COMBINED SOIL TILLAGE TOOL Russian patent published in 1998 - IPC

FIELD: agriculture. SUBSTANCE: tillage tool has frame 1 with hitch 2 and carrier wheels 3, disk batteries 4 mounted on frame at an angle to transverse line of tool, flat hoes 5, spring-biased frame 6 and roller 7. Working members of roller are formed as toothed planks extending along multiple-thread spirals, whose coils are directed towards rear ends of disk batteries. Coil pitch is increased in direction of rear ends of disk batteries. Such construction allows required soil displacement along width to be provided. Angle between spiral line and cylinder generatrix or roller conical surface does not exceed 10 deg along track of rear ends of disk batteries and is 35-50 deg along track of their front ends. EFFECT: increased efficiency, high quality of soil crumbling, leveling and compaction and enhanced reliability in operation. 2 cl, 4 dwg