Patents by Inventor Edward M. Greitzer

Edward M. Greitzer 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).

  • Passive structural and aerodynamic control of compressor surge
    Patent number: 5199856
    Abstract: A compressor or pump is connected to a discharge plenum. The plenum includes a movable wall whose motion varies the volume of the plenum. The wall is connected to passive elements forming a spring-mass-damper system whose characteristics are selected to damp pressure fluctuations in the plenum which would give rise to pumping system instabilities. In another aspect of the invention, a compressor is connected to a discharge plenum which in turn is connected to an exit throttle. The throttle includes a movable portion whose motion varies the throttle area. The movable portion is connected to passive elements forming a spring-mass-damper system selected to damp pressure fluctuations in the plenum. In another embodiment, the plenum communicates with a fixed area throttle and a variable area throttle. The variable area throttle includes a movable portion connected to passive elements selected to damp pressure fluctuations in the plenum.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: April 6, 1993
    Assignee: Massachusetts Institute of Technology
    Inventors: Alan H. Epstein, Edward M. Greitzer, Daniel L. Gysling, John Dugundji, Gerald R. Guenette