Grinders

Claim 1

A HAMMERMILL COMPRISING A HORIZONTAL CAGE HAVING A SUBSTANTIALLY SMOOTH INTERIOR ARCUATE FACE WHICH IS SUBSTANTIALLY THE SURFACE OR REVOLUTION OF A STRIAGHT LINE ABOUT AN AXIAL LINE, SAID CAGE ALSO HAVING A BOTTOM WALL PROVIDED WITH A SUBSTANTIALLY HORIZONTAL UPWARDLY PRESENTED SURFACE, A VERTICAL SHAFT OPERATIVELY MOUNTED ON AND EXTENDING AXIALLY THROUGH THE CAGE IN CONCENTRIC RELATION THEREWITH AND ALONG SAID AXIAL LINE, A PLURALITY OF HORIZONTAL DISKS RIGIDLY MOUNTED CONCENTRICALLY ON THE SHAFT IN AXIALLY SPACED RELATION ALONG THE PORTION THEREOF WHICH IS WITHIN THE CAGE, THE LOWERMOST DISK BEING PROVIDED WITH DOWNWARDLY PROJECTING SWEEPER-FLANGES HAVING DOWNWARDLY PRESENTED EDGES LOCATED IN CLOSE PROXIMITY TO THE UPWARDLY PRESENTED SURFACE OF THE BOTTOM WALL OF THE CAGE SO AS TO CONTACT AND SWEEP AWAY FINE MATERIAL DEPOSITED ON SAID BOTTOM WALL, A PLURALITY OF HAMMERS MOUNTED AROUND AND PROJECTING RADIALLY OUTWARDLY FROM THE PERIPHERY OF THE DISKS, THE OUTER ENDS OF THE HAMMERS BEING LOCATED IN INWARDLY SPACED RELATION OT THE INTERIOR FACE OF THE CAGE, AND AXIALLY EXTENDING BREAKER ELEMENTS MOUNTED ON THE INTERIOR FACE OF THE CAGE IN AXIALLY EXTENDING PERIPHERALLY-SPACED ZONES IN THE SPACE BETWEEN THE CAGE AND THE OUTER ENDS OF THE HAMMERS, EACH OF SAID BREAKER ELMENTS EXTENDING FOR A SUBSTANTIAL DISTANCE AXIALLY ALONG THE INTERIOR FACE OF THE CAGE AND BRIDGING A PLURALITY OF HAMMERS.