Servant, FR
Dorine Servant, Castelmaurou FR
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20130265797 | Textile covering incorporating an optical fibre and associated installation method - A textile covering, comprising an under-layer in contact with a rear face of a layer of textile fibres, and comprising an optical fibre housed inside a routing groove in the under-layer, an end portion of the optical fibre extending through the layer of textile fibres via a support device of the optical fibre. The support device comprises a fixing ring and a heat-shrink tubing covering part of the fixing ring and of the end portion. The fixing ring comprises a base in contact with the rear face and a cylindrical portion into which the end portion of the optical fibre is inserted. The textile covering may be used as carpet equipping the floor of an aircraft cabin. | 10-10-2013 |
Florence Servant, Grenoble FR
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20090013925 | Device for producing a block of crystalline material with modulation of the thermal conductivity - The device for producing a block of crystalline material from a bath of molten material comprises a crucible having a bottom and heat extraction means arranged under the crucible. It also comprises means for modulating the thermal conductivity fitted between the bottom of the crucible and the heat extraction means. The means for modulating the thermal conductivity comprise a plurality of plates made from thermally conducting material of low emissivity, parallel to the bottom of the crucible, and means for moving said plates closer to and away from one another. | 01-15-2009 |
20100003183 | Method of purifying metallurgical silicon by directional solidification - The method enables metallurgical silicon to be purified by directional solidification to obtain solar or photovoltaic grade silicone. A crystallization step uses at least one silicon seed, preference of solar grade or even microelectronic grade, having for example a purity substantially equal to or greater than a predetermined purity of the solar-grade silicon. The silicon seed which covers the bottom of the crucible can come from a previous crystallization or be formed by a silicon wafer. The use of a single-crystal or textured multi-crystal seed enables crystallographic orientation of the solar-grade silicon. An intermediate layer of solid metallurgical silicon can be arranged on the silicon seed and a metallurgical silicon feedstock is arranged on the intermediate layer. | 01-07-2010 |
20100171232 | METHOD FOR SEMICONDUCTOR SOLIDIFICATION WITH THE ADDITION OF DOPED SEMICONDUCTOR CHARGES DURING CRYSTALLISATION - A method for semiconductor solidification which includes steps for: | 07-08-2010 |
Florence Servant, Vaulnaveys Le Haut FR
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20130289184 | MASTER BATCH FOR CERAMIC- OR METAL-POWDER INJECTION-MOLDING, AND METHOD FOR PREPARING SAID MASTER BATCH - The master batch for molding includes at least one inorganic powder, advantageously ceramic or metallic; an organic mixture, advantageously polymer, comprising: a stable polymer having good ductility features, from 30 to 90% by mass of the mixture; a lubricant, from 5 to 50% by mass of the mixture; a plasticizing polymer, from 5 to 30% by mass of the mixture; with a [% by mass of the lubricant]/[% by mass of the stable polymer] ratio smaller than or equal to 1, advantageously strictly smaller than 1. | 10-31-2013 |
20140077403 | PROCESS FOR MANUFACTURING COLOURED CERAMIC PARTS BY PIM - A method of manufacturing a master batch for the molding of colored parts, including the steps of: preparing a mixture comprising an inorganic powder, advantageously ceramic, and a dye; submitting the mixture to a spray-drying step to obtain an atomized powder; submitting said atomized powder to a presintering step; mixing the presintered powder with an organic binder, advantageously polymeric, to obtain the master batch. | 03-20-2014 |
Florence Servant, Vaulvaneys Le Haut FR
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20140154402 | PRODUCTION OF POLYCRYSTALLINE SILICON BY NATURAL SINTERING FOR PHOTOVOLTAIC APPLICATIONS - Silicon sintering method, without applying an external force, comprising placement of a silicon sample in a furnace, then heat treatment of this sample at, at least one temperature and at least one partial pressure of oxidising species to control the thickness of a silicon oxide layer on its surface. | 06-05-2014 |
Regis Eugene Henri Servant, Moissy Cramayel Cedex FR
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20150330308 | TURBOJET WITH A DISCHARGE DUCT - The invention relates to a unit comprising an intermediate turbojet casing formed by a hub including a downstream transverse endplate having formed therein at least one first opening putting the inside of the hub into communication with a duct extending downstream from the endplate and opening out at its downstream end via a second opening formed in an outer annular shroud extending downstream from the hub for defining the inside of an annular flow space for a secondary stream. More particularly, the upstream end of said duct is fastened to the downstream endplate of the hub by releasable elastic engagement. | 11-19-2015 |
Regis Eugene, Henri Servant, Vigneux Sur Seine FR
