LOOSE MATERIAL PROPORTIONING FEEDER Russian patent published in 1994 - IPC

FIELD: electric-vacuum engineering. SUBSTANCE: feeder has a pneumatic distributor mounted in a cover of filling bin, the distributor is in communication with a compressed air feed system. Shaft is made hollow and each blade is tightly fastened to shaft by helical tube spring, the cavity of shaft is connected to pneumatic distributor and tubular springs by radial grooves made in upper and lower ends of shaft respectively. The junction of the shaft cavity with the pneumatic distributor is sealed by a gland. EFFECT: improved efficiency of usage. 1 dwg