Patents by Inventor Tony A. Wall

Tony A. Wall 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).

  • ABS manhole adapter serving as a coupling-collar of a resilient connector assembly used in making a connection between a precast reinforced concrete manhole and a PVC sewer pipe
    Patent number: 5261761
    Abstract: When a PVC sewer pipe is to be connected to a precast reinforced concrete manhole at a designated hole location thereof, this designated hole is made large enough to later accommodate grout and an inserted end of the PVC sewer pipe, on which an ABS manhole adapter is pre-positioned. This ABS manhole adapter serves as a coupling-collar, around which the grout is placed, as the grout is used to fill the remaining volume of the designated hole, thereby completing the resilient connector assembly used in making this connection between the precast reinforced concrete manhole and the PVC sewer pipe.
    Type: Grant
    Filed: April 28, 1992
    Date of Patent: November 16, 1993
    Inventors: James H. Knappert, Tony A. Wall, Steven W. Elliot