STEPPED DISC-HOE BOOT Russian patent published in 2008 - IPC A01C7/20 

FIELD: agriculture.

SUBSTANCE: hoe boot consists of the hull with its attachment lug to the tow bar, arm, freely rotating flat disc, anker-scrapper bar with a fertiliser-seed guide pipe with side frames. Disc is arranged at an angle towards the movement direction. One side frame of the anker is made as a bent at an angle vertical wall. The wall is stretched along the external surface of the fertiliser-seed guide; its front part is turned till touching the disc. A flat freely rotating disc is used as the second side frame of the anker-scrapper bar. The arm is rigidly fixed to the hull. The arm is made as a plate with mount assembly and openings for fixation of the drag sealer and additional changeable anker-scrapper bar. Anker-scrapper bar with a seed-fertiliser guide pipe and additional anker-scrapper bar are set on the arm consecutively one after the other, shifted transversely and at levers over each other. Changeable anker-scrapper bar in one of the options is made as unilateral flattered wedge with a fertiliser-guide pipe. Top of the wedge is set 3...5 cm lower than the low-edge of the side frame of the anker-scrapper bar, and its generant is set with a tilt of 15...25° against the vertical. In the other option changeable anker-scrapper bar is made as a scuffle knife-wedge with a seed-fertiliser guide pipe. Vertex angle of the scuffle knife - wedge is less than 30°, lifting angle of the wedge is not more than 15°, and the top of the scuffle-knife is 2...3 cm above the lower edge of the side frame of anker-scrapper bar.

EFFECT: will ensure staged strip seeding and mineral fertiliser dressing.

6 dwg