AIR-OPERATED SEEDER UNIT Russian patent published in 1995 - IPC

FIELD: agricultural engineering. SUBSTANCE: air-operated seeder unit has seed chamber 1 and vacuum chamber 2. A seeding disk is shaft-mounted between the chambers. The disk is provided with holes 12 and straps. The straps have cut-outs. Gasket 6 is located between the cut-outs. The gasket has protuberance 8 in the zone of deflection of excessive seeds. The protuberance has wedge- shaped cut-out 9. The lower edge of this cut-out is formed by an arc of a circle having its center on the axis of rotation of the seeding disk. The upper edge of the cut-out is formed by a part of, for instance, a spiral. The beginning of the spiral is in register with the center of this circumference and partitions 10. The height of the partitions on the cut-out side may range from 0.1 to 1.0 diameter of suck-through hole 12. EFFECT: higher efficiency; more precise seeding. 3 dwg