Patents by Inventor Kevin J. Barb

Kevin J. Barb 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).

  • Publication number: 20040136831
    Abstract: A blade (10) used in a steam turbine has a base (12) for attaching the blade to a hub (H), the blade extending radially outwardly from the hub to a distal, tip end (16). A plurality of holes (H1-Hn) extend a predetermined distance inwardly from the tip end of the blade into the body (18) of the blade. The holes are spaced across a chord (C) of the blade with the number of holes, their individual diameters, and their spacing being a function of the desired mass of the blade, local stress patterns formed at the tip end of the blade, the range of operating speeds of the turbine, vibrations and resonant frequencies created within the turbine, and a minimum wall thickness between the hole and sides (S1, S2) of the blade. The holes reduce the mass of the blade and lessen the forces to which the blade is subjected when the blade is rotating.
    Type: Application
    Filed: January 9, 2003
    Publication date: July 15, 2004
    Inventors: Kevin J. Barb, Douglas C. Hofer