Patents by Inventor R. Don Foster

R. Don Foster 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).

  • Method of making expandable member for forming seals and applying force
    Patent number: 4263237
    Abstract: An expandable member is disclosed that includes a molded body of elastomeric material with a core embedded therein. At least a portion of the core is not bonded to the body. A fluid conduit is provided through which fluid can be injected between the core and the unattached portion of the body to move the core and the unattached portion apart and expand the member.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: April 21, 1981
    Inventors: Frank G. Weeden, R. Don Foster