Diamond core drill bit

  • US 7,204,244 B1
  • Filed: 03/02/2006
  • Issued: 04/17/2007
  • Est. Priority Date: 03/02/2006
  • Status: Active Grant
First Claim
Patent Images

1. A diamond core drill bit comprising,a nickel-plated body in the form of a right-circular cylinder and having a plurality of grooves creating an uneven, wave-like bonding surface, said grooves being parallel to each other and axial in height extending from at least one bottom circumferential sidewall of the body;

  • diamond grit bonded around the bottom circumferential edge of the body on a portion of the internal and external sidewalls wherein the diamond grit is bonded over a portion of the axial height of the grooves so as to create multi-directional bonding forces between the diamonds and the bonding surface;

    a nickel-plated cap at the top of the body having a central lubrication hole; and

    ,a nickel-plated hollow shaft mated to the cap over the central lubrication hole wherein a lubricant can flow through the hollow shaft and into the internal volume of the body and out the side lubrication hole.

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