TOOTHED GEAR MILL Russian patent published in 2000 - IPC

FIELD: equipment for grinding soft rocks. SUBSTANCE: toothed mill has casing incorporating two pairs of toothed wheels, which are in paired engagement one with the other. Shafts of one pair of toothed wheels are inserted into hollow shafts of other pair of toothed wheels. One ends of driven gear wheel shafts are rigidly coupled one to the other and respective ends of drive gear wheel shafts are connected through force exerting coupling providing controlled preliminary twisting of shafts through predetermined angle. Gear wheel slot surfaces have inclined recesses positioned at an angle to end surface of gear wheel. EFFECT: increased efficiency, increased extent of grinding materials and reduced power consumption. 3 dwg