Patents by Inventor Denis Sirac

Denis Sirac 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).

  • Publication number: 20240266577
    Abstract: The invention relates to a fuel cell having a stack of a plurality of cells, the stack being sandwiched between a first clamping plate and a second clamping plate, the fuel cell having a first flat seal and a distribution plate, the distribution plate comprising a first collection face, the first collection face and/or the first clamping plate having an annular lip arranged so as to clamp the first flat seal.
    Type: Application
    Filed: April 26, 2022
    Publication date: August 8, 2024
    Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l’Exploitation des Procedes Georges Claude
    Inventors: Johan ANDRE, Denis SIRAC
  • Publication number: 20240266560
    Abstract: The invention relates to an assembly comprising a stack of a plurality of fuel cell cells, the plurality comprising a first cell at a first end of the stack and a last cell at a second end of the stack, each cell comprising an anode plate and a cathode plate, each plate comprising a reactive face and a cooling face, one of the plates of the last cell forming, with one of the plates of another of the cells, a last inter-cell cooling circuit, the other of the plates of the last cell forming a last end plate, the assembly comprising a closure plate comprising an electric current collection face and a closure face fixed to the cooling face of the last end plate.
    Type: Application
    Filed: April 1, 2022
    Publication date: August 8, 2024
    Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l’Exploitation des Procedes Georges Claude
    Inventors: Denis SIRAC, Johan ANDRE
  • Publication number: 20240186536
    Abstract: The invention relates to a bipolar plate for a fuel cell stack or an electrolyzer stack, which bipolar plate comprises an anode plate and a cathode plate assembled to each other, facing each other, the face of the anode plate opposite the face of the cathode plate defining an internal space forming a circuit for distributing a first fluid, the anode plate and the cathode plate having distinct dimensions such that at least a portion of the peripheral end of the anode plate and at least a portion of the peripheral end of the cathode plate are offset relative to each other in the plane of the bipolar plate, forming a shoulder at a peripheral end of the bipolar plate.
    Type: Application
    Filed: April 8, 2021
    Publication date: June 6, 2024
    Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l’Exploitation des Procedes Georges Claude
    Inventors: Johan ANDRE, Denis SIRAC
  • Publication number: 20240183047
    Abstract: A bipolar plate for a fuel cell stack or for an electrolyzer stack, having an anode plate and a cathode plate which are joined to face-to-face. Wherein the face of the anode plate that faces the face of the cathode plate delimits an internal space that forms a circuit for the distribution of a first fluid, thereby forming a bipolar plate. Wherein the first opening and the second opening facing one another thereby forming a collector configured to enable the passage of the first fluid or a second fluid through the bipolar plate. Wherein the first opening and the second opening have distinct dimensions such the peripheral end of the first opening and the peripheral end of the second opening are offset in relation to one another in the plane of the bipolar plate, forming a shoulder at the peripheral end of the collector.
    Type: Application
    Filed: March 10, 2022
    Publication date: June 6, 2024
    Inventors: Denis SIRAC, Johan ANDRE
  • Publication number: 20240105967
    Abstract: The invention relates to a bipolar plate for a fuel cell stack that extends in a vertical plane in the use position, the plate comprising opposed first and second transverse edges, upper and lower longitudinal edges, a central region arranged between the edges, a first opening for a heat transfer fluid inlet, a second opening for heat transfer fluid collection a third opening for an oxidant inlet, a fourth opening for oxidant collection, a fifth opening for the inlet of a fuel, a sixth opening for fuel collection, wherein the first, third and sixth openings are arranged in the first transverse edge and are arranged axially in relation to one another, the second, fourth and fifth openings are arranged in the second transverse edge and are arranged axially in relation to one another, and, in the vertical position of use of the plate: the sixth opening are arranged below the first and third openings, the fourth opening is arranged below the second and fifth openings, and the second opening is arranged above the
    Type: Application
    Filed: November 17, 2023
    Publication date: March 28, 2024
    Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l’Exploitation des Procedes Georges Claude
    Inventors: Johan ANDRE, Camille BOUVIER, Eric CLAUDE, Nicolas JANNIN, Denis SIRAC, Didier ZAEPFFEL
  • Publication number: 20210119227
    Abstract: The invention relates to a bipolar plate for a fuel cell stack that extends in a vertical plane in the use position, the plate comprising opposed first and second transverse edges, upper and lower longitudinal edges, a central region arranged between the edges, a first opening for a heat transfer fluid inlet, a second opening for heat transfer fluid collection a third opening for an oxidant inlet, a fourth opening for oxidant collection, a fifth opening for the inlet of a fuel, a sixth opening for fuel collection, wherein the first, third and sixth openings are arranged in the first transverse edge and are arranged axially in relation to one another, the second, fourth and fifth openings are arranged in the second transverse edge and are arranged axially in relation to one another, and, in the vertical position of use of the plate: the sixth opening are arranged below the first and third openings, the fourth opening is arranged below the second and fifth openings, and the second opening is arranged above the
    Type: Application
    Filed: September 28, 2020
    Publication date: April 22, 2021
    Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Johan ANDRE, Camille BOUVIER, Eric CLAUDE, Nicolas JANNIN, Denis SIRAC, Didier ZAEPFFEL
  • Patent number: 9601786
    Abstract: Leakproofing device for a fuel cell intended to be interposed between an Electrodes Membrane Assembly and a polar or bipolar plate of a fuel cell unit, the device consisting of a rigid frame and of a leakproofing seal integral with the frame, the frame furnished with the leakproofing seal defining a plurality of apertures through the device, the apertures being delimited by the leakproofing seal.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: March 21, 2017
    Assignee: L'Air Liquide Société Anonyme Pour L'Étude Et L'Exploitation Des Procedes Georges Claude
    Inventors: Arnaud Cerceau, Alain Guinebert, Nicolas Jannin, Elisabeth Rossinot, Helene Trouve, Denis Sirac
  • Publication number: 20150263360
    Abstract: Leakproofing device for a fuel cell intended to be interposed between an Electrodes Membrane Assembly and a polar or bipolar plate of a fuel cell unit, the device consisting of a rigid frame and of a leakproofing seal integral with the frame, the frame furnished with the leakproofing seal defining a plurality of apertures through the device, the apertures being delimited by the leakproofing seal.
    Type: Application
    Filed: October 2, 2013
    Publication date: September 17, 2015
    Inventors: Arnaud Cerceau, Alain Guinebert, Nicolas Jannin, Elisabeth Rossinot, Helene Trouve, Denis Sirac
  • Patent number: 7968040
    Abstract: Method for fabricating a fluid connector for fuel cell system: (a) a thermoplastic parison (19) is extruded, (b) the parison is placed in a mould (10a, 10b), (c) an intermediate zone is created, in which the two walls of the parison are joined in a gastight manner, (d) a gas is blown inside the parison into each cavity of the mould, and (e) the mould is opened.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: June 28, 2011
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Xavier Roussin-Bouchard, Denis Sirac, Nancy Clary
  • Publication number: 20090104504
    Abstract: Method for fabricating a fluid connector for fuel cell system: (a) a thermoplastic parison (19) is extruded, (b) the parison is placed in a mould (10a, 10b), (c) an intermediate zone is created, in which the two walls of the parison are joined in a gastight manner, (d) a gas is blown inside the parison into each cavity of the mould, and (e) the mould is opened.
    Type: Application
    Filed: August 4, 2008
    Publication date: April 23, 2009
    Applicant: L'Air Liquide Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
    Inventors: Xavier ROUSSIN-BOUCHARD, Denis SIRAC, Nancy CLARY