PNEUMATIC COLUMN Russian patent published in 2002 - IPC

FIELD: machines for cleaning seeds by air flow. SUBSTANCE: pneumatic column includes settling chamber made in form of truncated pyramid with pneumoseparating passage provided with inlet port and discharge hole. Seed material from loading bin is admitted to pneumoseparating passage through inlet port via movable bottom set in motion by feeder. Admixtures and shrinked seeds are entrapped by ascending air flow created in passage by means of fan towards settling chamber. When entering the settling chamber, air flow strikes against baffle plates secured at angle of 45 deg. relative to each other at overlapping which change motion and velocity. Change in parameters of air flow provides for complete settling of shrinked seeds and admixtures in settling chamber. Square opening available in lower portion of settling chamber is used for discharge of admixtures and shrinked seeds to receiving box. Air flow from settling chamber is directed to filter by fan for collecting dust. EFFECT: improved quality of seed cleaning. 2 dwg