Patents by Inventor Timothy Robert Louis Derval

Timothy Robert Louis Derval 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 cleaning device
    Patent number: 6880195
    Abstract: A vehicle (210) for travel though a fluid-filled pipe (12) is disclosed, capable of using power derived from the fluid flow to drive the vehicle (210). Certain embodiments have drive means capable of variable pitch in order to adjust the speed and direction of the vehicle in the pipe. Certain embodiments have drive means comprising a helical arm that can vary in pitch and diameter to accommodate different sizes of pipe and/or different rates of travel along the pipe.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: April 19, 2005
    Assignee: P.A.C.T. Engineering (Scotland) Limited
    Inventors: Bijan Bahari, Timothy Robert Louis Derval