CULTIVATOR WORKING TOOL Russian patent published in 1998 - IPC

FIELD: agricultural engineering, in particular, equipment for surface cultivation of soil. SUBSTANCE: working tool has tine and chisel made in the form of elliptical cone with rounded top part. Cone base has concave-curved surfaces at base and tine junction zone. Tine carries ripper fixed in ripper holder. Ripper is positioned behind chisel and is made in the form of coiled extension spring. Front end of extension spring has catch. Spring fastening device has bracket positioned in tine clearance. Bracket has horizontal slot and opening. Diameter of opening exceeds width of slot by 2-3 times. Opening axis is perpendicular to its side surface and intersects horizontal axis of symmetry of slot. Catch is fixed in horizontal slot by cylindrical retainer mounted in opening. Spring catch is made U-shaped. Free end of catch is inserted into spring coil. Width of catch is equal to length of coiled spring. EFFECT: increased efficiency and improved quality of soil. 3 cl, 4 dwg