Agricultural implement with down-force control
US6044916A · kind A · utility
36Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1997 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Jul 10, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01C5/062
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Down-force control is provided by a top-link, which presses down the rear end of a tool-bar carrying multiple rows of seeder tools. The height of the tool bar is set front and rear during operation. The top-link includes a hydraulic ram. The ram is supplied with pressure from a pressure-reducing-relieving valve, whereby the downward-force on the rear of the tool-bar remains constant during operation. The tool bar has side wings which are pressed down by a pressure that is regulated by the same valve. The system allows the seeder to maintain constant implantation depth, even over uneven ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.