Patents by Inventor Ramzi BOHLI
Ramzi BOHLI 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: 11975383Abstract: A moulding device (1) for moulding a material around a core (2), comprising a hollow moulding enclosure (3) suitable for receiving the core (2), and means for controlling the shape of the core (2) in the hollow enclosure (3), the control means comprising means for deforming the core (2). The control means further comprise force control means and a control unit (8) suitable for actuating the deformation means in accordance with information provided by the force control means.Type: GrantFiled: March 24, 2020Date of Patent: May 7, 2024Assignee: SAFRANInventors: David Grange, Ramzi Bohli
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Patent number: 11717880Abstract: A method for forming a wax model for the manufacture of turbine blades by lost-wax casting, in which a core is provided, a lower surface shell and an upper surface shell are positioned and bonded on either side of ducts of the core adjacent to the root, the core equipped with the lower surface shell and with the upper surface shell is positioned in an injection mold, wax is injected around the core equipped with the lower surface shell and with the upper surface shell, so as to form a wax model including a blade airfoil and a blade root including a fir tree, the lower surface shell and the upper surface shell being positioned around the core so as to form a portion of the fir tree of the wax model.Type: GrantFiled: June 3, 2020Date of Patent: August 8, 2023Assignee: SAFRANInventors: Ramzi Bohli, Mirna Bechelany, Didier Dangeul, Didier Maurice Marceau Guerche, Alain Armel Le Hegarat, Ngadia Taha Niane
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Patent number: 11618071Abstract: A core for the foundry of an aeronautical part such as a turbine blade, the core being intended to be disposed in an inner housing defined by a mold, the core comprising a body intended to form the internal shape of the turbine blade, an impact portion, disposed on at least a portion of the periphery of the body so as to break a fluid jet when filling the inner housing with the fluid, the impact portion comprising a top and at least one deflection wall converging towards the top.Type: GrantFiled: April 12, 2019Date of Patent: April 4, 2023Assignee: SAFRANInventors: Adrien Bernard Vincent Rollinger, Ramzi Bohli, Ngadia Taha Niane, Alain Armel Le Hegarat, Romain Pierre Cariou, David Grange, Didier Maurice Marceau Guerche
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Publication number: 20220314304Abstract: A method for forming a wax model for the manufacture of turbine blades by lost-wax casting, in which a core is provided, a lower surface shell and an upper surface shell are positioned and bonded on either side of ducts of the core adjacent to the root, the core equipped with the lower surface shell and with the upper surface shell is positioned in an injection mold, wax is injected around the core equipped with the lower surface shell and with the upper surface shell, so as to form a wax model including a blade airfoil and a blade root including a fir tree, the lower surface shell and the upper surface shell being positioned around the core so as to form a portion of the fir tree of the wax model.Type: ApplicationFiled: June 3, 2020Publication date: October 6, 2022Applicant: SAFRANInventors: Ramzi BOHLI, Mirna BECHELANY, Didier DANGEUL, Didier Maurice Marceau GUERCHE, Alain Armel LE HEGARAT, Ngadia Taha NIANE
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Publication number: 20220176441Abstract: The invention relates to a moulding device (1) for moulding a material around a core (2), comprising a hollow moulding enclosure (3) suitable for receiving the core (2), and means for controlling the shape of the core (2) in the hollow enclosure (3), the control means comprising means for deforming the core (2). The control means further comprise force control means and a control unit (8) suitable for actuating the deformation means in accordance with information provided by the force control means.Type: ApplicationFiled: March 24, 2020Publication date: June 9, 2022Applicant: SAFRANInventors: David GRANGE, Ramzi BOHLI
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Patent number: 11332411Abstract: A method for producing a consolidated fiber preform intended for the manufacture of a part made of composite material, includes shaping a fiber texture in a heated metal mold, the texture being pre-impregnated with a transient or fugitive material, or shaping a fiber texture in a metal mold and injecting a transient or fugitive material into the fiber texture held in shape in the metal mold, cooling the mold, removing the set fiber preform from the mold, coating the fiber preform with a slurry containing a powder of ceramic or carbon particles, heat-treating the coated fiber preform so as to form a porous shell around the fiber preform by consolidation of the slurry and so as to remove the transient or fugitive material present in the fiber preform, consolidating the fiber preform by gas-phase chemical infiltration.Type: GrantFiled: March 5, 2018Date of Patent: May 17, 2022Assignees: SAFRAN, SAFRAN CERAMICSInventors: Thierry Guy Xavier Tesson, Maxime François Roger Carlin, Simon Thibaud, Rémy Dupont, Ramzi Bohli
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Publication number: 20210138533Abstract: A core for the foundry of an aeronautical part such as a turbine blade, the core being intended to be disposed in an inner housing defined by a mold, the core comprising a body intended to form the internal shape of the turbine blade, an impact portion, disposed on at least a portion of the periphery of the body so as to break a fluid jet when filling the inner housing with the fluid, the impact portion comprising a top and at least one deflection wall converging towards the top.Type: ApplicationFiled: April 12, 2019Publication date: May 13, 2021Applicant: SAFRANInventors: Adrien Bernard Vincent ROLLINGER, Ramzi BOHLI, Ngadia Taha NIANE, Alain Armel LE HEGARAT, Romain Pierre CARIOU, David GRANGE, Didier Maurice Marceau GUERCHE
