COMBINED TOOL Russian patent published in 1999 - IPC

FIELD: agricultural engineering, in particular, equipment for combined soil and young crop cultivation. SUBSTANCE: combined tool has batteries of disk-type rotary working members and leveling bars positioned behind batteries. Leveling bars and batteries are arranged in V-pattern in horizontal plane. Carrier wheel is disposed adjacent to roller within space defined by V-shaped pattern. Outer ends of leveling bars extend outside rotary working members at their both sides for distance equal to width of rotary working members: , where R is radius of rotary working member; k is soil mellowing coefficient (1.1-1.4); α - is angle of attack of rotary working member; h is penetration depth of rotary working members. Inner ends of rotary working members are spaced one from another by distance of b = (1.2-3.5) of Δ B. Leveling bar is positioned above lower points of rotary working members at distance d = (0.9-1.2) h(1), where h(1) is set value of seeding depth. Such construction of combined tool allows adequate following of field relief by working members and reliable embedding of seeds in furrows cut by terminating disks to be provided. EFFECT: increased efficiency, wider operational capabilities and provision for uniform thickness of soil above embedded seeds. 3 cl, 4 dwg