CULTIVATOR WORKING TOOL Russian patent published in 1998 - IPC

FIELD: agriculture. SUBSTANCE: working tool has tine 1 and chisel 5 made in the form of elliptical cone with rounded apex. Cone base has concave-curved surfaces at base and tine junction portions. Tine 1 is provided with soil ripper 9 and attachment member. Ripper 9 is positioned behind chisel 5 and made in the form of coiled extension spring. Front end of extension spring is equipped with catch 12. Extension spring attachment device has bracket 10 disposed in tine opening. Bracket 10 is provided with horizontal slot and hole 14. Diameter of hole 14 is larger than width of slot by 2-3 times. Hole axis is extending perpendicular to side surface and intersects horizontal axis of symmetry of slot. Catch 12 is fixed in horizontal slot by cylindrical retainer disposed in hole 14. Spring catch 12 is made U-shaped. Free end of catch 12 is inserted into spring coils to prevent catch 12 from straightening or flexure. Width of catch 12 is equal to length of cylindrical retainer. During operation of working tool, spring coils are movable to form soil aggregates and eliminate weeds. EFFECT: increased efficiency, improved quality of cultivated soil and weed control. 3 cl, 4 dwg