Patents by Inventor Philippe Vignassa

Philippe Vignassa 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).

  • Exhaust line and motor vehicle equipped therewith
    Patent number: 7328574
    Abstract: The invention concerns an internal combustion engine exhaust line comprising an active noise reduction system with variable choke device, continuously regulated based on the instantaneous discharge rate pulses of exhaust gases exiting from the internal combustion engine, including an expansion chamber for closing phases of the variable choke device arranged upstream of said active noise reduction system and a cavity dispersing medium and high frequencies arranged downstream of the active noise reduction system. The expansion chamber for the closing phases of the variable choke device is integrated in a first depolluting system arranged upstream of said active noise reduction system.
    Type: Grant
    Filed: July 22, 2004
    Date of Patent: February 12, 2008
    Assignees: Renault V.L., Renault S.A.S.
    Inventors: Philippe Vignassa, Franck Le Brazidec
  • Exhaust line and motor vehicle equipped therewith
    Publication number: 20040261404
    Abstract: The invention concerns an internal combustion engine exhaust line comprising an active noise reduction system with variable choke device, continuously regulated based on the instantaneous discharge rate pulses of exhaust gases exiting from the internal combustion engine, including an expansion chamber for closing phases of the variable choke device arranged upstream of said active noise reduction system and a cavity dispersing medium and high frequencies arranged downstream of the active noise reduction system. The expansion chamber for the closing phases of the variable choke device is integrated in a first depolluting system arranged upstream of said active noise reduction system.
    Type: Application
    Filed: July 22, 2004
    Publication date: December 30, 2004
    Applicants: RENAULT V.I., RENAULT S.A.S.
    Inventors: Philippe Vignassa, Franck Le Brazidec