HOPPER FOR LOOSE MATERIALS Russian patent published in 1994 - IPC

FIELD: handling loose materials. SUBSTANCE: device has casing with conical bottom and discharge hole, activator including hollow cone capable of vertical reciprocations provided with ring, pipe, and connected to a source of gaseous fluid, elastic element of toroidal shape with annular slot, partition wall, additional pipe, hollow cylinder with stop member, and valve. The hollow cylinder has hole in its bottom. EFFECT: reliable operation of activator, capacity to control the frequency of vibrations of the activator. 2 cl, 2 dwg