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Flat cut bit for cranial perforator

  • US 8,152,809 B1
  • Filed: 06/14/2006
  • Issued: 04/10/2012
  • Est. Priority Date: 06/15/2005
  • Status: Active Grant
First Claim
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1. A drill bit for cutting a bone, comprising:

  • a shaft having a first end and a second end, wherein the first end is adapted to engage a drive so that the shaft rotates;

    a cutting assembly having a plurality of cutting teeth, the cutting assembly attached to the second end of the shaft, wherein the plurality of cutting teeth are planar and extend axially and opposite from the first end of the shaft;

    wherein the cutting assembly is planar and extends radially from the shaft, the cutting assembly having a first side facing the first end of the shaft, the first side of the cutting assembly being opposite of the plurality of cutting teeth;

    wherein the cutting assembly is a solid planar plate extending radially from the shaft for preventing escape of drilled particles therethrough;

    wherein the solid planar plate is structured to provide only a horizontal route of escape for bone residue being cut away from the bone relative to the axis of the shaft such that the continued presence of the bone residue slows the cutting rate of the bit into the bone;

    wherein the plurality of cutting teeth extend a radial length of the cutting assembly in order to define a planar cutting surface; and

    a stabilization hub having an end, the stabilization hub having a consistent diameter, the stabilization hub fixedly attached to the second end of the shaft, wherein the stabilization hub is an axial protuberance of the shaft extending further axially than the plurality of cutting teeth.

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