Separating contrivance for cereals

Separating contrivance for cereals and similar grain product, comprising:

• two air-penetrable, inclined fluidized bed tables arranged one over the other and capable of being oscillated in relation to a frame;
• means defining an inlet leading to one end of the upper fluidized bed table;
• said upper fluidized bed table being divided between the inlet and the first outlet into at least two sequential regions of different predetermined perforations such that the heavy grain fraction and heavy impurities can fall from said upper fluidized bed table only through said regions;
• means defining a first outlet spaced from the inlet for receiving the light grain fraction from the upper fluidized table;
• means defining a second outlet between the inlet and first outlet for receiving the heavy grain fraction from the upper fluidized table;
• means located at one end of the lower fluidized table for defining a third outlet located at one end of the lower fluidized table outlet for receiving heavy impurities such as stones and the like;
• a floor arranged between the fluidized bed tables and extending generally parallel to the upper fluidized bed table from beneath the second region to the second outlet;
• means for independently supporting said fluidized bed tables for oscillation individually from each other;
• and
• means for separately driving each fluidized table in oscillating fashion.

Contrivance for separating grain products into multiple grain fractions and impurities, which comprises:

• upper and lower fluidized bed tables located in superposed relationship each of said fluidized bed tables being inclined and having an upper end and relatively lower opposite end;
• means for supporting said fluidized bed tables for oscillation individually from each other;
• first drive means for oscillating said upper fluidized bed table;
• second drive means for oscillating said lower fluidized bed table;
• a housing enclosing said fluidized bed tables, said housing including an air inlet below said lower table and an air outlet above said upper table;
• means defining a product inlet at the upper end of said upper fluidized bed table;
• means defining a first outlet at the lower end of said upper fluidized bed table for receiving a light grain fraction;
• means defining a second outlet located between said product inlet and said first outlet;
• said upper fluidized bed table including at least two sequentially arranged perforate regions located between said product inlet and said second outlet for allowing heavy impurities and medium and heavy grain fractions to fall therethrough;
• means defining a floor underlying at least a portion of the perforate regions of said upper fluidized bed table for directing the medium heavy grain fraction into the second outlet;
• means defining a third outlet at the upper end of said lower fluidized bed table for receiving the heavy impurities;
• and
• means defining a fourth outlet at the lower end of said lower fluidized bed table for receiving the heavy grain fraction.

Contrivance for separating grain products into multiple grain fractions and impurities, which comprises:

• upper and lower fluidized bed tables located in superposed relationship each of said fluidized bed tables being inclined and having an upper end and relatively lower opposite end;
• means for supporting said fluidized bed tables for oscillation individually from each other;
• drive means for separately oscillating each of said fluidized bed tables;
• a housing enclosing said fluidized bed tables, said housing including an air inlet below said lower table and an air outlet above said upper table;
• means defining a product inlet at the upper end of said upper fluidized bed table;
• means defining a first outlet at the lower end of said upper fluidized bed table for receiving a light grain fraction;
• means located between said product inlet and said first outlet defining a second outlet;
• said upper fluidized bed table including at least two sequentially arranged perforate regions located between said product inlet and said second outlet for allowing heavy impurities and medium and heavy grain fractions to fall therethrough;
• means defining a floor underlying at least a portion of the perforate regions of said upper fluidized bed table for directing the medium heavy grain fraction into the second outlet;
• said floor means being comprised of plurality of serially arranged adjustable dampers;
• means defining a third outlet at the upper end of said lower fluidized bed table for receiving the heavy impurities;
• and
• means defining a fourth outlet at the lower end of said lower fluidized bed table for receiving the heavy grain fraction.