ELITE GRAIN THRESHER Russian patent published in 1997 - IPC

FIELD: agricultural engineering, in particular, elite corn grain threshing equipment. SUBSTANCE: thresher has cylinder 4 with concave 5, rotary screen 6 and grain receiver 10. Screen 6 and grain receiver 10 are positioned below concave 5. Grain receiver 10 is communicated through aspiration channel 11 with cyclone 12 connected with fan 13. Cyclone 12 has discharge bottom 15 formed as rotary gate provided with lever and air valve 16 positioned in top part of cyclone 12 and connected with gate lever through tie-rod 17. One end 18 of tie-rod 17 is inserted through valve 16 into cyclone 12 so that tie-rod 17 may be easily moved relative to valve 16 for distance A. Restricting member 19 formed as washer is rigidly mounted on tie-rod 17 above top end surface of valve 16. When gate 15 is closed, restricting member 19 abuts against valve 16. Restricting member 20 is fixed on tie-rod end 18 extending into cyclone 12. Restricting member 20 is spaced from valve 16 by distance A and may be moved and fixed along end 18, provided with thread, which may be engaged with threaded opening of restricting member 20. Distance A may be regulated by moving restricting member 20 along end 18 and, as a result, free movement of tie-rod 17 relative to valve 16 may be adjusted. EFFECT: increased efficiency in high-quality cleaning of grain from contaminants, reduced labor intensity and increased output. 2 cl, 1 dwg