Patent ID: 8282031

Claim:
A disc mill assembly for a pulverizing apparatus, comprising: a housing; a flywheel received in the housing and adapted for being operatively secured to an associated rotating spindle, the flywheel comprising a generally circular disc having: a lower planar side; an upper grinding disk attachment side having at least two raised concentric mating members with sloped surfaces; an annular outer wall extending from the lower planar side to the upper grinding disk attachment side; and an inner wall extending from the lower planar side to the upper grinding disk attachment side and defining a central flywheel opening adapted to receive at least a portion of the associated rotating spindle; wherein the two raised mating members with sloped surfaces comprise an outer mating member and an inner mating member; wherein the outer mating member and inner mating member have different heights; and wherein the sloped surfaces are both at an angle between about 0.5° and 1.5°.