PLOUGHSHARE Russian patent published in 2011 - IPC A01C7/20 

FIELD: agriculture.

SUBSTANCE: ploughshare comprises a body, a lead for attachment to a frame, two flat sharpened discs, a seed guide, a scraper, two ball bearings. The ploughshare is equipped with a figured plate of highly wear resistant steel, which is rigidly fixed with the help of an adapter to the ploughshare's body. The plate length is determined according to the following formula: , where h - depth of ploughshare travel; α - angle of plate inclination to the furrow bottom α≥φ, where φ - angle of steel plate friction against soil on the furrow bottom equal to 26…30°. The plate has conical shape similar to the shape of vertical cross section of the furrow. In the front (upper) part at the outlet of the furrow the plate width is a=a'-Δa, where a' - largest width of the furrow in the upper part, Δα=2…3 mm - upper gap between the plate and the furrow walls. In the rear (lower) part the plate width is determined using the formula: b=b'-Δb, where b' - least width of the furrow in the lower part; Δb=2…3 mm - lower gap between the plate and the furrow walls. The adapter is made of spring steel, and in the upper part it has longitudinal holes for fastening bolts to adjust adapter's and figured plate's height with changing value of soil mass density around seeds placed on the furrow bottom.

EFFECT: structural design will make it possible to increase operational reliability, and also to increase crop capacity due to provision of agrotechnical requirements in sowing seeds.

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