B02C 13/1828

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 on top of a disc type rotor with dead bed protected beater or impeller elements}