Patents by Inventor Yvan Rappart
Yvan Rappart 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: 11897816Abstract: A process for manufacturing a part made of a ceramic matrix composite material, includes coating an outer surface of a porous preform with a layer of a fugitive material to form a model of the part to be obtained, the fugitive material being wax or resin, the fugitive material layer in the model not exceeding the highest peak of surface undulations of the preform, and ceramic and/or carbon particles being present in the porosity of the preform, coating the model formed with a ceramic powder composition, heat treating the coated model to remove the fugitive material and form a ceramic shell mold by sintering of the ceramic powder composition, introducing a molten composition including silicon into the shell mold to obtain the part in the shell mold, the molten composition infiltrating the porosity of the preform to form the ceramic matrix, and separating the shell mold from the part obtained.Type: GrantFiled: May 15, 2019Date of Patent: February 13, 2024Assignees: SAFRAN, SAFRAN CERAMICS, SAFRAN AIRCRAFT ENGINESInventors: Michaël Podgorski, Bruno Jacques Gérard Dambrine, Emilie Chantal Gisèle Mendez, Wen Zhang, Yvan Rappart, Charles Leleu
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Publication number: 20210078913Abstract: A process for manufacturing a part made of a ceramic matrix composite material, includes coating an outer surface of a porous preform with a layer of a fugitive material to form a model of the part to be obtained, the fugitive material being wax or resin, the fugitive material layer in the model not exceeding the highest peak of surface undulations of the preform, and ceramic and/or carbon particles being present in the porosity of the preform, coating the model formed with a ceramic powder composition, heat treating the coated model to remove the fugitive material and form a ceramic shell mold by sintering of the ceramic powder composition, introducing a molten composition including silicon into the shell mold to obtain the part in the shell mold, the molten composition infiltrating the porosity of the preform to form the ceramic matrix, and separating the shell mold from the part obtained.Type: ApplicationFiled: May 15, 2019Publication date: March 18, 2021Inventors: Michaël PODGORSKI, Bruno Jacques Gérard DAMBRINE, Emilie Chantal Gisèle MENDEZ, Wen ZHANG, Yvan RAPPART, Charles LELEU
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Patent number: 10717128Abstract: A method for manufacturing a metal component using lost-wax casting is provided. The component is made of, for example, nickel alloy, with a columnar or monocrystalline structure with at least one cavity of elongate shape. The method includes creating a wax model of the component with a ceramic core corresponding to the cavity, creating a shell mold around the model, placing the mold in a furnace, with the base standing on the sole of the furnace, pouring molten alloy into the shell mold, solidifying the poured metal by gradual cooling from the sole in a direction of propagation.Type: GrantFiled: January 13, 2014Date of Patent: July 21, 2020Assignee: SAFRAN AIRCRAFT ENGINESInventors: Yvan Rappart, Christelle Berthelemy, Benoît Georges Jocelyn Marie, David Locatelli, Sébastien Digard Brou De Cuissart
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Patent number: 10471500Abstract: A stack molding pattern and a shell for manufacturing aircraft turbine engine blades via lost wax casting. The stack molding shell includes a plurality of shell blade elements, each intended for producing a blade, wire elements being arranged within the shell blade elements; and a metal feeder including a plurality of metal outlets, each one radially open towards one of the shell blade elements and connected with the second end portion of the element. The shell includes a protective screen, associated with each second end portion and intended to protect a sensitive portion of the wire elements against the direct impact of a flow of metal from the feeder. The sensitive portion is located in the second end portion, downstream from the protective screen.Type: GrantFiled: October 12, 2015Date of Patent: November 12, 2019Assignee: SAFRAN AIRCRAFT ENGINESInventors: Roland Tran, Eric Eberschveiler, Anthony Le Fay, Patrick Pourfilet, Yvan Rappart, Monique Tirel
