Patents by Inventor Walter Benedum

Walter Benedum 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).

  • Tubular one-way closure for injecting a material into a hole
    Patent number: 4146094
    Abstract: A tubular one-way closure for injecting a material, particularly synthetic plastic foam material, into a hole has a throttle channel through which the material is to be injected, and a central tube rotatable about its axis and movable in its axial direction. The closure also comprises an expandable anchoring member actuated by said central tube so as to anchor said closure in said hole while being expanded, and an elastic sealing member also actuated by said central tube so as to seal said hole after anchoring of the same.
    Type: Grant
    Filed: November 9, 1976
    Date of Patent: March 27, 1979
    Assignee: Bergwerksverband GmbH
    Inventors: Walter Benedum, Otto-Ernst Glaesmann, Walter Marsch