Patents by Inventor Sebastien Bigras

Sebastien Bigras 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).

  • Liquid cooling arrangement for electric machines
    Patent number: 8378534
    Abstract: A liquid cooling arrangement for electric machines uses a continuous cooling tube associated with a heat storing element. The cooling tube has a serpentine configuration and the heat storing element includes longitudinal slots starting from both longitudinal ends of the heat storing element. Accordingly, it is possible to slightly deform the heat storing element to properly position it into the internal stator of an electric machine. An internal biasing assembly may be used to force the external surface of the heat storing element to the internal surface of the stator.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: February 19, 2013
    Assignee: TM4 Inc.
    Inventors: Martin Houle, George Bursuc, Sebastien Bigras, Bruno Carpentier
  • Stator assembly for electric machines
    Patent number: 8004142
    Abstract: A stator assembly is provided with detachable teeth that are made of magnetic powder material. The teeth are so configured and sized as to be interconnected to a core body of the stator with pre-formed coils that are positioned between adjacent teeth.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: August 23, 2011
    Assignee: TM4 Inc.
    Inventors: Stephane Poulin, Ruisheng Shi, Sebastien Bigras, Gabriel Rakotonirina, Steve Fleming, Martin Houle
  • Permanent magnet rotor assembly
    Patent number: 7898136
    Abstract: An illustrative embodiment of the present invention is concerned with a permanent magnet rotor for an electric machine provided with an internal stator and a coaxial external rotor. To overcome the drawbacks associated with the use of an adhesive to mount the permanent magnets to the rotor body, permanent magnet spacing and retaining elements are mounted to the inner surface of the rotor, between adjacent magnets.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: March 1, 2011
    Assignee: TM4 Inc.
    Inventors: Stéphane Poulin, Gérald Martin, Sébastien Bigras, Mathieu Guertin, Steve Fleming
  • Liquid Cooling Arrangement for Electric Machines
    Publication number: 20100176669
    Abstract: A liquid cooling arrangement for electric machines uses a continuous cooling tube associated with a heat storing element. The cooling tube has a serpentine configuration and the heat storing element includes longitudinal slots starting from both longitudinal ends of the heat storing element. Accordingly, it is possible to slightly deform the heat storing element to properly position it into the internal stator of an electric machine. An internal biasing assembly may be used to force the external surface of the heat storing element to the internal surface of the stator.
    Type: Application
    Filed: January 12, 2010
    Publication date: July 15, 2010
    Inventors: Martin Houle, George Bursuc, Sebastien Bigras, Bruno Carpentier
  • PERMANENT MAGNET ROTOR ASSEMBLY
    Publication number: 20080197737
    Abstract: An illustrative embodiment of the present invention is concerned with a permanent magnet rotor for an electric machine provided with an internal stator and a coaxial external rotor. To overcome the drawbacks associated with the use of an adhesive to mount the permanent magnets to the rotor body, permanent magnet spacing and retaining elements are mounted to the inner surface of the rotor, between adjacent magnets.
    Type: Application
    Filed: December 12, 2007
    Publication date: August 21, 2008
    Inventors: Stephane Poulin, Gerald Martin, Sebastien Bigras, Mathieu Guertin, Steve Fleming