MANUAL SOIL TILLAGE TOOL Russian patent published in 1997 - IPC

FIELD: agriculture, in particular, garden tools for ridge forming, soil tillage, undercutting and removal p soil tillage, cutting of channels for seed sowing, soil surface leveling, grass mowing etc. SUBSTANCE: manual soil tillage tool has member for changing position of blade front surface relative to longitudinal axis of shank within the range of 45-90 deg. Blade has curved section with concavity making 0 to 2/3 of blade width. Main cutting edge has concavity making 0 to 2/3 of blade length. Blade is fixed by bracket on shank. Mentioned member may be fixed at location adjacent to shank and blade (bracket) junction and to blade and bracket junction. Blade has groove with area making 1/30 of complete blade area. Groove may extend along rear or front surface of blade and is narrowing from shank along blade length and height. Groove is offset from main cutting edge of blade. Cutting edge has triangular or curved teeth. EFFECT: wider operational capabilities, increased efficiency and enhanced reliability in operation. 14 cl, 15 dwg