Patents by Inventor Didier Leblanc

Didier Leblanc 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 of and device for supplying electrical power to a load using a power modulation system including at least one controlled switch and overvoltage counting apparatus
    Patent number: 6813720
    Abstract: The operating mode of a power modulation system is determined according to the nature of the load. The power modulation system can operate in either of two operating modes, namely a “reverse phase control” mode and a “forward phase control” mode. To this end, the load is supplied with power under predetermined low-load operating conditions by the power stage in the “reverse phase control” mode, overvoltages are detected and the power modulation system is caused to change to the “forward phase control” operating mode if an excessive number of overvoltages is detected.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: November 2, 2004
    Assignees: LeGrand, LeGrand SNC
    Inventor: Didier Leblanc
  • Method of and device for supplying electrical power to a load by means of a power modulation system including at least one controlled switch
    Publication number: 20010014949
    Abstract: The operating mode of a power modulation system is determined according to the nature of the load. The power modulation system can operate in either of two operating modes, namely a “reverse phase control” mode and a “forward phase control” mode. To this end, the load is supplied with power under predetermined low-load operating conditions by the power stage in the “reverse phase control” mode, overvoltages are detected and the power modulation system is caused to change to the “forward phase control” operating mode if an excessive number of overvoltages is detected.
    Type: Application
    Filed: December 13, 2000
    Publication date: August 16, 2001
    Inventor: Didier Leblanc
  • Current level detector device for protecting a circuit against alternating current overcurrents
    Patent number: 6252439
    Abstract: A current level detector device for protecting a circuit against alternating current overcurrents includes resistor arrangements that are inserted into the circuit to be protected and two detector cells, one for each half-wave of the current. The detector cells are similar to each other and are connected to the terminals of the resistor arrangements. By means of a crossover circuit, the two detector cells are both connected to the terminals of the same resistor arrangements. Applications include protecting circuits using power semiconductors.
    Type: Grant
    Filed: April 28, 1999
    Date of Patent: June 26, 2001
    Assignees: Legrand, Legrand SNC
    Inventor: Didier Leblanc