PNEUMATIC VACUUM SEEDING UNIT Russian patent published in 2008 - IPC A01C7/04 

FIELD: agricultural engineering.

SUBSTANCE: seeding unit has casing, seed chamber, seeding disk, and low-pressure chamber. Seeding disk is mounted within casing on horizontal shaft and provided with suction openings. Low-pressure chamber and excessive seed baffle adjoin seeding disk. Seed chamber is fixed on casing by means of cylindrical pivot joint. Seed chamber wall surfaces define junction line intersecting circumferential line along which centers of suction openings are arranged on end surface of seeding disk, at side of seed chamber. Cam sleeve positioned on horizontal shaft comes into engagement with supporting roller which is fixed on seed chamber wall by means of bracket. Seed chamber is spring-loaded relative to casing of apparatus. Axial line of cylindrical pivot joint of rotation of seed chamber is perpendicular to end surface of seeding disk. Axial line also passes through point of intersection of circumferential line, along which centers of suction openings are arranged, with junction line of surfaces defining walls of seed chamber.

EFFECT: reduced number of seeds omitting discharge procedure, provision for sowing of all seeds from seed chamber, and high quality of single-seed dosing of seed material.

1 dwg