WORKING TOOL FOR SOWING BULK MATERIALS Russian patent published in 2001 - IPC

FIELD: agricultural engineering. SUBSTANCE: working tool has peripheral cone 5 and disk. Lower end of peripheral cone generatrix is extending tangentially to disk surface, and upper end of generatrix is extending tangentially to cylindrical surface intersecting apexes 6 of inner ends of blades 2. Peripheral cone is truncated along edge at the level 0.25-0.50 of height h of blades 2. Surfaces of blade inner ends are deflected from tangential planes to cylinder surface for an angle of 5-7 deg. Working tool of such construction may be used in centrifugal mineral fertilizer spreaders. EFFECT: increased efficiency by improved uniformity of bulk material distribution over field surface and increased spreading width. 2 dwg