COMBINED TILLAGE TOOL Russian patent published in 2004 - IPC

FIELD: agricultural engineering. SUBSTANCE: tillage tool has frame and disk batteries attached to frame at an angle to transverse line of tillage tool, mellowing units, leveler and roll. Leveler is made in the form of isosceles trapezium-shaped frame provided with guides arranged in parallel with its side surfaces and symmetrically with respect to its plane of symmetry. Plate-shaped mellowing members are fixed on guides in staggered arrangement. Plates are equipped with sharpened edge. Guides are spaced from one another by distance selected from ratio: b = t•tgγ, where b is distance between two adjacent leveler guides, t is width of plates, γ is plate front cutting edge sharpening angle. Plates are made trapezium-shaped, and sharpened part is defined by front and lower edges at the side of symmetry of leveler. Sharpening angles are selected from ratios: γ≤α, 10^°≤ω≤ 75^°, where α is angle of inclination of leveler guides with respect to its plane of symmetry, ω is sharpening angle defining lower cutting edge and acute angle β of trapezium-shaped plates is selected from ratio: 15^°≤β≤ 80^°.. Plates are fixed in spaced relation with respect to one another, said space being not greater than with of plate. EFFECT: improved mellowing quality and soil leveling quality. 3 cl, 8 dwg