MOLE DRAINAGE DEVICE Russian patent published in 2017 - IPC E02B11/02 

FIELD: agriculture.

SUBSTANCE: invention relates to irrigation and drainage equipment and is used in creating mole drains. The device comprises a vertical knife, a horizontal knife with leans arranged symmetrically relative to the vertical knife, with the drainer attached to each of them, with the cross section in the form a figure of constant width, with the front cutting edge beveled at an acute angle to the motion direction line and the cantilevered cutting portions after the drainers. The drainers in cross section are made in the form of a Reuleaux triangle. One corner of the Reuleaux triangle in cross section is located in the drainers' upper parts. The wings and the cantilever cutting portions are attached to the drainers in the plane of the Reuleaux triangle bottom corners location.

EFFECT: invention enhances the stability of the arch and the walls of the drains.

2 dwg