Pulverizer with caster roller assembly

Apparatus for pulverizing material including hard material into comminuted particles comprising a housing, a rotatable table mounted within said housing, a grinding ring mounted on said table and defining a circumferential path on said table, means for rotating said table, means for introducing said material into said housing in contact with said grinding ring, at least three rollers disposed in said housing, means for mounting said rollers in said housing for rotation about respective axes of rotation, said mounting means including a supporting ring disposed above said roller, a plurality of brackets, each of said rollers being mounted on a respective one of said brackets, and a plurality of shafts, each one of said shafts being connected between said ring and a respective one of said brackets and defining a swivel axis lying forward of the axis of rotation of its respective roller, and means for absorbing a shock load applied to said roller disposed between said brackets and said mounting ring and adapted to allow said rollers to move about said respective swivel axes.