Patents by Inventor Francis E. Walker

Francis E. 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).

  • Disk performance by co-extrusion
    Patent number: H647
    Abstract: A method for fabricating a gas turbine engine disk by co-extrusion is described which comprises the steps of preparing a cylindrical shaped preform billet having a central bore region of preselected radius r and comprising a first material, and a rim region surrounding the bore region to a radius R of the preform billet and comprising a second material, extruding the preform billet at preselected extrusion temperature through an extrusion die to form an extrusion product of preselected reduction, and removing the disk from the extrusion product.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: July 4, 1989
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Gerard F. Johnson, Francis E. Walker