Patents by Inventor Thomas J. Labus

Thomas J. Labus 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).

  • System for pumping fluids at constant pressure
    Patent number: 4373864
    Abstract: A constant pressure system for pumping a coal slurry includes a slurry pump mechanically driven by a hydraulic motor which, in turn, is driven by a hydraulic pump. The output of the hydraulic pump is controlled by a pressure sensitive flow control valve that maintains the hydraulic fluid pressure drop as a constant across the hydraulic motor. The system assures a constant hydraulic motor output torque, driving the slurry pump at a constant delivery pressure.
    Type: Grant
    Filed: March 6, 1980
    Date of Patent: February 15, 1983
    Assignee: CNG Research Company
    Inventors: Lester G. Massey, Robert I. Brabets, William A. Abel, James K. Anderson, Thomas J. Labus, Davis A. George