B02C 13/1842

Disintegrating by mills having rotary beater elements {; Hammer mills} with vertical rotor shaft, e.g. combined with sifting devices with beaters rigidly connected to the rotor {the material to be crushed being thrown against an anvil or impact plate by means of beater or impeller elements fixed in between an upper and lower rotor disc with dead bed protected beater or impeller elements}