Apparatus for reducing materials

Claim 1

APPARATUS OF THE CHARACTER DESCRIBED, COMPRISING: A CONTAINER HAVING A BOTTOM WALL AND A SIDE WALL; A ROTATABLE SHAFT IN SAID CONTAINER EXTENDING ABOVE SAID BOTTOM WALL; AN IMPELLER DISC SPACED ABOVE SAID BOTTOM WALL CARRIED BY SAID SHAFT, SAID IMPELLER DISC HAVING ALTERNATELY UPWARDLY AND DOWNWARDLY EXTENDING PERIPHERAL TANGENTIAL VANES COACTING WITH SAID SIDE WALL FOR CIRCULATING A MATERIAL IN THE CONTAINER IN A SUBSTANTIALLY RADIAL OUTWARD PATH FROM SAID SHAFT TOWARDS SAID SIDE WALL, SAID SIDE WALL DEFLECTING THE MATERIAL FROM THE OUTWARD FLOW PATH INTO RETURN PATHS TOWARD SAID SHAFT POSITIONED ABOVE AND BELOW SAID OUTWARD PATH; AND A PLURALITY OF CUTTING BLADES CARRIED BY AND ROTATABLE WITH SAID SHAFT, SAID BLADES EXTENDING ABOVE AND BELOW SAID IMPELLER DISC INTO THE RESPECTIVE RETURN PATHS OF MOVEMENT OF SAID MATERIAL.