Patents by Inventor Sheena Kum Foster Walker

Sheena Kum Foster Walker 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).

  • Methods and materials for forming in-situ cavities for silicon-based ceramic matrix composite components
    Patent number: 10017425
    Abstract: Methods and materials for forming in-situ features in a ceramic matrix composite component are described. The method of forming a ceramic matrix composite component with cooling features, comprises forming a preform tape, laying up said preform tape to a desired shape, placing a high-temperature resistant fugitive material insert of preselected geometry in the preform tape of the desired shape, compacting the preform tape of the desired shape, burning out the preform tape of the desired shape, melt infiltrating the desired shape, removing the high-temperature resistant insert to form the cooling features during one of the burning out or the melt infiltrating or following the burning out or the melt infiltrating.
    Type: Grant
    Filed: April 23, 2014
    Date of Patent: July 10, 2018
    Assignee: General Electric Company
    Inventors: Michael Ray Tuertscher, Mark Eugene Noe, Glen Harold Kirby, Sheena Kum Foster Walker
  • Method of producing an internal cavity in a ceramic matrix composite
    Patent number: 10011043
    Abstract: A process for producing an internal cavity in a CMC article and mandrels used therewith. The process entails incorporating a mandrel made of a fusible material that is melted and drained during a thermal treatment of a CMC preform to form the CMC article. The mandrel material is preferably non-wetting and non-reactive with any constituents of the CMC preform during the thermal treatment. The mandrel is preferably tin or an alloy of tin.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: July 3, 2018
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Paul Edward Gray, Herbert Chidsey Roberts, III, Glenn Curtis Taxacher, Sheena Kum Foster Walker
  • METHODS AND MATERIALS FOR FORMING IN-SITU CAVITIES FOR SILICON-BASED CERAMIC MATRIX COMPOSITE COMPONENTS
    Publication number: 20160115086
    Abstract: Methods and materials for forming in-situ features in a ceramic matrix composite component are described. The method of forming a ceramic matrix composite component with cooling features, comprises forming a preform tape, laying up said preform tape to a desired shape, placing a high-temperature resistant fugitive material insert of preselected geometry in the preform tape of the desired shape, compacting the preform tape of the desired shape, burning out the preform tape of the desired shape, melt infiltrating the desired shape, removing the high-temperature resistant insert to form the cooling features during one of the burning out or the melt infiltrating or following the burning out or the melt infiltrating.
    Type: Application
    Filed: April 23, 2014
    Publication date: April 28, 2016
    Inventors: Michael Ray TUERTSCHER, Mark Eugene NOE, Glen Harold KIRBY, Sheena Kum Foster WALKER
  • METHOD OF PRODUCING AN INTERNAL CAVITY IN A CERAMIC MATRIX COMPOSITE
    Publication number: 20130285296
    Abstract: A process for producing an internal cavity in a CMC article and mandrels used therewith. The process entails incorporating a mandrel made of a fusible material that is melted and drained during a thermal treatment of a CMC preform to form the CMC article. The mandrel material is preferably non-wetting and non-reactive with any constituents of the CMC preform during the thermal treatment. The mandrel is preferably tin or an alloy of tin.
    Type: Application
    Filed: February 28, 2013
    Publication date: October 31, 2013
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Paul Edward Gray, Herbert Chidsey Roberts, III, Glenn Curtis Taxacher, Sheena Kum Foster Walker