Patents by Inventor Sandy Ritchie

Sandy Ritchie 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).

  • Pipe testing apparatus
    Patent number: 6581642
    Abstract: A pipe testing apparatus comprising an elongate tester body having sealing means and actuator means to deform said sealing means on activation. The apparatus is further provided with means to bias actuator means axially away from the sealing means on deactivation of said actuator means. The apparatus is typically used to test the integrity of pipelines at specific points, for example joints or welds.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: June 24, 2003
    Assignee: Hedley Purvis Limited
    Inventors: Sandy Ritchie, John Horn