Patents by Inventor Ralph E. Patsfall

Ralph E. Patsfall 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).

  • Patent number: 5243758
    Abstract: A method for making a three-piece hollow airfoil includes preforming three metal sheets into initial shapes and sealing them together to form an in-process assembly. Internal cavities are formed in the assembly prior to sealing. The assembly is subjected to high temperature and pressure to diffusion bond the sheets together at selected points. The cavities are then subjected to internal pressure at high temperature in order to inflate and superplastically deform the assembly to the desired shape. Excess material may be machined off after inflation.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: September 14, 1993
    Assignee: General Electric Company
    Inventors: Jeffrey LeMonds, Jung-Ho Cheng, Gene E. Wiggs, Gary T. Martini, Ralph E. Patsfall
  • Patent number: 4934583
    Abstract: A method for reparing or manufacturing an article, such as a bladed disk, having an integral projection, for example an airfoil, includes first removing a damaged projection to provide a stub, or in new manufacture providing the stub. A collar shaped to register with the stub is provided and bonded to the stub to generate a stub-collar combination. Then a replacement or new projection member is bonded to the stub-collar combination. Finishing then provides the article. Apparatus includes the combination of a metal attachment die and a heating means retained in a recess of the die during bonding.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: June 19, 1990
    Assignee: General Electric Company
    Inventor: Ralph E. Patsfall
  • Patent number: 4883216
    Abstract: A method for repairing or manufacturing an article, such as a bladed disk, having an integral projection, for example an airfoil, includes first removing a damaged projection to provide a stub, or in new manufacture providing the stub. A collar shaped to register with the stub is provided and bonded to the stub to generate a stub-collar combination. Then a replacement or new projection member is bonded to the stub-collar combination. Finishing then provides the article. Apparatus includes the combination of a metal attachment die and a heating means retained in a recess of the die during bonding.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: November 28, 1989
    Assignee: General Electric Company
    Inventor: Ralph E. Patsfall