Method and device for surgical bone grinding

  • US 6,484,954 B2
  • Filed: 12/08/2000
  • Issued: 11/26/2002
  • Est. Priority Date: 12/09/1999
  • Status: Expired due to Term
First Claim
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1. A bone grinder, comprising:

  • a housing having a bone chute therethrough and a chamber intersecting said bone chute, wherein said bone chute has a bone segment entry portion for receiving bone segments, and an exit opening for exiting bone fragments of a predetermined size produced from said received bone segments;

    a grinding assembly provided in said chamber, said grinding assembly rotatable about an axis traversing an extent of said bone chute, wherein said grinding assembly includes;

    (a) a shaft rotatable about said axis, and (b) a plurality of cutting plates, each plate having opposed first and second sides, a corresponding thickness therebetween and an opening through said thickness of the plates between said opposed sides for matingly receiving said shaft, and at least one cutting edge between said opposed sides for fragmenting said bone segments within said entry portion when said cutting plate rotates with said shaft;

    wherein at least two of said cutting plates are adjacent on said shaft so that for said adjacent cutting plates;

    (c) said at least one cutting edge on each of said adjacent cutting plates have contiguous cutting paths, and, (d) said at least one cutting edge on both of said adjacent cutting plates are oriented in a same direction for fragmenting said bone segments.

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