Patents by Inventor Theo A. Notter

Theo A. Notter 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).

  • Drill bit with cutting insert
    Patent number: 5310293
    Abstract: The invention provides a method of manufacturing a twist drill having a cutting insert. The method includes the steps of providing a cutting insert which has a prismatic shape and which comprises a layer of abrasive compact which is bonded to a cemented carbide backing. The insert has on a first facet a cutting edge formed by the abrasive compact layer, and on a second facet a seating surface formed predominantly by the cemented carbide backing. The first and second facets define a predetermined first angle with each other. A twist drill is provided, having a seat in its flank. The seat defines a support surface adapted to receive a seating surface of the insert, and is inclined at a predetermined second angle to the face of the drill. The insert is bonded into the seat, so that the cutting edge of the insert defines the major cutting edge of the drill and the first facet of the insert coincides with the face of the drill. The invention includes cutting inserts and twist drills produced by the method.
    Type: Grant
    Filed: February 4, 1993
    Date of Patent: May 10, 1994
    Inventors: Theo A. Notter, David W. James
  • Drill bit with cutting insert
    Patent number: 5195404
    Abstract: The invention provides a method of manufacturing a twist drill having a cutting insert. The method includes the steps of providing a cutting insert which has a prismatic shape and which comprises a layer of abrasive compact which is bonded to a cemented carbide backing. The insert has on a first facet a cutting edge formed by the abrasive compact layer, and on a second facet a seating surface formed predominantly by the cemented carbide backing. The first and second facets define a predetermined first angle with each other. A twist drill is provided, having a seat in its flank. The seat defines a support surface adapted to receive a seating surface of the insert, and is inclined at a predetermined second angle to the face of the drill. The insert is bonded into the seat, so that the cutting edge of the insert defines the major cutting edge of the drill and the first facet of the insert coincides with the face of the drill. The invention includes cutting inserts and twist drills produced by the method.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: March 23, 1993
    Inventors: Theo A. Notter, David W. James