AIR-OPERATED SEEDING UNIT Russian patent published in 2004 - IPC

FIELD: agricultural engineering. SUBSTANCE: seeding unit has case, seeding disk, seed and vacuum chambers, and excessive seed ejector. Ejector has two spring-loaded conical heads adjoining with their large ends to seeding unit surface. Conical heads are arranged radially at both sides in equally spaced relation from movement path of centers of sucking openings in seeding disk. Conical heads are equipped with mechanism for radial synchronous movement of heads. Said mechanism includes two spring-loaded slides connected to excessive seed ejector through links with pivot joints. Seed ejector is pivotally connected to lever-retainer of link mechanism. EFFECT: simplified construction and improved quality of single seed feeding. 2 cl, 2 dwg