Patent ID: 7886998
Filing Date: 2011-02-15
Classification: B02C,Y10T

Abstract:
1. A grinding machine comprising: a grinding housing; a plurality of removable orifice plates with grinding openings, wherein the orifice plates are configured for assembly to the grinding housing, and wherein the size of grinding openings on each plate varies between plates, wherein a first orifice plate includes relatively small grinding openings and a second orifice plate includes relatively large grinding openings; a plurality of removable guards configured for assembly to the grinding housing, wherein the guards have guard openings sized to correspond to the size of the grinding openings in an inverse fashion wherein a first guard having relatively large guard openings is adapted for use with the first orifice plate and a second guard having relatively small guard openings is adapted for use with the second orifice plate; and a means for assembling the guards to the housing that is configured such that the first and second guards can be assembled with the first orifice plate but only the second guard can be assembled with the second orifice plate.