WORKING TOOL FOR AMELIORATIVE APPARATUS Russian patent published in 2002 - IPC

FIELD: agricultural engineering. SUBSTANCE: working tool has knife curved in transverse and longitudinal-vertical planes. Knife vertical upper part has mounting openings for attachment to frame beams of ameliorative apparatus. Lower part of knife has ripper member made in the form of chisel. Working tool is equipped with additional knife arranged and designed symmetrically to main knife. Main and additional knives are mounted in opposed relation one with respect to another and are interconnected through flat blade, which is set in openings formed in knives flat surfaces. Openings are made in the form of rectangular slots, which are inclined to knives generatrices at an angle of 0-15 deg. Slots are offset in equally spaced relation one with respect to another. Slots in rear face of flat blade are adapted for fixing said blade in operating position in knife openings. Cutting edge is formed on front face of flat blade by sharpening of upper face to an angle less than 30 deg. Chisels mounted on free ends of knives are made in the form of bodies of rotation with beveled parts on front faces, with angle of beveling being equal to 20-30 deg with respect to horizontal axis of symmetry. Each chisel has slot in its side surfaces. Knife lower part is arranged in slot cavity and fixed therein by means of pins. Upper vertical part of each knife is offset from longitudinal-vertical plane of symmetry of chisel. Knife curved in transverse-longitudinal-vertical plane is made from thick-wall pipe of large diameter. Cutting edge on knife front face is formed by sharpening of internal surface of thick-wall pipe at an angle of 13-21 deg. Cutting edge on front face of knife is inclined to any generatrix at an angle of 45-75 deg. Working tool is used for cultivation of irrigated and non-irrigated lands with disadvantageous arrangement of plots and high level of ground water. EFFECT: wider operational capabilities and increased water erosion control. 7 cl, 3 dwg