Patents by Inventor C. L. Scott Harrison

C. L. Scott Harrison 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).

  • Patent number: 4915133
    Abstract: A valve device adapted for insertion at one or more specified locations in a pipe system. The device is adjustable into three positions: in the open position affording normal operation of the pipe system; in a first closed position affording connection of external pressure fluid to the system at one side of the location; and a second closed position affording connection of external pressure fluid to the system at the other side of the location. The device is in the nature of a ball valve with a spherical valve element having means for connecting pressure fluid through the valve housing into the system when the valve is in either of the first and second closed positions.
    Type: Grant
    Filed: March 15, 1989
    Date of Patent: April 10, 1990
    Inventor: C. L. Scott Harrison
  • Patent number: 4760614
    Abstract: A device for displacing or washing out blockages in pipe systems. The device has a central tube which can be closed with a gate valve which thereby isolates the pipe above and below the device. Fluid under pressure is introduced through a three way valve that can be positioned to direct the flow of fluid into the isolated chamber above the gate valve if that is where the blockage is or below the gate valve if the blockage is there.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: August 2, 1988
    Inventor: C. L. Scott Harrison