Patents by Inventor Stuart J. Malmberg

Stuart J. Malmberg 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).

  • Plasma spray torch with hot anode and gas shroud
    Patent number: 5220150
    Abstract: A gas shrouded plasma torch utilizes a hot anode that has an inert gas passing around the periphery of the anode to provide an inert gas shroud for a plasma stream exiting from the anode. The gas shroud is heated as it passes around the exterior of the hot anode, and when it exits from the passageway and forms a shroud, it mixes with and shields the hot plasma. The arrangement gives the results of less turbulence of the plasma flow, while retaining a high temperature which aids in particle processing.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: June 15, 1993
    Assignee: Regents of the University of Minnesota
    Inventors: Emil Pfender, Stuart J. Malmberg