Patents by Inventor Charles E. Bevan

Charles E. Bevan 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).

  • Thermal barrier coating system
    Patent number: 4861618
    Abstract: A thermal barrier coating system for the protection of nickel and cobalt base superalloys at elevated temperature comprises 7% yttria partially stabilized zirconia plasma sprayed in air on a plasma sprayed NiCoCrAlY bond coat which has been plasma sprayed in air.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: August 29, 1989
    Assignee: United Technologies Corporation
    Inventors: Raymond W. Vine, Keith D. Sheffler, Charles E. Bevan
  • Cleaning process for internal passages of superalloy airfoils
    Patent number: 4439241
    Abstract: Residues accumulated during use are removed from the small interior cavities of superalloy airfoils by a process which includes exposing the interior of the part to an aqueous solution of 20-45% potassium hydroxide at a pressure of 10.4-24 kPa (150-350 psi) and temperature of 150.degree.-235.degree. C. (300.degree.-450.degree. F.) for about 20 hours, followed by water blasting using a pressure greater than about 14 MPa (2,000 psi). Unless the part is kept continuously wet between the first and second steps, the second step will not be effective.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: March 27, 1984
    Assignee: United Technologies Corporation
    Inventors: Earle A. Ault, Charles E. Bevan