Patents by Inventor Steven J. Brajkovich

Steven J. Brajkovich 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).

  • Variable orifice using an iris shutter
    Patent number: 4094492
    Abstract: A variable orifice forming mechanism utilizing an iris shutter arrangement adapted to control gas flow, conductance in vacuum systems, as a heat shield for furnace windows, as a beam shutter in sputtering operations, and in any other application requiring periodic or continuously-variable control of material, gas, or fluid flow.
    Type: Grant
    Filed: January 18, 1977
    Date of Patent: June 13, 1978
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Raymond Beeman, Steven J. Brajkovich