GRAIN CLEANING MACHINE Russian patent published in 1999 - IPC

FIELD: agricultural production, flour-milling, elevator and grain storage and mixed feed industry, in particular, cleaning of grain mixtures. SUBSTANCE: grain cleaning machine has feeder with guiding chute and cylindrical screen positioned under feeder and adapted for separating large-sized contaminants. Closed pneumatic system with cross-flow fan has two pneumatic separation channels. Inlet opening and baffle-type window under guiding chute are made in one wall of first pneumatic separation channel. Second channel is joined with wall of sedimentation chamber and communicated with it via bypass air channel. Second channel is communicated with its discharge part with settling chamber positioned within sedimentation chamber. Settling chamber is communicated with suction part of cross-flow fan. Adjustable baffle-type window in curved wall of settling chamber is adapted for communicating with sedimentation chamber. EFFECT: increased efficiency, reduced specific power capacity and improved sanitary and hygienic conditions. 1 dwg