Patents by Inventor Pascal Cabrignac

Pascal Cabrignac 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).

  • Power assistance device for an ultrasonic vibration dental handpiece
    Patent number: 6765333
    Abstract: A power assistance device for an ultrasonic dental handpiece (5) includes a working circuit with a parallel impedance (Ls) between the output terminals (S1,S2) and a control circuit with a current transformer (T2), the primary winding (7) thereof is serially arranged in the working circuit and the secondary winding (11) thereof forms an RLC circuit in conjunction with a capacitor (13) and a resistor (15) associated therewith. The voltage of the circuit at the terminals of the resistor (15) is transmitted to the input of a power supply (1). The control circuit enables variations in the value of the capacitor (13) and/or the value of the self-inductance coil of the secondary winding (11) of the transformer (T2).
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: July 20, 2004
    Assignee: Satelec SA
    Inventors: Dominique Mariaucue, Xavier Capet, Pascal Cabrignac