Patents by Inventor Allan J. Prang

Allan J. Prang 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: 6457950
    Abstract: A pump is disclosed, including a motor and a pump housing, for pumping mixed gas and liquid. The pump includes two intermeshed screw members for providing progressive cavities for transporting mixed fluids, within a pumping cavity, from a suction passage to a discharge reservoir of the pump housing. It further uses pumped product to provide cooling and lubrication to the motor and to bearings and timing gears of the screw members. By using pumped product for lubrication and cooling, the need for seals is eliminated, thereby reducing the need for maintenance. This makes the pump package advantageous for subsea deployment for use in pumping nearly depleted wells which may be manifolded together to provide adequate product flow.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: October 1, 2002
    Assignee: Flowserve Management Company
    Inventors: Paul Cooper, Allan J. Prang