Patents by Inventor Stephen T. Rader

Stephen T. Rader 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 and apparatus for texturizing tank walls
    Patent number: 6675548
    Abstract: A gantry is constrained to move around the walls of a cylindrical, concrete tank. A rotating, high pressure water spray nozzle is mounted to a moveable platform on the gantry and connected to a source of water at a pressure of over 20,000 psi. The distance between the nozzle and an opposing surface of the wall of the tank is selected so the nozzle can remove the surface of the concrete and produce a selected surface roughness. The platform is moved vertically, with the gantry moving around the tank, so the surface of the concrete is systematically removed and roughened. A shotcrete or gunnite sprayer is then mounted to the platform, and the roughened surface sprayed with shotcrete or gunnite which sticks to the roughened surface. A tensioning head is then mounted to the platform, and wires or cables are tensioned as they are wrapped around the walls.
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: January 13, 2004
    Assignee: DYK Incorporated
    Inventors: Gordon B. Bristol, Robert A. Grogan, Timothy M. Mathews, Stephen T. Rader, James L. Rogers
  • Method and apparatus for texturizing tank walls
    Publication number: 20020187730
    Abstract: A gantry is constrained to move around the walls of a cylindrical, concrete tank. A rotating, high pressure water spray nozzle is mounted to a moveable platform on the gantry and connected to a source of water at a pressure of over 20,000 psi. The distance between the nozzle and an opposing surface of the wall of the tank is selected so the nozzle can remove the surface of the concrete and produce a selected surface roughness. The platform is moved vertically, with the gantry moving around the tank, so the surface of the concrete is systematically removed and roughened. A shotcrete or gunnite sprayer is then mounted to the platform, and the roughened surface sprayed with shotcrete or gunnite which sticks to the roughened surface. A tensioning head is then mounted to the platform, and wires or cables are tensioned as they are wrapped around the walls.
    Type: Application
    Filed: January 11, 2001
    Publication date: December 12, 2002
    Inventors: Gordon B. Bristol, Robert A. Grogan, Timothy M. Mathews, Stephen T. Rader, James L. Rogers