Patents by Inventor Guy Pregent

Guy Pregent 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).

  • Field adjustable phase shifting transformer
    Patent number: 6930578
    Abstract: A field-adjustable phase shifting transformer apparatus for canceling harmonic currents in a three-phase alternating current (AC) power distribution system includes a primary having a plurality of sets of contact points for receiving power from a three-phase AC power source and a secondary electromagnetically coupled to the primary, the secondary having a single set of contact points for connection to a plurality of loads. A phase shift is chosen by selecting one of the sets of contacts for connecting the primary to the AC power source.
    Type: Grant
    Filed: February 18, 2003
    Date of Patent: August 16, 2005
    Assignee: Delta Transformers of Canada (1999) Ltd.
    Inventors: Yvan Thibault, Jean-Guy Boudrias, Stéphane Brouillette, Guy Pregent
  • Field adjustable phase shifting transformer
    Publication number: 20040119571
    Abstract: A field-adjustable phase shifting transformer apparatus for canceling harmonic currents in a three-phase alternating current (AC) power distribution system includes a primary having a plurality of sets of contact points for receiving power from a three-phase AC power source and a secondary electromagnetically coupled to the primary, the secondary having a single set of contact points for connection to a plurality of loads. A phase shift is chosen by selecting one of the sets of contacts for connecting the primary to the AC power source.
    Type: Application
    Filed: February 18, 2003
    Publication date: June 24, 2004
    Applicant: DELTA TRANSFORMERS OF CANADA (1999) LTD.
    Inventors: Yvan Thibault, Jean-Guy Boudrias, Stephane Brouillette, Guy Pregent