PNEUMATIC SEEDING-MACHINE WITH CENTRAL METERING SYSTEM Russian patent published in 2012 - IPC A01C7/04 

FIELD: agriculture.

SUBSTANCE: seeding-machine with the central metering system includes a central hopper with a metering unit, pneumatically connected through a seed distributor with openers. The openers are mounted on the frame and include a rack, a cultivator tooth, a seed-layer with a vertical channel, and a ridge-sealer. The ridge-sealer is made of two parts, the first of which is fixed on the bottom on the cultivator tooth, forming with it a triangular wedge. The second part of the ridge-sealer is made in the form of a plate placed behind the seed-layers of the openers on a flexible connection. Outlet of the vertical channel of the seed-layer is directed to the angle of the jaw opening of the cultivator tooth and is located on its bisector. In the corner of the jaw opening of the cultivator tooth an arc-shaped reflector of seeds with a projection in the center and at least two protrusions on its sides is mounted.

EFFECT: invention enables to improve the uniformity of distribution of seeds on the surface of the field and the accuracy of the depth of seeding-down.

5 cl, 5 dwg