Seed drill apparatus
US4324347A · kind A · utility
Inventor
Key dates
| Filing date | Aug 6, 1980 |
| Grant date | Apr 13, 1982 |
| Priority date | — |
| Expiry date | Aug 6, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01C7/20
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A speed drill apparatus has a seed storage box SB with seed inlet manifold 2 to convey seeds to a rotatable collector wheel 5 having a number of peripheral seed receiving cavities 6. The seeds are ejected singly, assisted by a blade edge 11 running in a groove 5a joining the centers of the cavities, through an aperture B in casing 1 to fall into a groove 8 around the periphery of a distributor wheel 7. The groove 8 is subdivided by stops 9 into arcuate sectors each of which receives a seed. A retardation device 12 catches a seed in the groove 8 and holds same until carried on by a stop 9. The seed falls to the ground through outlet 13. The wheel 7 has a peripheral speed equal to the linear speed of motion over the ground and wheel 5 rotates more slowly with a reduction dependent on the ratio between the number of cavities 6 and number of stops 9. The retardation device 12 ensures accuracy of spacing by providing for discharge of each seed only when in abutment with a stop 9.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.