WORKING TOOL FOR CULTIVATOR Russian patent published in 2000 - IPC

FIELD: agriculture and horticulture. SUBSTANCE: working tool is formed as plate-shaped disk with protruding central part and flat part. Flat part of disk blade is provided with ten teeth. One flat tooth of disk is positioned in the plane of flat part. Nine teeth are made of three configurations. Three teeth of first configuration are curved in simple line oriented toward protruding part. Three teeth of second configuration are curved in compound line, that is, base is curved away from central part and apex is oriented toward central part. Three teeth of third configuration are curved in simple line oriented away from protruding part. Teeth of three configurations are arranged on disk behind straight tooth in alternating arrangement. To prevent working tool from excessive penetration into soil and injuring crop plant roots, ratio of diameter D of disk and length 1 of teeth are selected to be within the range of D/1 = 3.0-4.0. Apex of tooth of second configuration is positioned in mid portion of distance between apexes of teeth of first configuration and flat tooth, and apex of first curved portion of tooth of second configuration is arranged in mid portion between apexes of teeth of third configuration and flat tooth. Working tool of such construction may be used for soil tillage in collective farms and household plots. EFFECT: increased efficiency, wider operational capabilities and simplified construction. 6 dwg