WORKING TOOL FOR PREPARING OF SOIL AND PLANTING OF SEEDLINGS Russian patent published in 2006 - IPC A01B49/06 A01B13/02 A01C11/02 

FIELD: agricultural engineering.

SUBSTANCE: working tool has frame comprising sequentially arranged A-hoe, furrow-forming conical screw, and planting chamber. A-hoe consists of tine, blade, and is additionally furnished with active working device consisting of two double-thread conical screws. Each conical screw is arranged at an angle to transverse-vertical and horizontal planes. Double-thread conical screws are located in bearings within rear part of A-hoe. Angle of double-thread conical screw to transverse-vertical plane is selected so that tangent drawn to outer points of screw coils is extending in parallel with rear edge of A-hoe blade. Said angle to horizontal plane is selected so that axis of double-thread conical screw positioned in rear part of A-hoe is arranged at a taper angle. Furrow-forming conical screw is positioned at an angle of 45-75 deg to horizontal plane. Mellowing knives are positioned circumferentially to helical surface of screw.

EFFECT: improved quality of mellowing and soil mixing, avoiding of furrow compaction and creation of advantageous conditions for adaptability of seedlings, and reduced draft of working tool.

3 cl, 8 dwg