Patents by Inventor Walter Leodolter

Walter Leodolter 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).

  • Springback stretch press
    Patent number: 4989439
    Abstract: A device and method for taking to account the elasticity of materials during bending operations to cause the proper amount of overbending such that after springback and while at rest, the material assumes its intended shape.
    Type: Grant
    Filed: November 17, 1988
    Date of Patent: February 5, 1991
    Assignee: McDonnell Douglas Corporation
    Inventors: Lee R. Ewert, Sumner B. Sargent, Walter Leodolter
  • Tool sealing arrangement and method
    Patent number: 4426032
    Abstract: A peripheral seal is formed between a pair of metal blanks and spaced opposing tools of superplastic forming and diffusion bonding apparatus by heating the blanks and pressurizing a region between inner and outer weld seams formed in the marginal peripheral edge portions of the blanks. After the blanks are converted by the apparatus into the formed component, the peripheral edge portions containing the seals are trimmed off.
    Type: Grant
    Filed: September 10, 1981
    Date of Patent: January 17, 1984
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Walter Leodolter
  • Tooling for superplastic forming diffusion bonding processes
    Patent number: 4288021
    Abstract: Tooling for use in an autoclave or a hot press for the superplastic forming and diffusion bonding of metals which tooling includes upper and lower portions with a labyrinth seal therebetween having inert counterflowing gas introduced thereto to prevent contamination from flowing across the seal to attack the metal being processed.
    Type: Grant
    Filed: October 3, 1979
    Date of Patent: September 8, 1981
    Assignee: McDonnell Douglas Corporation
    Inventor: Walter Leodolter