Patents by Inventor Herman J. Spruijt

Herman J. Spruijt 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).

  • Electric converter with several induction coils
    Patent number: 5257170
    Abstract: An electric converter comprising at least three reactive elements (1, 2, 3) connected in series, and a switching device comprising a switching transistor (4) and a diode (5), the switching transistor operating at a high frequency so that it becomes conductive for a fraction of each period of said frequency. The transistor (4) and the diode (5) are connected to the connection points (12, 13) between the reactive elements (1, 2, 3) so that the diode (5) is conductive only when the transistor (4) is non-conductive and so that it is non-conductive each time the transistor (4) becomes conductive. This device is used to control the electric current from a DC power supply to a load.
    Type: Grant
    Filed: March 25, 1991
    Date of Patent: October 26, 1993
    Assignee: Agence Spatiale Europeenne
    Inventor: Herman J. Spruijt