COMPLEX LAYER-BY-LAYER SOIL TILLAGE TOOL Russian patent published in 2000 - IPC

FIELD: agriculture. SUBSTANCE: tillage tool has frame, disk batteries successively mounted on frame, wide flat knives and left-hand and right-hand soil rippers arranged in symmetry at both sides of tillage tool axis. Flat knives cutting edges are positioned at the level lower than disk cutting edges by value corresponding to thickness of soil layer to be tilled. Cutting edges of soil rippers are positioned at the level lower than flat knife cutting edges. Flat knives and soil rippers are positioned so that their angular and linear vertical position may be adjusted. Soil rippers are formed as wide knifes positioned at an acute angle to horizontal line. Narrow trapezium-shaped arced agitator adjoins leading part of wide knife. Thrower is fixed in upper part of agitator. Wide knife and agitator junction zone has width at least equal to 1/3 of length of knife which is reducing in the direction of upper part. Vertical knives are fixed on flat knives tines. Cutting edges of vertical knives are made in the form of joined curvilinear and inclined portions. Curvilinear portion is defined with second-order line, and its lower part extends at an angle to share base and makes continuation of inclined portion joined to share junction apex. Such construction allows complete soil tillage, such as presowing, sowing and autumn tillage of soil, to be performed. EFFECT: simplified construction, reduced time and power consumption. 4 cl, 10 dwg