally connected at a first end to the rotating bed and at a second end to the linear actuation device. The arm and linear actuation device are connected between the rotating bed and the counterweight unit such that extension and retraction of the linear actuation device changes the position of the counterweight unit compared to the rotating bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.