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Publication number: 20170239712Abstract: A stack molding pattern and a shell for manufacturing aircraft turbine engine blades via lost wax casting. The stack molding shell includes a plurality of shell blade elements, each intended for producing a blade, wire elements being arranged within the shell blade elements; and a metal feeder including a plurality of metal outlets, each one radially open towards one of the shell blade elements and connected with the second end portion of the element. The shell includes a protective screen, associated with each second end portion and intended to protect a sensitive portion of the wire elements against the direct impact of a flow of metal from the feeder. The sensitive portion is located in the second end portion, downstream from the protective screen.Type: ApplicationFiled: October 12, 2015Publication date: August 24, 2017Applicant: SAFRAN AIRCRAFT ENGINESInventors: Roland TRAN, Eric EBERSCHVEILER, Anthony LE FAY, Patrick POURFILET, Yvan RAPPART, Monique TIREL
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Patent number: 9694421Abstract: A method including preheating a set of N shell molds for lost-wax casting, where the method can comprise: individually charging shell molds into n unit electric furnaces, each of which has previously been preheated to an initial loading temperature; starting a predefined preheating cycle for each shell mold charged in the unit electric furnaces, with a preheating cycle comprising raising the temperature of the furnace in compliance with a predefined ramp up to a predetermined setpoint temperature, and holding the furnace at the setpoint temperature for a predetermined duration; and at the end of each preheating cycle, unloading the shell mold in question and repeating the two preceding operations for another non-preheated shell mold.Type: GrantFiled: January 14, 2015Date of Patent: July 4, 2017Assignee: SNECMAInventors: Patrick Albert Calero, Bernard Louis Lallement, Serge Tenne, Yvan Rappart
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Publication number: 20150352634Abstract: A method for manufacturing a metal component using the lost-wax casting method is provided. The component is made of nickel alloy, with a columnar or monocrystalline structure with at least one cavity of elongate shape. The method includes creating a wax model of the component with a ceramic core corresponding to said cavity, the ceramic core comprising a first land for holding at one longitudinal end and a second land for holding at the opposite end, creating a shell mold around the model, the mold comprising a base and the first land of the core being at the same end as the base, placing the mold in a furnace, with the base standing on the sole of the furnace, pouring the said molten alloy into the shell mold, solidifying the poured metal by gradual cooling from the sole in a direction of propagation.Type: ApplicationFiled: January 13, 2014Publication date: December 10, 2015Applicant: SNECMAInventors: Yvan Rappart, Christelle Berthelemy, Benoît Georges Jocelyn Marie, David Locatelli, Sébastien Digard Brou De Cuissart
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Publication number: 20150209861Abstract: The invention relates to a method of preheating a set of N shell molds (12) for lost-wax casting, the method comprising the following successive steps: individually charging shell molds into n unit electric furnaces (100), each of which has previously been preheated to an initial loading temperature; starting a predefined preheating cycle for each shell mold charged in the unit electric furnaces, with a preheating cycle comprising raising the temperature of the furnace in compliance with a predefined ramp up to a predetermined setpoint temperature, and holding the furnace at the setpoint temperature for a predetermined duration; and at the end of each preheating cycle, unloading the shell mold in question and repeating the two preceding steps for another non-preheated shell mold.Type: ApplicationFiled: January 14, 2015Publication date: July 30, 2015Applicant: SNECMAInventors: Patrick Albert CALERO, Bernard Louis LALLEMENT, Serge TENNE, Yvan RAPPART
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Patent number: 5159970Abstract: A method of making a shell mould, particularly for a lost wax casting operation, includes the deposition of an adhesion agent on the pattern before the deposition of layers of ceramic material to build up the mould. The adhesion agent used is preferably a 3% solution of aminosilane in a solvent consisting of ethanol and ethyl acetate in amounts from 25% to 75% of the solvent. The method avoids the phenomenon of detachment at the pattern/ceramic interface.Type: GrantFiled: July 20, 1990Date of Patent: November 3, 1992Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."Inventors: Nadine Burkarth, Christian Marty, Yvan Rappart