Patents by Inventor Joh McCaskill

Joh McCaskill 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).

  • Solids strainer system for a hydraulic choke
    Publication number: 20050006150
    Abstract: The invention contemplates a strainer based upon a four-way, two-position rotary cylindrical plug valve having a hollow plug. The normal entry port for the sealing plug of the plug valve is a circular radial hole passing from the exterior of the plug into the interior cavity of the plug. The normal exit port for the sealing plug is a regular array of small holes across from and coaxial with the normal entry hole. The ports for the valve body are in two pairs positioned at 90° from each other, with the axes of the ports lying in the same transverse plane as the ports of the valve plug.
    Type: Application
    Filed: June 30, 2004
    Publication date: January 13, 2005
    Applicant: Power Chokes, L.P.
    Inventors: Donald Sims, Michael Taylor, Robert Schmidt, David Schmidt, Joh McCaskill