Patents by Inventor Edward J. Benford

Edward J. Benford 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).

  • Gasket seal
    Patent number: 4834395
    Abstract: An arcuate concrete section (13) for forming a tunnel has a groove (12) around its edges for accommodating a rectangular frame sealing ring (11) of moulded rubber for sealing adjacent sections (13) together. The sealing ring (11) has a section (FIG. 3) with holes (20, 21, and 22) and grooves (23) for allowing distortion as the concrete sections are forced together edge to edge. At the corner of the sealing ring the section is moulded solid (FIG. 6), but with larger grooves (34) to allow for distortion.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: May 30, 1989
    Inventor: Edward J. Benford