Patents by Inventor Charles S. Landram

Charles S. Landram 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).

  • Method for maintaining a cutting blade centered in a kerf
    Patent number: 6412377
    Abstract: A saw having a self-pumped hydrodynamic blade guide or bearing for retaining the saw blade in a centered position in the saw kerf (width of cut made by the saw). The hydrodynamic blade guide or bearing utilizes pockets or grooves incorporated into the sides of the blade. The saw kerf in the workpiece provides the guide or bearing stator surface. Both sides of the blade entrain cutting fluid as the blade enters the kerf in the workpiece, and the trapped fluid provides pressure between the blade and the workpiece as an inverse function of the gap between the blade surface and the workpiece surface. If the blade wanders from the center of the kerf, then one gap will increase and one gap will decrease and the consequent pressure difference between the two sides of the blade will cause the blade to re-center itself in the kerf.
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: July 2, 2002
    Assignee: The Regents of the University of California
    Inventors: Kenneth L. Blaedel, Pete J. Davis, Charles S. Landram
  • Hydrodynamic blade guide
    Patent number: 6082239
    Abstract: A saw having a self-pumped hydrodynamic blade guide or bearing for retaining the saw blade in a centered position in the saw kerf (width of cut made by the saw). The hydrodynamic blade guide or bearing utilizes pockets or grooves incorporated into the sides of the blade. The saw kerf in the workpiece provides the guide or bearing stator surface. Both sides of the blade entrain cutting fluid as the blade enters the kerf in the workpiece, and the trapped fluid provides pressure between the blade and the workpiece as an inverse function of the gap between the blade surface and the workpiece surface. If the blade wanders from the center of the kerf, then one gap will increase and one gap will decrease and the consequent pressure difference between the two sides of the blade will cause the blade to re-center itself in the kerf.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: July 4, 2000
    Assignee: The Regents of the University of California
    Inventors: Kenneth L. Blaedel, Pete J. Davis, Charles S. Landram