TOROIDAL DEVICE FOR SEPARATION OF SEEDS Russian patent published in 2009 - IPC B02B1/00 

FIELD: agriculture.

SUBSTANCE: toroidal device for seeds cleaning consists of charging-discharging facility, of drive and screening surface installed by means of spring elements. The screening surface is made in form of torus with multifaceted screw surface along perimeter of sections each made of a perforated strip bent into one side along direct lines arranged at angle to edges of the perforated strip, when screens of different sizes in form of equilateral and isosceles triangles are alternately formed along the length of the perforated strip. Two identical isosceles triangles are located with their bases on both sides of the biggest equilateral triangle; on both sides of these isosceles triangles two identical equilateral triangles are situated with two identical isosceles triangles disposed to the latter with their bases; the equilateral triangle is located on one of the isosceles triangles. Also sides of lesser equilateral triangles differ from the sides of bigger equilateral triangles by the same linear value; while sections are connected to each other with free sides of the said triangles thus forming broken screw lines and screw screening surfaces on the exterior and interior screening surface.

EFFECT: upgraded quality of seed cleaning.

9 dwg