Patents by Inventor Evan McNeil Ludeman

Evan McNeil Ludeman 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).

  • Use of high temperature insulation for ceramic matrix composites in gas turbines
    Patent number: 6197424
    Abstract: A ceramic composition for insulating components, made of ceramic matrix composites, of gas turbines is provided. The composition comprises a plurality of hollow oxide-based spheres of various dimensions, a phosphate binder, and at least one oxide filler powder, whereby the phosphate binder partially fills gaps between the spheres and the filler powders. The spheres are situated in the phosphate binder and the filler powders such that each sphere is in contact with at least one other sphere and the arrangement of spheres is such that the composition is dimensionally stable and chemically stable at a temperature of approximately 1600° C. A stationary vane of a gas turbine comprising the composition of the present invention bonded to the outer surface of the vane is provided. A combustor comprising the composition bonded to the inner surface of the combustor is provided. A transition duct comprising the insulating coating bonded to the inner surface of the transition is provided.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: March 6, 2001
    Assignee: Siemens Westinghouse Power Corporation
    Inventors: Jay Alan Morrison, Gary Brian Merrill, Evan McNeil Ludeman, Jay Edgar Lane