Device for use in removal of stumps
US4048733A · kind A · utility
1Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1976 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Sep 30, 1996 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G23/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
At the end of a vehicle-carried crane arm a vertically extending frame is supported which at its lower end carries a movable split head with spreadable chopping blades. A ram raisable to the top of the frame drives, when released, by the impact on the split head the blades into the center of a tree stump that is to be extracted from the earth. Then the blades are spread to break the stump into separate portions which are easily individually removable in a direction substantially following the extension of the roots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.