Patents by Inventor Athanasios Chasalevris

Athanasios Chasalevris 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).

  • Supressing vibrations of shafts using adjustable bearings
    Patent number: 11306611
    Abstract: A bearing configured to actively damp vibration of a shaft in a turbine. In one implementation, the bearing can include actuating members that move in a manner that changes properties of fluid, typically a thin film of lubricant, disposed in the bearing to facilitate rotation of the shaft. These changes effectively manipulate the stiffness and damping of the thin film according to a time periodicity that matches a parametric anti-resonance of the bearing. In turn, the resulting interaction of vibrating modes is favorable to damp vibration amplitudes at critical speeds.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: April 19, 2022
    Assignee: Dresser, LLC
    Inventors: Athanasios Chasalevris, Fadi Dohnal
  • SUPRESSING VIBRATIONS OF SHAFTS USING ADJUSTABLE BEARINGS
    Publication number: 20180003075
    Abstract: A bearing configured to actively damp vibration of a shaft in a turbine. In one implementation, the bearing can include actuating members that move in a manner that changes properties of fluid, typically a thin film of lubricant, disposed in the bearing to facilitate rotation of the shaft. These changes effectively manipulate the stiffness and damping of the thin film according to a time periodicity that matches a parametric anti-resonance of the bearing. In turn, the resulting interaction of vibrating modes is favorable to damp vibration amplitudes at critical speeds.
    Type: Application
    Filed: June 28, 2017
    Publication date: January 4, 2018
    Inventors: Athanasios Chasalevris, Fadi Dohnal