COULTER FOR WIDESPREAD SOWING SEEDS AND FERTILISERS Russian patent published in 2010 - IPC A01C7/20 

FIELD: agriculture.

SUBSTANCE: coulter includes a grain conductor, a rack, the lower part of which is attached to the soles. The sole has a disperser of and fertilisers and is installed in the space under the paw of center hoe. The inner surface of center hoe is equidistant to upper surface of sole. On the wings of the center hoe in the upper part the reference platform is made, having a support in the front part, on which the shoe is set. The front part of the shoe is made in the form of a wedge, and the back has a liner with holes for the grain conductor and mounting of the rack to the sole. The front face of the shoe wedge is made on a curve tangent to the line which is formed by the front working desk of the face, made, as well as the front face of the wedge, with a radius of curvature equal to half the diametre of the support the paw reference platform. At that planes of symmetry of the paw reference platform, the support of the reference platform, the shoe, the sole, as well as the centers of shank holes coincide with the plane of the coulter symmetry.

EFFECT: reliability of operation and implementation of a uniform distribution of seeds in a depth with a decrease in traction resistance.