ORGANIC FERTILIZER SPREADER Russian patent published in 2004 - IPC

FIELD: agricultural engineering, in particular, machines for spreading of organic fertilizer from rolls over field surface. SUBSTANCE: spreader has frame with carrier wheels, hitching mechanism, flow divider, lifting knife and spreading tools. Lifting knife and spreading tools are mounted on frame. Spreading tools are made in the form of multiple-spade rotors having four rows of blades, with three blades of equal radius in each row. Blades in different rows have various lengths increasing from leading part of rotor in direction of advancement of spreader. Blades in each subsequent row of blades, beginning from rotor leading part, are offset by 30 deg to side opposite to rotation direction to form three-thread groove of variable diameter on rotor shaft. Spreading tools are driven by means of tractor power shaft through cardan shaft and drive mechanism including cam-type safety clutch. EFFECT: uniform distribution of fertilizer over field surface in accordance with rate of fertilizer usage, reduced power consumption and increased efficiency. 2 dwg