COMBINED OPENER Russian patent published in 2012 - IPC A01C7/20 

FIELD: agriculture.

SUBSTANCE: invention may be used in sowing machines. The opener comprises mounted on the workdriver a freely rotating flat disc, fastened seed-guide and furrow-making working body. Thereat the furrow-making working body comprises A-hoe with an angle of crumbling a, providing loosening the soil without mixing. On the upper edge of the A-hoe shellboards are attached, mounted with a variable angle to the horizontal plane. The length of the shellboards for shifting soil in the sides is equal to half the length of the upper edge of the A-hoe. To the shellboards the covering knifes are attached, the lower plane of which is horizontal. The A-hoe with the shellboards is mounted on a rack having a toe angle α. To the lower part of the rack through the shim a removable wedge-shaped groove shaper is mounted, which penetration depth h corresponds to the depth of seeds of the culture sown. Freely rotating flat disc has bearing ribs, which ensure its penetration from the cutting plane of the A-hoe on the value of δ, which enables to cut all the weeds and prevent the wrapping of the rack with plant remains.

EFFECT: invention enables to increase the field germination and yield of cultivated and cucurbits crops and make possible to sow the soaked and germinated seeds.

3 dwg