DISKER Russian patent published in 2008 - IPC A01B7/00 A01B21/08 A01B49/02 

FIELD: agriculture.

SUBSTANCE: disker has a frame with several rows of cross bars mounted on it. Vertical posts with axes at the ends are mounted on the bars. Spherical discs are mounted on the axes with provision for rotation about the axes. The discs have incident angle and tilt angle to the vertical and are arranged head-on across the working width. The discs on the bars are mounted in opposite sides and form rows. Each disc of the next row is displaced in the transversely relative the disc on the preceding row. Behind the front rows of bars with spherical discs, bars with corrugated discs are mounted on the frame. The bars are mounted deep in the spherical discs with displacement in the transverse plane for passage through the furrow bottom, formed after passage of the spherical discs.

EFFECT: higher quality of secondary tillage.

4 dwg