SUSPENDED NONMOLDBOARD CHISEL CULTIVATOR Russian patent published in 2021 - IPC A01B13/08 

FIELD: agriculture.

SUBSTANCE: suspended nonmoldboard chisel cultivator comprises rack (2), furrow opener, fixed on lateral faces of post (2) one pair of broken soil-loosening plates (1) and hinged paw hinged behind. Soil-loosening plates (1) have a polygonal shape consisting of two parts—medial (3) and lateral (4) with a sharp cutting edge. Ratio of sizes between parts (3 and 4) is equal to or proportionally to golden ratio, medial part (3) is greater than lateral (4), or according to proportions of golden section, medial part (3) is less than lateral (4). Medial sections (3) of broken soil-loosening plates have an elevation relative to the common horizontal by angle from 0 to 50°, are installed with a slope to frontal plane at angle from 40 to 50° relative to common horizontal. Lateral sections (4) of broken soil-loosening plates (1) are deviated from medial sections (4) by angle from 10 to 90°. Polygonal soil-loosening plates (1) are symmetrically installed on stand (2) of working element and are fixed on toe of post (2) or at depth of 45 cm from day surface along common vertical.

EFFECT: increased operating width of deep tiller due to expansion of loosening area, rational profiling of loosening area, improvement of soil crumbling quality without formation rotation at depth of up to 60 cm, reduction of traction resistance.

1 cl, 2 dwg