PNEUMATIC SEEDING UNIT Russian patent published in 2002 - IPC

FIELD: agricultural engineering. SUBSTANCE: seeding unit has hopper for separate storage of two crops and disk adapted for seeding two crops and comprising base, layer, first plate with sucking through openings and slots extending along perimeter thereof, and second plate with sucking through openings. Seeding unit is further provided with mechanism for moving second plate relative to first plate to provide for changing the moment of separating seeds of one crop, with separation moment of other crop seeds being unchanged. Length of first plate slots is 1/4 -1/3 the space between sucking through openings of base. Openings of first plate are made elongated and have length making 1/3 - 1/4 the space between base openings. Diameter of second plate is less than diameter of circle circumscribing slots internal surfaces. Seeding unit is used in precise drills for tilled crops. EFFECT: increased efficiency by regulating relative position of two crops sown at different seeding rates and simplified construction. 2 dwg