PNEUMATIC SEEDING UNIT Russian patent published in 2000 - IPC

FIELD: agricultural engineering, in particular, seeding devices of precision drills. SUBSTANCE: seeding unit has base, faceplate and washer which are provided with through openings for sucking large seeds. Faceplate has circumferential equally spaced groups of through slots for sucking small seeds. Seed chamber is divided into two isolated lower and upper cavities. Lower cavity bottom is formed as leaf spring whose front end is fixed and rear end is positioned for movement and may be fixed. Excessive large seeds are thrown by outer surface of upper cavity bottom. EFFECT: wider operational capabilities by providing simultaneous seeding of different crop seeds and improved quality of seeding. 2 cl, 2 dwg