Patents by Inventor Bernard J. P. Nayrole

Bernard J. P. Nayrole 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).

  • Active acoustic sound absorber device
    Patent number: 4177874
    Abstract: The invention relates to active acoustic absorber devices for absorbing the sounds which are emitted by a emitter source and which propagate therefrom, along a pipe. An absorber according to the invention comprises an acoustic tripole which is composed of two auxiliary acoustic sources which constitute a dipole and of a third auxiliary source which constitutes a unipole, these three sources being located in the same acoustic chamber, which chamber is disposed outside the pipe, opens therein through three orifices aligned parallel to the longitudinal axis of the pipe and comprises a transverse plane of symmetry perpendicular to the axis of the pipe.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: December 11, 1979
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventors: Theophile A. Angelini, Bernard J. P. Nayrole, Maurice J. Jessel, Georges Canevet, Gerard A. Mangiante, Bernard Carbone