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Patent number: 10875084Abstract: A cluster model and a shell for the production, by lost wax casting, of a plurality of turbomachine elements, are provided. The shell includes a central sprue that is fluidly connected to a casting cup for receiving molten metal; a plurality of shell elements; a plurality of bottom feed conduits for the shell elements; and a handling accessory shell that is independent of the plurality of shell elements and of their metal supply circuit, such that there is no fluid connection to the shell elements. The handling accessory shell is fluidly connected to the central sprue so as to allow top-pour casting of the handling accessory shell.Type: GrantFiled: December 22, 2017Date of Patent: December 29, 2020Assignees: SAFRAN, SAFRAN AIRCRAFT ENGINESInventors: Ngadia Taha Niane, Ramzi Bohli, Loic Galvin, Said Boukerma
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Publication number: 20200370170Abstract: A method for producing a consolidated fiber preform intended for the manufacture of a part made of composite material, includes shaping a fiber texture in a heated metal mold, the texture being pre-impregnated with a transient or fugitive material, or shaping a fiber texture in a metal mold and injecting a transient or fugitive material into the fiber texture held in shape in the metal mold, cooling the mold, removing the set fiber preform from the mold, coating the fiber preform with a slurry containing a powder of ceramic or carbon particles, heat-treating the coated fiber preform so as to form a porous shell around the fiber preform by consolidation of the slurry and so as to remove the transient or fugitive material present in the fiber preform, consolidating the fiber preform by gas-phase chemical infiltration.Type: ApplicationFiled: March 5, 2018Publication date: November 26, 2020Inventors: Thierry Guy Xavier TESSON, Maxime François Roger CARLIN, Simon THIBAUD, Rémy DUPONT, Ramzi BOHLI
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Patent number: 10835951Abstract: The invention provides a method of assembling together a first core (12) and a second core (14) in order to make a non-permanent model configured for use in lost wax molding to form a part having a first cavity and a second cavity corresponding respectively to the first core and to the second core. The invention is characterized by the fact that the first and second cores (12, 14) are assembled together with a first spacer (20), the first spacer (20) being arranged between the first and second cores.Type: GrantFiled: July 27, 2017Date of Patent: November 17, 2020Assignees: Safran, Safran Aircraft EnginesInventors: Adrien Bernard Vincent Rollinger, Mathieu Jean Luc Vollebregt, Joseph Toussaint Tami Lizuzu, Vincent Marc Herb, Didier Maurice Marceau Guerche, Ramzi Bohli
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Publication number: 20200101526Abstract: A cluster model and a shell for the production, by lost wax casting, of a plurality of turbomachine elements, are provided. The shell includes a central sprue that is fluidly connected to a casting cup for receiving molten metal; a plurality of shell elements; a plurality of bottom feed conduits for the shell elements; and a handling accessory shell that is independent of the plurality of shell elements and of their metal supply circuit, such that there is no fluid connection to the shell elements. The handling accessory shell is fluidly connected to the central sprue so as to allow top-pour casting of the handling accessory shell.Type: ApplicationFiled: December 22, 2017Publication date: April 2, 2020Applicants: SAFRAN, SAFRAN AIRCRAFT ENGINESInventors: Ngadia Taha NIANE, Ramzi BOHLI, Loic GALVIN
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Patent number: 10562093Abstract: A feed system for conveying a molten metal that is to make a casting, the system including a feed channel made of ceramic material that is configured to enable the molten metal to flow by gravity inside the feed channel, the feed channel having a first portion extending in a first direction, and at least one second portion extending in a second direction different from the first direction, the second portion being arranged downstream from the first portion and being connected to the first portion by a junction. The system further includes a damping channel having a first end opening out into the junction and a second end that is closed, the damping channel extending the first portion of the feed channel.Type: GrantFiled: May 10, 2017Date of Patent: February 18, 2020Assignees: SAFRAN, SAFRAN AIRCRAFT ENGINESInventors: Ramzi Bohli, Ngadia Taha Niane, David Grange, Didier Maurice Marceau Guerche, Saïd Boukerma
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Publication number: 20190184451Abstract: A feed system for conveying a molten metal that is to make a casting, the system including a feed channel made of ceramic material that is configured to enable the molten metal to flow by gravity inside the feed channel, the feed channel having a first portion extending in a first direction, and at least one second portion extending in a second direction different from the first direction, the second portion being arranged downstream from the first portion and being connected to the first portion by a junction. The system further includes a damping channel having a first end opening out into the junction and a second end that is closed, the damping channel extending the first portion of the feed channel.Type: ApplicationFiled: May 10, 2017Publication date: June 20, 2019Inventors: Ramzi BOHLI, Ngadia Taha NIANE, David GRANGE, Didier Maurice Marceau GUERCHE, Saïd BOUKERMA
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Publication number: 20190160524Abstract: The invention provides a method of assembling together a first core (12) and a second core (14) in order to make a non-permanent model configured for use in lost wax molding to form a part having a first cavity and a second cavity corresponding respectively to the first core and to the second core. The invention is characterized by the fact that the first and second cores (12, 14) are assembled together with a first spacer (20), the first spacer (20) being arranged between the first and second cores.Type: ApplicationFiled: July 27, 2017Publication date: May 30, 2019Applicants: Safran, Safran Aircraft EnginesInventors: Adrien Bernard Vincent ROLLINGER, Mathieu Jean Luc VOLLEBREGT, Joseph Toussaint TAMI LIZUZU, Vincent Marc HERB, Didier Maurice Marceau GUERCHE, Ramzi BOHLI