HARROW TOOTH Russian patent published in 2020 - IPC A01B23/02 

FIELD: agriculture; machine building.

SUBSTANCE: invention relates to agricultural machine building, in particular to tooth harrows for tillage. Harrow tooth is characterized by that it includes a threaded part, a mounting part, a wedge-shaped working surface with faces and ribs, valve assembly located in the threaded and mounting parts and consisting of a ball valve, a spring and a seat, a supply hole connected to the ball valve and made coaxially with the axis of the tooth, wherein additional holes are adjoined and connected thereto with jets fitted thereon and arranged on two planes perpendicular to the axis of the tooth. At that, fluid is fed via feedthrough via valve assembly. On one plane there are four jets, one on each rib. Planes are located at different distance from lower surface of attachment stop of harrow tooth to frame of harrow. When treating soil with plants with short roots, lower-stage jet nozzles are plugged by pointed plugs to prevent their blocking with soil. When treating soil with plants with long roots, jets of upper tier are plugged by means of also pointed plugs. Presence of the valve unit in the zone of threaded part of the tooth fixing stop prevents non-productive liquid leaks at turns or transition of the unit to the other processing section. Depending on agrotechnics of cultivation it is possible to regulate quantity of jets in tooth or to install jets with different diameter of holes.

EFFECT: broader functional capabilities of the harrow with square-section teeth and increased yield of agricultural crops, as well as saving liquid mineral fertilizers, elimination of harmful effect of liquid fertilizers on the environment.

6 cl, 4 dwg