ROTARY WORKING TOOL FOR LICORICE ROOT HARVESTING MACHINE Russian patent published in 2000 - IPC

FIELD: agriculture. SUBSTANCE: rotary working tool has cylindrical drum 1 and blades attached to drum outer surface at an angle to its axis. Blades are made in the form of three flat detents 3 positioned perpendicular to axis of drum 1 and connected one with the other at site adjacent to drum. Working and rear generatrices of detents are extending in logarithmic spirals 4 which are continuously joined to detent tops. Longest spirals 4 are extending along working part of detents. Spirals 4,5 and their junction sites are surrounded with cylindrical border 7. Blade span increases from ends of drum 1 to its mid portion so that circles described by blades define hoops. EFFECT: enhanced reliability in operation and improved quality of harvested licorice roots. 3 cl, 3 dwg