Patents by Inventor Joël Frelat

Joël Frelat 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).

  • String music instrument and sound board
    Patent number: 8642860
    Abstract: A musical instrument having strings and a soundboard, wherein the soundboard is excited by the strings by a transducer and is associated with differential stiffening mechanism defining at least two zones of the soundboard that present complementary vibratory behaviors. The two zones are separated by a slot extending along a common boundary between the two zones. The transducer extends across the slot so as to be connected to both zones of the soundboard, such that both zones are excited simultaneously when action is taken on one of the strings.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: February 4, 2014
    Assignees: Universite Pierre et Marie Curie (Paris 6), Centre National de la Recherche Scientifique
    Inventors: Charles Besnainou, Adrien Mamou-Mani, Joël Frelat
  • STRING MUSIC INSTRUMENT AND SOUND BOARD
    Publication number: 20120285315
    Abstract: A musical instrument having strings and a soundboard, wherein the soundboard is excited by the strings by a transducer and is associated with differential stiffening mechanism defining at least two zones of the soundboard that present complementary vibratory behaviors. The two zones are separated by a slot extending along a common boundary between the two zones. The transducer extends across the slot so as to be connected to both zones of the soundboard, such that both zones are excited simultaneously when action is taken on one of the strings.
    Type: Application
    Filed: January 14, 2011
    Publication date: November 15, 2012
    Applicants: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE PIERRE ET MARIE CURIE (PARIS 6)
    Inventors: Charles Besnainou, Adrien Mamou-Mani, Joël Frelat
  • Hydraulic system
    Patent number: 8127661
    Abstract: The present invention relates to a hydraulic system that includes a compression chamber capable of being subjected to the pressure of a hydraulic fluid; a piston movable inside the compression chamber along an axis; and at least one sealing gasket disposed between the piston and a wall of the compression chamber, the gasket occupying an axial position that varies circumferentially around the axis in such a manner as to compensate for non-axially symmetrical stresses induced by the pressure of the fluid.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: March 6, 2012
    Assignees: Universite Pierre et Marie Curie, Centre National de la Recherche Scientifique
    Inventors: Stefan Klotz, Gerard Hamel, Joel Frelat
  • HYDRAULIC SYSTEM
    Publication number: 20090091090
    Abstract: The present invention relates to a hydraulic system that includes a compression chamber capable of being subjected to the pressure of a hydraulic fluid; a piston movable inside the compression chamber along an axis; and at least one sealing gasket disposed between the piston and a wall of the compression chamber, the gasket occupying an axial position that varies circumferentially around the axis in such a manner as to compensate for non-axially symmetrical stresses induced by the pressure of the fluid.
    Type: Application
    Filed: December 18, 2006
    Publication date: April 9, 2009
    Applicants: UNIVERSITE PIERRE ET MARIE CURIE (PARIS 6), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Stefan Klotz, Gerard Hamel, Joel Frelat