Coffee grinder

Abstract

A coffee grinder has a housing that includes a ring burr, a shaft extending through the ring burr to an end, the shaft having an axis of rotation, and a burr having an external surface, the burr having an internal bore that extends therethrough. The internal bore has a surface which is tapered with respect to the axis of the shaft. An interlocking plug is shaped to extend through the internal bore of the burr, the interlocking plug having a sidewall surface which is tapered with respect to the axis of the shaft, such that the sidewall surface abuts the surface of the burr to seat the interlocking plug within the burr. An adjustment knob engages the end of the shaft for locking the interlocking plug within the burr.

What is claimed is: 
     
         1 . A coffee grinder comprising:
 a housing that includes a ring burr;   a shaft extending through the ring burr to an end, the shaft having an axis of rotation;   a burr having an external surface;   an internal bore of the burr that extends through the burr, the internal bore having a surface which is tapered with respect to the axis of the shaft;   an interlocking plug shaped to extend through the internal bore of the burr, the interlocking plug having a sidewall surface which is tapered with respect to the axis of the shaft, such that the sidewall surface abuts the surface of the burr to seat the interlocking plug within the bun; and   an adjustment knob that engages the end of the shaft for locking the interlocking plug within the burr.   
     
     
         2 . A coffee grinder comprising:
 a housing that includes a ring burr;   a shaft extending through the ring burr to an end, the shaft having an axis of rotation;   a burr having an external surface;   an internal bore of the burr that extends through the burr, the internal bore having a surface which is tapered with respect to the axis of the shaft;   an interlocking plug shaped to extend through the internal bore of the burr, the interlocking plug having a sidewall surface which is tapered with respect to the axis of the shaft, such that the sidewall surface abuts the surface of the burr to seat the interlocking plug within the burr;   wherein the interlocking plug and the burr engage each other in a manner that prevents any play or wiggle between therebetween; and   an adjustment knob that engages the end of the shaft for locking the interlocking plug within the burr.