TILLAGE SEEDER UNIT Russian patent published in 2012 - IPC A01B49/06 A01B13/16 

FIELD: agriculture.

SUBSTANCE: unit comprises a frame with self-aligning front wheel and support-press wheels, a hydraulic system. The unit has two hoppers for seeds and mineral fertilisers, grain and fertiliser sowing machines, seed pipes, fertiliser pipes, hoe openers, a screw straw guide, a straw huddler. In front of the openers on the frame stepped discs are installed, bearing the rigidly fixed blades. Cutting edge of each blade is made in the form of involute with a constant evolute radius of R₁ = r₁, where r₁ is an outer radius of the stepped disc. The center of the evolute coincides with the center of the disc O and the evolute has the starting point A, a point of tangency of involute with evolute.

EFFECT: constructive implementation enables to increase crop yields by providing for one pass of the unit of cutting water absorbing slits to form the bottom of the slot of a comb shape retaining moisture, filling them with chopped aftermath residues, sowing and past-sowing soil compacting.

2 cl, 7 dwg