PNEUMATIC FEED Russian patent published in 1997 - IPC

FIELD: agricultural engineering. SUBSTANCE: pneumatic feed has feed disk 2 with holes 3 seed suction force regulator 7 installed in vacuum chamber in zone of excess seed flicker fingers. Regulator 7 is made in form of ring sector plate mating with end face of feed disk. Pneumatic feed has also mechanism to provide movement and fixing of plate relative to circumference of centers of holes of feed disk for overlapping part of area of the holes. Smaller radius of regulator plate is equal to radius of circumference of centers of holes of feed disk. Round hole 9 and arc slot 10 are made in plate on its edges to engage with turning eccentrics. Pneumatic feed has seed flickering corrector 16 made in form of arc-shaped plate installed at end of vacuum chamber. Plate is furnished with mechanism providing its displacement and fixing relative to circumference of centers of holes of feed disk for overlapping part of area of the holes. Smaller radius of corrector plate exceeds radius of circumference of centers of disk holes by value of radius of these holes. Corrector plate displacement mechanism is made in form of turnable shaft 17 rigidly secured on one of plate ends. EFFECT: improved quality of single seed feeding. 3 cl, 2 dwg