LOUVERED SCREEN Russian patent published in 2020 - IPC A01F12/44 A01D41/12 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural equipment, namely to elements of combine harvesters intended for threshing and grain separation, in particular, to sieve for combine harvesters. Louvre sieve comprises rotary plates installed in the frame on axes one after another, each of the plates has upper and lower parts located on different sides from the pivot axis, the upper part of the plate is made flat and contains a comb along the longitudinal edge, lobes of which are made in the form of segments, and also provided with teeth located between the bank blades and bent from the plate plane downwards and towards the lower part of the plate, the teeth are made with formation in the cross-section of the convexity directed towards the lower part of the plate, the lower part of the plate consists of two shelves, the first shelf lies in one plane with plate top part, and the second flange is bent downward is characterized by that the first flanges of the lower parts of the plates contain through closed holes made and arranged with the possibility of arrangement and movement of teeth of the neighboring pivot plate. Holes have round or oval shape with diameter of 4 to 13 mm or oval with length of 6 to 13 mm and width of 4 to 11 mm. Teeth are made with length and deflection angle, providing constant arrangement of teeth of one plate in corresponding holes of neighboring plate, in particular, with length of 15 to 45 mm and bent from plane of plate at angle of 30° to 90°, on curve based on conic section with radius from 0.5 mm to 3.5 mm. Convexity of teeth is formed in form of wedge-shaped chute, which wide part is located in area of bend teeth, and angle of molding chute in lower part of tooth is 45–100°. Second flange of the lower part of the plates is bent downwards from the plane of the plate at angle of 20° to 44°.

EFFECT: technical result consists in improvement of cleaning quality.

5 cl, 7 dwg