SEEDING UNIT Russian patent published in 2001 - IPC

FIELD: agricultural engineering. SUBSTANCE: seeding unit has hopper, seeding disk with seed grips connected to seeding zone, and seed ejector made in the form of polarizing disk with rim made from soft non- conductive material and extending circumferentially of polarizing disk. Seed ejector also serves electrostatic charge generator and is positioned so that its rim is sliding over electrostatic grip surfaces. Electrostatic grips are arranged circumferentially of seeding disk. Electrostatic grip surface is provided with longitudinal grooves having section defined by cosine curve: with parameters where r(max) is radius of largest seed (within the limits of sort), m. Shape of grooves allows seeds to contact with the whole surface of grooves to facilitate reliable selection. Seeding units of such construction are used for pocket and stipple drilling of small seed crops. EFFECT: increased efficiency and provision for stable seeding norm. 4 dwg