Seed disc for an air planter
US4047638A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1976 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | Apr 26, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S111/927
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A rotating disc has perforated seed pockets which pick up individual kernels of seed from an air pressurized cavity of a planter housing. Air flowing through the perforated pockets creates a pressure differential which moves a kernel into each pocket as the pocket moves on a circular path upwardly through the cavity. The pocket then moves into axially confronting relation with a flat sealing surface. The flat sealing surface holds the seed in the pocket as the disc rotates further to bring the pocket to the lower part of the housing where the seed falls by gravity into the soil. Each of the circumferentially spaced pockets has an opening in its bottom which is large enough to permit air flow therethrough but smaller than the seed kernels to be planted. The pockets are clam shell shaped with the more gentle slope on the side of the pocket toward the direction of rotation of the disc during planting. The opposite side of the pocket has a steep slope whereby the seed in the pocket is mechanically assisted in its assent from the seed cavity. The seed disc for corn includes a camming groove extending from each pocket which cams corn kernels radially outwardly toward the pocket as it pas…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.