A mechanical seed meter

A - Human Necessities – 01 – C

Patent

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Details

A01C 7/04 (2006.01) A01C 7/16 (2006.01) A01C 7/20 (2006.01)

Patent

CA 2215547

A mechanical seed meter having a stationary housing and a rotatable bowl. The stationary housing is provided with a first axial wall, an outer radial wall and a flexible inner radial wall. The bowl is provided with seed receiving cells that form a second axial wall for trapping singled seeds in the seed trapping area. A flexible and resilient flap maintains the seed in the seed receiving cells. An axially extending brush removes excess seeds from the seed receiving cells as they pass through the seed puddle before entering the seed trapping area. The seed slides along the radial outer wall by centrifugal force until it enters the outlet area from which the outer radial wall becomes part of the outlet and the metered seed is deposited through the outlet to a seed tube. Jammed seed, that is seed trapped in the seedreceiving cells, are provided with a downward force by a bump located in the outlet and an upward force by a rotatable wheel located downstream from the outlet.

La présente invention vise un compteur mécanique de graines de semence, comportant un tambour fixe et un bol rotatif. Le tambour comporte une première paroi axiale, une paroi externe radiale et une paroi interne radiale flexible. Le bol comporte des cellules destinées à recevoir les graines de semence et formant la deuxième paroi axiale servant à retenir les graines individuelles dans la zone de rétention. Un rabat flexible et résilient maintient les graines de semence à l'intérieur des cellules de rétention. Une brosse à montage axial retire les graines de semence retenues en excédent dans les cellules avant leur arrivée dans la zone de rétention. Les graines de semence glissent le long de la paroi radiale externe sous l'effet de la force centrifuge jusqu'à ce qu'elles atteignent le point de sortie de la paroi externe où, après comptage, elle sont introduites dans un tube. Les semences coincées à l'intérieur des cellules sont délogées par l'interaction d'un bossage et d'une roue rotative située en aval du point de sortie.

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