WORKING TOOL FOR SUBSOIL TILLAGE Russian patent published in 1999 - IPC

FIELD: agriculture. SUBSTANCE: working tool has tine carrying share with cutting angle increasing from central to edge parts of share. Section of cutting edge and landward edge of share is made in the form of parabola, with parameter of landward edge parabola exceeding that of cutting edge parabola. Wedge-shaped projections on side faces of tine are made so that these projections and tine have common cutting edge. Improved geometrical parameters of working tool allow ratio of compressive stress and tensile stress to be changed with advantage to the latter. Employment of wedge-shaped projections on tine provides additional layer-by-layer separation of soil layer in transverse plane. EFFECT: increased efficiency by reduced labor consumption for soil ripping and improved quality of soil tillage. 2 cl, 3 dwg