CLEANER OF GRAIN COMBINE Russian patent published in 1997 - IPC

FIELD: agricultural engineering. SUBSTANCE: cleaner has upper sieve shoe 1 and lower sieve shoe 2, extension of screen 3, attached to upper sieve shoe 1 so that its position may be adjusted, conveyance trough 4 with separating surface 5, rake-type mechanism 6 above trough 4 and pen 7 positioned below separating surface 5 of trough 4. Extension arm attached to rear part of screen extension is pressed with its free end to front part of conveyance trough by springs. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 2 cl, 3 dwg