Patents by Inventor Frédéric Leman
Frédéric Leman 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: 8475134Abstract: The method consists in depositing, by alumina spraying, an electrically insulating sublayer on the substrate, then in placing the sensor on the electrically insulating sublayer and finally in depositing, by alumina spraying, a cover layer on the sensor and the electrically insulating sublayer. It further includes, before the cover layer is deposited, a step in which an impermeable and thermally insulating cement is applied locally on wires of the sensor.Type: GrantFiled: October 6, 2009Date of Patent: July 2, 2013Assignee: SNECMAInventors: Charly Buleon, Frederic Leman, Etienne Tulie
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Patent number: 7950139Abstract: The invention relates to a method of depositing a coating on a part having its surface made of silicon carbide. The method comprises the following steps: a) applying laser treatment to the SiC surface by superposing laser impacts for the purpose of increasing the roughness of said surface; and b) depositing a coating on the SiC surface by atmospheric thermal spraying. The invention also provides a device for measuring deformation, which device comprises a first alumina coating obtained by atmospheric thermal spraying onto the silicon carbide layer covering the substrate of the part after it has been treated by superposing laser impacts, a free filament strain gauge placed on the coating, and an additional alumina coating obtained by atmospheric thermal spraying onto the strain gauge.Type: GrantFiled: April 24, 2008Date of Patent: May 31, 2011Assignee: SNECMAInventors: Frederic Leman, Sebastien Lukat, Sophie Costil, Christian Coddet
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Publication number: 20100173150Abstract: The method consists in depositing, by alumina spraying, an electrically insulating sublayer on the substrate, then in placing the sensor on the electrically insulating sublayer and finally in depositing, by alumina spraying, a cover layer on the sensor and the electrically insulating sublayer. It further includes a step of densifying, by localized remelting, of the alumina coating on the surface of the cover layer.Type: ApplicationFiled: October 1, 2009Publication date: July 8, 2010Applicant: SNECMAInventors: Charly BULEON, Frédéric Leman, Etienne Tulie
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Publication number: 20100104795Abstract: The method consists in depositing, by alumina spraying, an electrically insulating sublayer on the substrate, then in placing the sensor on the electrically insulating sublayer and finally in depositing, by alumina spraying, a cover layer on the sensor and the electrically insulating sublayer. It further includes a capillary impregnation step by means of an impregnant, so as to block the pores and microcracks on the surface of the cover layer or even through the entire thickness of the deposited alumina coatings right down to the substrate.Type: ApplicationFiled: October 1, 2009Publication date: April 29, 2010Applicant: SNECMAInventors: Charly BULEON, Frederic Leman, Etienne Tulie
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Publication number: 20100104420Abstract: The method consists in depositing, by alumina spraying, an electrically insulating sublayer on the substrate, then in placing the sensor on the electrically insulating sublayer and finally in depositing, by alumina spraying, a cover layer on the sensor and the electrically insulating sublayer. It further includes, before the cover layer is deposited, a step in which an impermeable and thermally insulating cement is applied locally on wires of the sensor.Type: ApplicationFiled: October 6, 2009Publication date: April 29, 2010Applicant: SNECMAInventors: Charly BULEON, Frédéric Leman, Etienne Tulie
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Patent number: 7607213Abstract: A method of making a device for measuring deformation includes a step of depositing a silicon adhesion underlayer on a silicon carbide surface by chemical vapor spraying, and a step of depositing a coating on the silicon adhesion underlayer by atmospheric thermal spraying.Type: GrantFiled: April 24, 2008Date of Patent: October 27, 2009Assignee: SNECMAInventors: Pierre Bertrand, Christian Coddet, Sophie Costil, Frederic Leman, Sebastien Lukat
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Publication number: 20080264175Abstract: The invention relates to a method of depositing a coating on a part having its surface made of silicon carbide. The method comprises the following steps: a) applying laser treatment to the SiC surface by superposing laser impacts for the purpose of increasing the roughness of said surface; and b) depositing a coating on the SiC surface by atmospheric thermal spraying. The invention also provides a device for measuring deformation, which device comprises a first alumina coating obtained by atmospheric thermal spraying onto the silicon carbide layer covering the substrate of the part after it has been treated by superposing laser impacts, a free filament strain gauge placed on the coating, and an additional alumina coating obtained by atmospheric thermal spraying onto the strain gauge.Type: ApplicationFiled: April 24, 2008Publication date: October 30, 2008Applicant: SNECMAInventors: Frederic LEMAN, Sebastien Lukat, Sophie Costil, Christian Coddet
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Publication number: 20080264176Abstract: The invention relates to a method of depositing an alumina coating on a part having a silicon carbide surface. The method comprises the following steps: a) depositing a silicon adhesion underlayer on the SiC surface by chemical vapor spraying; and b) depositing a coating on the silicon adhesion underlayer by atmospheric thermal spraying. The invention also provides a device for measuring deformation, which device comprises a first alumina coating obtained by atmospheric thermal spraying onto the silicon adhesion underlayer deposited on the silicon carbide layer covering the substrate of the part, a free filament strain gauge placed on the coating, and an additional alumina coating obtained by atmospheric thermal spraying onto the strain gauge.Type: ApplicationFiled: April 24, 2008Publication date: October 30, 2008Applicant: SNECMAInventors: Pierre Bertrand, Christian Coddet, Sophie Costil, Frederic Leman, Sebastien Lukat
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Publication number: 20050042079Abstract: A device for guiding pivoting of variable-pitch vanes in a turbomachine, each vane having a pivot formed by a cylindrical axial shank which is guided in a cylindrical chimney of the casing and in a cylindrical orifice of a stationary element which surrounds the outside of the casing and which is centered and fixed relative thereto. The invention improves pivotal guidance of variable-pitch vanes.Type: ApplicationFiled: July 8, 2004Publication date: February 24, 2005Applicant: SNECMA MOTEURSInventors: Pierre Debeneix, Arnaud Langlois, Erick Boston, Frederic Leman, Vincent Garnier, Jacques Audet
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Patent number: 6543818Abstract: The present invention relates to an axisymmetric structural component, one of the ends of which is fitted with an inner circular flange for assembling, by bolting. The axisymmetric structural component with a second axisymmetric structural component. The flange comprises housings for receiving fixing elements such as bolts, pins or threaded rods. The housings are arranged on the circumference of the said flange at regular intervals. Each housing is, in longitudinal section (A—A) along a plane passing through the rotational axis of the component, T-shaped and consists of a first essentially cylindrical portion which is longitudinally open on the inner face (x) of the axisymmetric structural component and transversely open on the contact face (y) of the flange in the assembly. A second essentially semi-cylindrical portion is mounted on the flange which is also longitudinally open on the inner face (x) of the said structural component having an essentially D-shaped transverse section.Type: GrantFiled: May 30, 2001Date of Patent: April 8, 2003Assignees: Techspace Aero S.A., Snecma MoteursInventors: Frédéric Leman, Guy Vieillefond, Mathieu Bos, Sébastien Ryhon