COMBINED TILLAGE TOOL Russian patent published in 2001 - IPC

FIELD: agricultural engineering. SUBSTANCE: tillage tool has frame, hitch, carrier wheels with adjustment mechanism, tine with hoes, hydraulic cylinder, pressure plank, spring, bar, and disks. Ribbed disks are arranged alternatively with slotted disks forward of hoes. Flat hoe is provided with vertical blades equally spaced one from the other, with space being determined from dependence: b=2(a-a¹-δtgα+δ), where δ is agrotechnical factor; a is flat hoe tillage depth; a¹ is ribbed disks tillage depth; α shearing average angle of 45 deg. During operation, combined tillage tool provides preliminary ripping of upper soil layer with ribbed disks. Slotted disks cut soil layer in front of tines to reduce tillage tool draft during advancement and blocking of tines with weeds. Flat hoes undercut soil layer in horizontal plane and rip it with vertical blades. Upon ripping of soil layer with flat hoes, bar rolls it and throws weeds onto aboveground surface. Surface of field is mulched and leveled with disks mounted on flexible pin. Such construction allows soil layer to be effectively tilled for single pass of tillage tool. EFFECT: improved quality of tilled soil, simplified construction and enhanced reliability in operation. 2 cl, 6 dwg