LIPPED SCREEN Russian patent published in 2013 - IPC A01F12/44 A01D41/12 

FIELD: agriculture.

SUBSTANCE: invention relates to agricultural machinery industry and can be used in systems of cleaning of grain combine harvesters and stationary grain cleaning machines. The lipped screen comprises rocking doors 3 mounted in the frame 1 with the upper and lower working surfaces located on either side of the pivot point. The upper working surface is made with a flat comb 7 along the longitudinal edge and the teeth located between the comb lobes with the grooved shape of the cross section and the decreased width of the tooth from the base to its end. The teeth are bent from the comb plane downwards and are directed with the convex of the cross section towards the lower working surface bent along a longitudinal line downwards with respect to the comb plane. Opposite the curved teeth in the lower working surface the through grooves 9 are made.

EFFECT: lipped screen design provides improvement of its aerodynamic performance and more efficient use of the air flow of ventilator.

8 cl, 7 dwg