SEEDING UNIT Russian patent published in 1998 - IPC

FIELD: agricultural engineering, in particular, precision drilling equipment. SUBSTANCE: seeding unit has housing with seeding window in its lower part, seeding disk mounted within housing and provided with seed cells and annular bore extending along each cell axis. Spring-biased seed pusher is positioned in bore. Pusher working edge is formed as flat compression spring abutting against front wall of seeding window. Working edge is formed as concave surface with axis of symmetry coinciding with cell axis. Angle of disk plane between tangent to working edge and front wall of seeding window exceeds doubled minimum angle of friction of seed moving across front wall of window and working edge of seed pusher. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 3 dwg