Grain cleaning and polishing machine

A grain cleaning and polishing machine which comprises a vertical housing;

• a cylindrical screen concentrically arranged within said housing at a distance therefrom sufficient to leave an annular space therebetween;
• a vertical hollow shaft rotatably mounted at the central axis of said inner space defined by the screen;
• drive means coupled to said rotatable shaft to impart a rotational movement thereto;
• at least one treatment chamber arranged within the inner space defined by said screen, said at least one treatment chamber including an upper frusto conical stationary baffle provided with a central opening and having at least one stationary brush and at least one set of stationary flexible fingers vertically hanging from its lower surface, and a rotatable disc coupled and supported by said central shaft to rotate in unison therewith, said rotatable disc being arranged in a horizontal position and with its upper surface directly confronted with the lower ends of said at least one stationary brush and said at least one stationary set of flexible fingers at a short distance therefrom, the lower surface of said rotatable disc having at least one downwardly extending projection provided with downwardly and inwardly extending end brackets, one of said end brackets supporting a downwardly and outwardly extending rotatable brush and the other of said end brackets supporting a downwardly and outwardly extending rotatable set of flexible fingers;
• a lower or outlet frusto conical stationary baffle having a central opening and arranged such that the upper conical surface thereof is directly confronted with the lower ends of said at least one rotatable brush and said at least one rotatable set of flexible fingers at a short distance therefrom;
• means for feeding grains above said upper stationary baffle;
• means for discharging treated grains below said outlet stationary baffle;
• and means for forcing an air stream to circulate from the hollow shaft through perforations provided therein into the said at least one treatment chamber, through said screen and outwardly of the machine through the space between said screen and said housing.