Patent ID: 7984868

Claim:
A grinder for grinding materials, the grinder comprising: a grinder housing; a grinding burr assembly retained in the housing; the grinding burr assembly having a pair of grinding burrs for grinding material therebetween; a first burr having a first grinding surface; a second burr having a second grinding surface retained generally in opposition to first grinding surface of the first burr; a grinder drive; the second burr is a rotatable burr coupled to the grinder drive; the first burr is a generally non-rotatable burr adjustably retained in the grinder housing; a shaft of the grinder drive extending through the first burr and connected to the second burr with an auger positioned at least in the area between the burrs; a controllable burr adjuster operatively coupled to the grinding burr assembly for controllably adjusting a space between the first and second grinding surfaces of the burrs; the controllable burr adjuster coupled to and moving with the burr adjusted by the adjuster; an adjuster body threadedly engaged with the housing; a controllable burr adjustment drive is engaged with the adjuster body; and the burr adjuster drive is a rotating drive for controllably rotating the adjuster body to controllably adjust a space between the rotatable burr and non-rotatable burr.