Patent ID: 6634584
Filing Date: 2003-10-21
Classification: B24B,B24D

Abstract:
A comminuting apparatus for reducing the size of particles, comprising:a frame providing an internal perimeter and having a shape; a stone having a grinding surface for grinding a material and providing a perimeter having a shape corresponding to the shape of the perimeter of the frame and configured to be at least partially surrounded by the frame; wherein when the frame is rotated, the frame is configured to coact with the stone such that the stone is rotated at substantially the same rate as the frame; and wherein both the frame and the stone include at least one geometric shape selected from the group consisting of oval, hexagonal, square, and star shapes, and wherein upon rotation of the frame, the at least one geometric shape of the frame coacts with the at least one geometric shape of said stone to thereby enable rotation of said stone but whereby said stone is substantially inhibited from independently rotating relative to said frame due to said geometric shapes, and wherein said stone is substantially unstressed in said frame.