Patents by Inventor Philip D. Crouch

Philip D. Crouch 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).

  • Reinforced ceramic investment casting shell mold and method of making such mold
    Patent number: 4998581
    Abstract: A reinforced ceramic investment casting shell mold and method of making such mold. The ceramic investment casting shell mold includes alternate, repeating layers of a ceramic material and a ceramic stucco defining an overall thickness of the shell mold. A fibrous reinforcing material is disposed in the alternate, repeating layers at an intermediate thickness of the shell mold. The fibrous reinforcing material has high tensile strength at elevated temperature and a coefficient of thermal expansion that is less than the coefficient of thermal expansion of the ceramic material and the ceramic stucco. The fibrous reinforcing material is preferably woven into a twisted yarn and disposed in a generally spiral configuration.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: March 12, 1991
    Assignee: Howmet Corporation
    Inventors: Jan M. Lane, John Corrigan, Philip D. Crouch
  • Reinforced ceramic investment casting shell mold and method of making such mold
    Patent number: RE34702
    Abstract: A reinforced ceramic investment casting shell mold and method of making such mold. The ceramic investment casting shell mold includes alternate, repeating layers of a ceramic material and a ceramic stucco defining an overall thickness of the shell mold. A fibrous reinforcing material is disposed in the alternate, repeating layers at an intermediate thickness of the shell mold. The fibrous reinforcing material has high tensile strength at elevated temperature and a coefficient of thermal expansion that is less than the coefficient of thermal expansion of the ceramic material and the ceramic stucco. The fibrous reinforcing material is preferably woven into a twisted yarn and disposed in a generally spiral configuration.
    Type: Grant
    Filed: February 25, 1993
    Date of Patent: August 23, 1994
    Assignee: Howmet Corporation
    Inventors: Jan M. Lane, John Corrigan, Philip D. Crouch