COMBINED SOIL TILLAGE UNIT Russian patent published in 1998 - IPC

FIELD: agricultural engineering. SUBSTANCE: tillage unit has rotary drum mounted above flat hoes and covering roller. Hoe tines are made curved, with convexities being oriented in direction of advancement of tillage unit. Circle circumscribed by ends of rotary drum knives overlaps curved part of hoe tines in their lower part in hoe attachment zone. Hoe tines and drum are secured on parallelogram suspension. Drum may be hanged on spring-loaded tie-rod. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 3 cl, 1 dwg, 1 tbl