PNEUMATIC FEED Russian patent published in 2011 - IPC A01C7/04 

FIELD: agriculture.

SUBSTANCE: pneumatic feed includes a housing with a seed chamber where a seed drum with radial holes is placed on a horizontal shaft. On the outside generant of the drum a removable ring with calibrated holes is fixed which are located over the radial holes. Inside the drum at the area of contact of the seed chamber and the neck a cutoff of vacuum is mounted. Also, the device has a blowing nozzle, the receiver of seeds, seed-throw device, air ducts for supply of compressed air and for supply of vacuum, and a loading fitting. Behind the cutoff of vacuum on the inside part of the seeding drum an additional air duct for supplying compressed air with a purge nozzle is mounted. At that the receiver is made in the form of a cylindrical generant with a neck installed tangentially and downward. Loading fitting is connected to the receiver of seeds below the line of contact of cavities of seed chamber and the neck.

EFFECT: invention enables to provide improved accuracy of sowing small-seeded grain.

3 dwg