DRILL Russian patent published in 2004 - IPC

FIELD: agricultural engineering; soybean drills. SUBSTANCE: proposed drill has roller feeds with diagonal ribs. The latter are provided with brush edging and are made at equal angles in left-hand and right-hand directions relative to axis of rotation of rollers. They are installed with coupling on shaft in seed boxes with spring- loaded valves and sockets with slots. End face part of valves of roller feeds is rectangular. Drill contains even number of rollers, half of which is made with left-hand direction of ribs and the other, with right-hand direction of ribs. Adjacent rollers are installed on shaft with ribs pointed to each other. EFFECT: improved uniformity and continuity of metering out, decreased seed damage. 2 cl, 5 dwg