PNEUMATIC SEEDING APPARATUS Russian patent published in 2018 - IPC A01C7/04 

FIELD: agriculture; engineering.

SUBSTANCE: pneumatic sowing apparatus includes a housing, a seed and a vacuum chamber, a drive shaft, a sowing disc with suction holes of an oblong shape, a gasket with a figure-shaped cutout, a seed turner and a flat ejector of “extra” seeds. Said suction holes of the sowing disc are designed in such a way that their long axes are oriented at an angle of 12…15° to the radii of the sowing disc. And the thickness of the first three or four (in the direction of the suction holes) of the saw-tooth protrusions of the “extra” seed ejector is stepwise changed so that the thickness h of the input edge (first “stage”) of the first protrusion is 1…2 mm. Then, the thickness of each “step” is increased by the value of (H-h)/z, where H is the total thickness of the shank of the “extra” seed ejector, mm; z is the number of “steps” on the sawtooth projections of the “extra” seed ejector, pcs.

EFFECT: invention will improve the quality of dosing of seeds.

1 cl, 7 dwg