Patents by Inventor Donald E. Burk

Donald E. Burk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Hole enlarging bit for power drills
    Patent number: 6676343
    Abstract: A drill bit 10 for creating and using a pilot hole 101 in a workpiece 100 to produce a finished hole 102 in the workpiece 100 centered around the pilot hole 101 wherein the drill bit 10 includes an enlarged cutting head member 30 mounted in a concentric relationship to an elongated guide head member 40 wherein both of the head members 30 40 are mounted on a shaft member 20 connected to a power drill 200 such that the elongated guide head member 40 engages the sides of a pilot hole 101 in a workpiece 100 to act as a guide element for the enlarged cutting head member 30 to create the enlarged finished hole 102 in the workpiece.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: January 13, 2004
    Inventor: Donald E. Burk
  • Hole enlarging bit for power drills
    Publication number: 20030063956
    Abstract: A drill bit 10 for creating and using a pilot hole 101 in a workpiece 100 to produce a finished hole 102 in the workpiece 100 centered around the pilot hole 101 wherein the drill bit 10 includes an enlarged cutting head member 30 mounted in a concentric relationship to an elongated guide head member 40 wherein both of the head members 30 40 are mounted on a shaft member 20 connected to a power drill 200 such that the elongated guide head member 40 engages the sides of a pilot hole 101 in a workpiece 100 to act as a guide element for the enlarged cutting head member 30 to create the enlarged finished hole 102 in the workpiece.
    Type: Application
    Filed: October 2, 2001
    Publication date: April 3, 2003
    Inventor: Donald E. Burk