Coffee grinder

  • US 10,413,127 B1
  • Filed: 07/27/2017
  • Issued: 09/17/2019
  • Est. Priority Date: 07/27/2017
  • Status: Active Grant
First Claim
Patent Images

1. A coffee grinder comprising:

  • a housing that includes a ring burr having a first plurality of curved teeth;

    a shaft extending through the ring burr, the shaft having an axis, an interlocking feature, and the shaft extends to an end;

    a frustoconical burr having an external surface with a second plurality of curved teeth;

    an internal bore of the frustoconical burr that extends from a top end to a bottom end, the internal bore having an upper cylindrical surface adjacent the top end, and an interlocking portion adjacent the bottom edge, the upper cylindrical surface being coaxial with the axis of the shaft, the interlocking portion having a side surface which is tapered with respect to the axis of the shaft;

    an interlocking plug shaped to extend through the internal bore of the frustoconical burr, the interlocking plug having an upper cylindrical portion that fits through the upper cylindrical surface, and a lower portion that includes a sidewall surface which is also tapered with respect to the axis of the shaft, such that the sidewall surface interlocks with the side surface of the frustoconical burr;

    a mating feature of the upper cylindrical portion of the interlocking plug that engages the interlocking feature of the shaft to prevent rotation of the interlocking plug with respect to the shaft; and

    an adjustment knob that engages the end of the shaft for locking the interlocking plug within the frustoconical burr, and the frustoconical burr within the ring burr.

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