Seed drill with disk-type furrow openers
US4422392A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1982 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | May 26, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P60/20
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A seed drill has rotatably mounted opener discs disposed in an acute angle with respect to the direction of travel and mounted on supports. A skid is mounted to each support at the outside surface of the disk at an angle with respect to the direction of travel. Each skid includes a trailing portion configured to have a sliding surface disposed above the depth of penetration of the disk in the ground and a leading portion bent upwardly in the direction of travel and having a recess in the side thereof facing the disk and which extends beyond the forwardmost portion of the disk in the direction of travel. Each skid is releasably connected to the support for pivotal movement of the trailing portion towards and away from the ground by a lever pivotable with the skid, a spring connected between the lever arm and the support for biasing the trailing portion of the skid towards the ground and an adjustable stop mounted on the support and engageable with the lever arm to limit the free pivotal movement of the skid in the upward direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.