Patents by Inventor Robert D. Porteous

Robert D. Porteous 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).

  • Construction of tunnels or pipes for use in civil engineering works
    Patent number: 4815895
    Abstract: A tunnel or pipe section which includes a plurality of panels which are connected together to form a closed tunnel or pipe section. Each panel includes a plurality of tubular connectors which are anchored within the panel, preferably to the reinforcing members of the concrete panels, and which are connected to one another, such as by bolting through apertures in walls of the aligned connectors.
    Type: Grant
    Filed: November 18, 1986
    Date of Patent: March 28, 1989
    Assignee: International Manufacturing Pty. Ltd.
    Inventors: Ronald Purssey, Robert D. Porteous