PNEUMATIC SEEDING APPARATUS Russian patent published in 2007 - IPC A01C7/04 

FIELD: agricultural engineering.

SUBSTANCE: pneumatic seeding apparatus has hopper, casing, seed chamber, vertical seeding disk having dosing members, excessive pressure channel, intake device, as well as cover and layer with projections. Excessive pressure channel is positioned within casing upper part. Intake device is arranged in vertical position and spring-loaded to disk. Dosing members provided on disk are arranged in two rows in such a manner that their centers are uniformly distributed in two concentric circles. Radius of outer circle is greater than radius of inner circle by value equal to maximum diameter of dosing members. Number of dosing members in outer row is equal to that in inner row. Dosing members of inner row are offset relative to dosing members of outer row by radial angle equal to half the radial angle between dosing members of outer row. Center of excessive pressure nozzle is arranged at circle concentric relative to circles of arrangement of dosing member centers. Radius of this circle is equal to half the total radii of circles of arrangement of dosing member centers. Inner diameter of excessive pressure nozzle is equal to doubled maximum diameter of dosing members. Intake device has two pipes. Projections in cover and layer are provided in such a manner that their length exceeds distance from outer edge of seeding disk to circle along which dosing members of inner row are arranged by value equal to maximum diameter of dosing members.

EFFECT: increased efficiency and high quality of piece-by-piece feeding of seeds.

2 dwg