Patents by Inventor Keith R. Zack

Keith R. Zack 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).

  • ROUND CUTTING INSERT WITH CHIP CONTROL FEATURE
    Publication number: 20080317558
    Abstract: A round cutting insert includes a bottom surface, a clearance side surface and a top surface. The top surface includes a chip control feature in the form of a continuous, circumferential depression formed by a substantially planar bottom surface and a pair of upward sloping substantially planar side walls that form an angle with respect to the top surface. The chip control feature may also include a plurality of radially offset bumps located in the depression. The bumps may have the same size and shape, or may have a different size and shape. The top surface also includes an elevated island having one or more indexing marks for easy indexing of the cutting insert.
    Type: Application
    Filed: June 25, 2007
    Publication date: December 25, 2008
    Inventors: Kenneth L. Niebauer, Keith R. Zack
  • Round cutting insert with chip control feature
    Patent number: 7458753
    Abstract: A round cutting insert includes a bottom surface, a clearance side surface and a top surface. The top surface includes a chip control feature in the form of a continuous, circumferential depression formed by a substantially planar bottom surface and a pair of upward sloping substantially planar side walls that form an angle with respect to the top surface. The chip control feature may also include a plurality of radially offset bumps located in the depression. The bumps may have the same size and shape, or may have a different size and shape. The top surface also includes an elevated island having one or more indexing marks for easy indexing of the cutting insert.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: December 2, 2008
    Assignee: Kennametal Inc.
    Inventors: Kenneth L. Niebauer, Keith R. Zack