PNEUMATIC SEEDING UNIT Russian patent published in 2003 - IPC

FIELD: agricultural engineering. SUBSTANCE: seeding unit has casing with two seed chambers and seeding disk fixed on drive shaft. Seeding disk is mounted in slot formed in casing so as to define slit-type dosing members with each of end surfaces. Slot is communicated with atmosphere at casing part extending from inlet windows of casing to intake openings. Disk end surfaces at both sides of disk perimeter have friction coefficient with respect to grains of at least 0.65 and radial size exceeding maximal size of grains. Friction coefficient of grains against casing does not exceed 0.3. Dosing slits are equipped with layers for regulating their section. EFFECT: increased efficiency, improved uniform distribution of grains and provision for preventing dosing members from plugging. 2 cl, 2 dwg