PNEUMOGRATE ARRANGEMENT Russian patent published in 2006 - IPC B07B4/06 

FIELD: the invention refers to agricultural machine building and may be used in machines for cleaning seeds.

SUBSTANCE: the pneumograte arrangement has an installed on a frame an inclined cylinder with possibility of rotating on whose inner surface there are spreading blades which have in transversal section an arch form whose convexity is turned in the direction of the cylinder's rotation; a feeding arrangement and a ventilator installed from the side of the elevated end of the cylinder. From the side of the lowered end of the cylinder at its outlet the arrangement has a cylindrical riddle with limiters of displacement of seeds on its inner surface fulfilled in the shape of curvilinear plates. At that the limiters of displacement of seeds and spreading blades are located on reciprocally transversal planes, besides the spreading blades are fulfilled multisectional and have several curvilinear plots with a different radius of curvature diminishing from the zone of feeding material to the outlet of the cylinder.

EFFECT: increases effectiveness and quality of cleaning of seeds.

2 dwg