Patents by Inventor Mathieu PREAU
Mathieu PREAU 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).
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Patent number: 12170077Abstract: An acoustic attenuation panel includes a perforated acoustic wall, a first honeycomb structure coupled to the perforated acoustic wall and including a plurality of acoustic cells defined by peripheral partitions, a second honeycomb structure including a plurality of acoustic cells defined by peripheral partitions, and a septum which includes a plurality of macro-perforations and is positioned between the first honeycomb structure and the second honeycomb structure. Each acoustic cell of the first honeycomb structure and each acoustic cell of the at least second honeycomb structure are arranged opposite a single perforation of the septum.Type: GrantFiled: April 8, 2022Date of Patent: December 17, 2024Assignee: Safran NacellesInventors: Marc Versaevel, Bertrand Desjoyeaux, Mathieu Preau
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Publication number: 20240367355Abstract: Tooling for manufacturing an air deflection cascade for a thrust reverser system of an aircraft nacelle includes a plurality of spars, each spar being connected to at least one adjacent spar by a plurality of deflection vanes. The tooling includes at least one molding bar and at least one molding column of a row of vanes, comprising two opposing lateral faces extending along the longitudinal direction of the tooling, and comprising molding cavities. The tooling includes a fixed structure on which the molding bar and the molding column are mounted. The fixed structure enabling a translational movement, along a transverse direction of the tooling, of the molding bar. The tooling includes a compression device to provide the compression of elements made of a composite material arranged in the tooling and intended to form at least one part of the cascade to be manufactured.Type: ApplicationFiled: January 15, 2024Publication date: November 7, 2024Applicant: Safran NacellesInventors: Mathieu PREAU, Bertrand DESJOYEAUX, Franck MAZE, Mickaël SOREL
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Patent number: 11840029Abstract: The present disclosure concerns a method for manufacturing a composite panel including a cellular central core interposed between two skins. The manufacturing method includes the steps of manufacture of an element with a cellular structure comprising a cellular core structure interposed between two layers of structural plies intended to form the skins, positioning of the element with a cellular structure within a mold, formation of drains on either side of the cellular core structure, infusion of the element with a cellular structure so as to impregnate it with a resin, carrying out a draining of the resin through the drains in the element with a cellular structure during the infusion step, the drains having a geometry configured to provide draining, and polymerization of the impregnated element with a cellular structure to form the composite panel.Type: GrantFiled: January 11, 2021Date of Patent: December 12, 2023Assignee: Safran NacellesInventors: Clément Rolland, Jean Baptiste Delarue, Jean Jacques Thomas, Vianney Hus, Mathieu Preau, Alain Roussel
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Patent number: 11719192Abstract: The present disclosure concerns an acoustic attenuation panel for an aircraft turbojet engine nacelle and a method for manufacturing this panel. The acoustic attenuation panel includes an alveolar central core interposed between an acoustic front skin comprising perforations and a rear skin, the acoustic attenuation panel including a front structure and a rear structure. The front structure includes the acoustic front skin and a first network of alveolar walls, the rear structure including the rear skin and a second network of alveolar walls, the first and second networks of alveolar walls being complementary so as to form, in an assembled position, the alveolar central core, the front structure and the rear structure being positioned opposite to each other and so that the network of alveolar walls of a structure is spaced from the skin of the other structure facing it by a clearance d.Type: GrantFiled: November 24, 2020Date of Patent: August 8, 2023Assignee: Safran NacellesInventors: Loïc Hervé André Le Boulicaut, Christophe Thorel, Simon Verger, Mathieu Preau
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Publication number: 20220230613Abstract: An acoustic attenuation panel includes a perforated acoustic wall, a first honeycomb structure coupled to the perforated acoustic wall and including a plurality of acoustic cells defined by peripheral partitions, a second honeycomb structure including a plurality of acoustic cells defined by peripheral partitions, and a septum which includes a plurality of macro-perforations and is positioned between the first honeycomb structure and the second honeycomb structure. Each acoustic cell of the first honeycomb structure and each acoustic cell of the at least second honeycomb structure are arranged opposite a single perforation of the septum.Type: ApplicationFiled: April 8, 2022Publication date: July 21, 2022Applicant: Safran NacellesInventors: Marc VERSAEVEL, Bertrand DESJOYEAUX, Mathieu PREAU
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Publication number: 20210390940Abstract: A method for manufacturing a sound attenuating panel uses an alveolar-core structure including a first edge and a second edge separated by alveolar cells, the alveolar cells including walls extending from the first and second edges and defining a primary conduit for the circulation of a sound wave that is to be attenuated. The method includes covering the first edge or the second edge of the alveolar-core structure with a compartmentation wall; deforming the compartmentation wall to define at least one secondary conduit for the circulation of a sound wave that is to be attenuated, the secondary conduit extending at least partially within said primary conduit; and creating an opening in the compartmentation wall to permit communication between the primary and secondary conduits.Type: ApplicationFiled: August 30, 2021Publication date: December 16, 2021Applicant: Safran NacellesInventors: Bertrand DESJOYEAUX, Marc VERSAEVEL, Mathieu PREAU, Laurent MOREAU
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Publication number: 20210129462Abstract: The present disclosure concerns a method for manufacturing a composite panel including a cellular central core interposed between two skins. The manufacturing method includes the steps of manufacture of an element with a cellular structure comprising a cellular core structure interposed between two layers of structural plies intended to form the skins, positioning of the element with a cellular structure within a mold, formation of drains on either side of the cellular core structure, infusion of the element with a cellular structure so as to impregnate it with a resin, carrying out a draining of the resin through the drains in the element with a cellular structure during the infusion step, the drains having a geometry configured to provide draining, and polymerization of the impregnated element with a cellular structure to form the composite panel.Type: ApplicationFiled: January 11, 2021Publication date: May 6, 2021Applicant: Safran NacellesInventors: Clément ROLLAND, Jean Baptiste DELARUE, Jean Jacques THOMAS, Vianney HUS, Mathieu PREAU, Alain ROUSSEL
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Publication number: 20210102513Abstract: The present disclosure concerns an acoustic attenuation panel for an aircraft turbojet engine nacelle and a method for manufacturing this panel. The acoustic attenuation panel includes an alveolar central core interposed between an acoustic front skin comprising perforations and a rear skin, the acoustic attenuation panel including a front structure and a rear structure. The front structure includes the acoustic front skin and a first network of alveolar walls, the rear structure including the rear skin and a second network of alveolar walls, the first and second networks of alveolar walls being complementary so as to form, in an assembled position, the alveolar central core, the front structure and the rear structure being positioned opposite to each other and so that the network of alveolar walls of a structure is spaced from the skin of the other structure facing it by a clearance d.Type: ApplicationFiled: November 24, 2020Publication date: April 8, 2021Applicant: Safran NacellesInventors: Loïc Hervé André LE BOULICAUT, Christophe THOREL, Simon VERGER, Mathieu PREAU