Patents by Inventor Frederic Andre Henri Beroul

Frederic Andre Henri Beroul 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).

  • Method and device for reducing the effect of the vibration generated by the driveline of a helicopter
    Patent number: 5895012
    Abstract: Method for reducing the effect of the vibration generated by the driveline of a helicopter. The helicopter includes at least one rotor, the collective pitch of the blades of which can be controlled by a control system. The values of at least one parameter representing the effect of the vibration generated by the driveline are measured. A control signal for the collective pitch of the blades of the rotor is directly formed from the measured values of the parameter. The control signal to the system for controlling the collective pitch of the blades of the rotor generates a set of forces and of moments which oppose the effect of the vibration generated by the driveline. The control signal thus formed is applied to the system for controlling the collective pitch of blades of the rotor.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: April 20, 1999
    Assignee: Eurocopter France
    Inventors: Thomasz Krysinski, Frederic Andre Henri Beroul