Patents by Inventor Eliseo DiRusso

Eliseo DiRusso 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 friction secondary seal for face seals
    Patent number: 4580791
    Abstract: Vibration and stability of a primary seal ring 18 is controlled by a secondary seal system 24. An inflatable bladder 26 which forms a portion of secondary seal varies the damping applied to this seal ring.The amplitude of vibration of the primary seal ring 18 is sensed with a proximity probe 34 that is connected to a microprocessor in a control system 32. The bladder pressure is changed by the control system 32 to mitigate any sensed instability or vibration.
    Type: Grant
    Filed: November 16, 1984
    Date of Patent: April 8, 1986
    Assignee: The United States of America as represented by the Administrator, National Aeronautics and Space Administration
    Inventor: Eliseo DiRusso