TWIN WORKING TOOL FOR CULTIVATOR Russian patent published in 2000 - IPC

FIELD: agriculture and horticulture. SUBSTANCE: working tool has hub and two disks. Disk blades are made platelike, with projecting central and flat parts. Flat part of disk blade has ten teeth. One tooth of each disk is made flat and positioned in the plane of flat part of disk blade. Nine teeth of each disk are made in three configurations. Three teeth of first configuration are curved in simple line oriented toward projecting part. Three teeth of second configuration are curved is compound line, that is, base is curved in the direction away from central part and apex is directed to central part. Three teeth of third configuration are curved in simple line oriented toward projecting part. Teeth of three configurations are arranged behind straight tooth on disk in alternating order. Ratio of diameter D of disk and length 1 of teeth is within the range of D/1=3.0-4.0. Ratio of diameter D of disk and distance L in horizontal plane between its flat parts is within the range of 3.5-4.5 and provides teeth track spacing of 0.5-1.5 cm through the whole width. Such arrangement prevents formation of untilled strips through the whole length and width of plot. Apex of tooth of second configuration is positioned in mid portion of distance between teeth of first configuration and flat part, 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 part. Such construction prevents working tool from excessive penetration into soil and, as a result, from injuring of crop rootage. EFFECT: increased efficiency and improved quality of cultivated soil. 2 cl, 6 dwg