PNEUMATIC SEEDING UNIT Russian patent published in 2002 - IPC

FIELD: agricultural engineering. SUBSTANCE: pneumatic seeding unit has hopper divided into two sections for two crops, and disk for seeding two crops. Disk has base, cover plate equipped with recesses through which vacuum is created, and layer. Vacuum cutoff device is tightly inserted into slot between cover plate and base and adapted for changing vacuum cutoff moment. Vacuum cutoff device has plated regulator and mechanism for moving regulator tangentially to circle circumscribing suction openings in seeding disk base. Seeding unit of such construction is used in drills for precise seeding of irrigated crops and provides for regulated mutual arrangement in the field of two sown seed crops. EFFECT: increased efficiency and enhanced reliability in operation. 2 dwg