BOOT Russian patent published in 2010 - IPC A01C7/20 

FIELD: agriculture.

SUBSTANCE: boot consists of arc-shaped pole, seed spout and duck foot. The foot consists of a breast and of two mouldboards with sides transitions. Each side transition is bent in form of circumference arc with radius R=a-b-c, where a is width of the mould board of the boot, b is width of the upper point of the boot and c is width of the side transition. The centre O of circumference on arc of which side transitions are made is located on the line of a back cut of the mould board. A back part of the side transition has height where H is depth of boot run. The front part of the side transition is made with a taper at angle α=φ, where φ is angle of friction of soil against steel surface of the side transition. The front part of each side transition is set at point A located at the rib of transition of the upper point into inclined surface of the mould board. Point A is distanced from cross point B of ribs of both mould boards at l_l=0.5·l, where l is length of the transition rib. The back part of the side transition is arranged on line of the back cut of the mould board so, that line drawn through points O and A creates perpendicular to line of the back cut of the mould board.

EFFECT: design facilitates increased operational reliability and decreased power expenditures, it also eliminates process of coil bunching and provides even depth of seed covering with soil and flattened surface of soil upon sawing.

3 dwg