Selected pin seed meter

A - Human Necessities – 01 – C

Patent

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Details

A01C 7/12 (2006.01) A01C 7/04 (2006.01)

Patent

CA 2134501

The present invention is directed to a seed meter for corn. The seed meter comprises a stationary casing with two rotatably mounted discs. The casing is provided with a seed receiving zone in communication with a inlet, and a seed discharge zone in communication with an outlet. The casing is also provided with a stationary camming surface. The first disc is provided with a plurality of spring biassed selector pins. Each pin has an engagement surface and a cam follower surface. The cam follower surface engaging the camming surface. The second disc which rotates with and is parallel to the first disc is provided with a plurality of seed cells corresponding to the selector pins. A flexible and resilient membrane covers the seed cells. In operation, the discs are continuously rotated through the seed receiving and discharge zones. As a selector pin is driven towards the corresponding seed cell by the camming surface, the pin traps a single seed in the membrane covered seed cell. The seed is released when the pin is rotated into the discharge zone.

La présente invention vise un trieur de graines pour le maïs. Le trieur de graines comprend un carter stationnaire et deux disques rotatifs. Le carter comprend une section conçue pour recevoir les graines qui communique avec l'entrée, et une section de refoulement des graines qui débouche sur la sortie. Le carter est aussi pourvu d'une rampe de commande stationnaire. Le premier disque est pourvu de plusieurs ergots de triage soumis à l'action d'un ressort. Chaque ergot possède une surface de prise et une surface suiveuse de came. La surface suiveuse de came engage la rampe. Le deuxième disque, qui est parallèle au premier et qui tourne en même temps que celui-ci, est pourvu de plusieurs alvéoles à graines qui correspondent aux ergots de triage. Une membrane flexible et élastique recouvre les alvéoles à graines. En service, les disques tournent continuellement à travers les sections de réception et de refoulement des graines. Lorsqu'un ergot de triage est entraîné vers l'alvéole à graines correspondante par la rampe, il capture une seule graine et la dépose dans l'alvéole recouverte de la membrane. La graine est libérée quand l'ergot arrive à la hauteur de la section de refoulement.

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