PNEUMATIC SEEDING UNIT Russian patent published in 2001 - IPC

FIELD: agricultural engineering. SUBSTANCE: seeding unit has casing with seed box, cover with vacuumizer, seeding disk with suction openings. Replaceable insert fixed on casing is provided with channel arranged in symmetry with respect to seeding disk suction openings and directed toward them so as to define passage for single seed. Insert is fixed in casing by pin, which is inserted through holes in casing and insert. Depth and width of insert channel are equal to 1.2 of seed diameter. Seeding unit provides precise seed drilling. Replaceable insert allows seeds of different fractions to be drilled. Besides, seeding unit may be readily and quickly adjusted without disassembling. EFFECT: simplified construction and wider operational capabilities. 3 cl, 3 dwg