Patents by Inventor Alain Libaud

Alain Libaud 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).

  • Gas-insulated circuit-breaker with an integrated electronic current transformer
    Patent number: 6414257
    Abstract: The single-phase circuit-breaker comprises at least one interrupting chamber formed by an insulating tube filled with an insulation gas, and it comprises at least one current transformer whose secondary is disposed in air around the primary at one end of the tube. The primary is at the high voltage electrical potential of the phase and is constituted by an annular metal support. The secondary is subjected to a high voltage electrical potential that is practically equal to the potential of the primary. The current transformer is thus integrated in the circuit-breaker, and the measurement electronics associated with the secondary can be located in air close to the secondary.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: July 2, 2002
    Assignee: Alstom
    Inventors: Bruno Luscan, Alain Libaud, Olivier Grejon
  • Gas-insulated circuit-breaker with an integrated electronic current transformer
    Publication number: 20020036185
    Abstract: The single-phase circuit-breaker comprises at least one interrupting chamber formed by an insulating tube filled with an insulation gas, and it comprises at least one current transformer whose secondary is disposed in air around the primary at one end of the tube. The primary is at the high voltage electrical potential of the phase and is constituted by an annular metal support. The secondary is subjected to a high voltage electrical potential that is practically equal to the potential of the primary. The current transformer is thus integrated in the circuit-breaker, and the measurement electronics associated with the secondary can be located in air close to the secondary.
    Type: Application
    Filed: September 14, 2001
    Publication date: March 28, 2002
    Applicant: ALSTOM
    Inventors: Bruno Luscan, Alain Libaud, Olivier Grejon