DUCKFOOT TINE Russian patent published in 1996 - IPC

FIELD: agricultural engineering. SUBSTANCE: duckfoot tine of a cultivator has a nose, two symmetric wings, two parts contiguous with the nose, hard-faced blades, and a shank located behind the nose. The working surfaces of the wings and parts contiguous with the nose are curvilinear, and they are formed by parts of cylindrical and conical surfaces whose guiding lines are parabolas of the second order. The cutting edges of the nose are advanced relative to the cutting edges of the wings, and this advance distance Δ is equal to lo-b, where lo is length of the cross-section line of the wing working surface and b is length of a straight line joining the outside points of the working surface of the wing cross-section. EFFECT: higher tillage quality; higher weeding quality; lower consumption of energy; lower specific consumption of metal. 1 dwg