PNEUMATIC SEEDING UNIT Russian patent published in 2005 - IPC

FIELD: agricultural engineering, in particular, farm crop sowing equipment.

SUBSTANCE: pneumatic seeding unit has seeding disk mounted between vacuum chamber and seed chamber. Pressing devices are radially positioned on seeding disk at side adjoining seed chamber, in the vicinity of each suction opening. Each of pressing devices has spring-loaded flexible rod pivotally fixed on tine. Pressing head is fixed on flexible rod at side facing suction opening, concentrically thereto. Diameter of working face of pressing head is half the diameter of suction opening. Roller is fixed at side opposite flexible rod. Roller is contacting with pattern positioned in seed chamber concentrically to axis of rotation of seeding disk and extending from seed ejection point in direction of rotation of seeding disk to path connecting axis of rotation of seeding disk with upper edge of inlet window. Lower part of vacuum chamber is defined by seed chamber bottom. Upper part of vacuum chamber is defined by path offset by 5° toward direction of rotation of seeding disk from path connecting center of rotation of seeding disk with upper edge of inlet window.

EFFECT: improved quality of piece by piece feeding of seeds.

3 dwg