FLEXIBLE HARROW Russian patent published in 1995 - IPC

FIELD: agricultural engineering. SUBSTANCE: flexible harrow has cross bar 5 with telescopic rods hinge-mounted on bar and spring-loaded relative to bar, and lengths 29 and 30 of chain coverer made in form of links with ripping teeth. Rods differ in length and they are arranged on ends of cross bar 3 at angle to direction of movement. Free ends of rods are pointed to each other. Needle disks are mounted on free ends of rods. Needles of disks are arch-shaped and are pointed outwards from rods. Needle disk installed on shorter rod is located before disk of longer rod. Lengths 29 and 30 of chain coverer are hinge-coupled by one end with bar 3 and by other end, with axles of needle disks. With harrow moving, disks, rotating under action of reaction forces of soil, transmit rotary motion of lengths of chain coverer and ripping teeth of the latter provide crushing of soil. EFFECT: improved quality of cultivation of soil. 3 cl, 7 dwg