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20080317594 | INSTALLING A SHAFT IN A BEARING COMPRISING A SELF-RELEASING NUT - The present invention relates to a gas turbine engine comprising a shaft, a bearing, a coupling supported by the bearing, the shaft being engaged by an end trunnion inside the coupling and fixed to the coupling by means of a cylindrical nut. The engine is characterized in that the nut is in axial abutment in a first direction against the coupling and the trunnion is screwed onto the nut, a slotted stop ring housed in an annular groove of the nut forms an axial abutment in the direction opposing the first direction, so as to allow the removal of the trunnion from the coupling by unscrewing the nut. | 12-25-2008 |
20090000273 | TWIN FAN TURBOMACHINE - A twin fan turbomachine with two contrarotating fans, one upstream and one downstream, driven by two contrarotating coaxial shafts each of which connects one fan impeller to at least one low-pressure turbine impeller located downstream, the downstream fan impeller being connected by its downstream part to its drive shaft. | 01-01-2009 |
20090155052 | MOUNTING TUBES FOR PRESSURIZING AN INTERNAL ENCLOSURE IN A TURBOMACHINE - A turbomachine comprising high- and low-pressure compressor shafts guided in bearings isolated from an internal enclosure by a sealing end plate, and radial pressurization tubes connecting the enclosure to an air passage passing through the intermediate casing, the ends of these tubes being engaged in sealed manner in radial ducts of the intermediate casing and in radial chimneys of the sealing end plate, the chimneys being of a length is sufficient to enable the ends of the tubes to be moved in translation therein between a service position and a mounting position for the tubes. | 06-18-2009 |
20090155073 | SEALING THE FASTENING OF A BEARING SUPPORT IN A TURBOMACHINE - A turbomachine including a shaft guided in an upstream bearing and a downstream bearing, the upstream bearing being carried by a first annular support that is fastened by bolts to a casing via a second annular support that carries the downstream bearing, wherein the ends of the fastener bolts are covered by an annular cover sealingly fastened to the second support or to the casing. | 06-18-2009 |
20090297083 | DEVICE FOR THE AXIAL LOCKING OF A GUIDE SHAFT BEARING IN A TURBOMACHINE - Guide shaft bearing comprising an internal ring mounted on a cylindrical contact surface of a shaft and means for the axial locking of the ring comprising a ring mounted sliding on the cylindrical contact surface and an annular rib made of shape memory material mounted in two annular grooves of the cylindrical contact surface and of the ring, the annular rib being able to expand radially by shape memory effect when it is subjected to a temperature greater than a transition temperature of its material to pass to a locking position of the ring on the cylindrical contact surface. | 12-03-2009 |
20110150657 | TURBOMACHINE FAN ROTOR - A turbomachine fan rotor including a disk carrying blades with roots that are engaged in axial grooves of the disk, a spacer being interposed between the bottom of each groove and the corresponding blade root, the spacer including at its upstream end a nib for retaining the blade root, the nib including a downstream abutment face against which the upstream end of the blade root bears in event of a violent force being applied thereto, the abutment face being oblique relative to the axis of rotation of the rotor. | 06-23-2011 |
20130236291 | DEVICE FOR UNCOUPLING A BEARING CARRIER - A device for uncoupling a bearing carrier in a turbomachine, the bearing carrier including an upstream part and a downstream part including a plurality of upstream orifices respectively facing a plurality of downstream orifices. The uncoupling device includes rupture screws each passing through an upstream orifice and a downstream orifice, and at least a mechanism for double centering of a rupture screw with respect to the upstream orifice and to the downstream orifice respectively. The mechanism for double centering is independent of the upstream and downstream parts of the bearing carrier and of the rupture screw, and is configured to collaborate with the upstream part of the rupture screw such that when the rupture screw breaks, the upstream part carries with it the mechanism for double centering. A turbomachine can include such an uncoupling device. | 09-12-2013 |
20130319140 | DRIVESHAFT FOR THE GEARBOX OF AUXILIARY MACHINES OF A TURBOJET ENGINE - A turbojet engine including an intermediate casing including radial arms and a driveshaft for a gearbox for auxiliary machines of the turbojet engine, the driveshaft mounted in a radial arm, the radial arm including an intermediate bearing supporting the driveshaft, the intermediate bearing including plural rolling bearings supporting the driveshaft, the driveshaft including a first shaft element connected at one end to a mechanism providing mechanical transmission to an engine shaft of the turbojet engine, and a second shaft element connected at one end to a mechanism providing mechanical transmission to the box. The first shaft element and the second shaft element are linked by a connection including plural splines. A single plane transversely passes through the plural splines and the plural rolling bearings. | 12-05-2013 |
20140119893 | DUAL-FLOW TURBINE ENGINE HAVING A DECOUPLING DEVICE - A dual-flow turbine engine including: a fan rotatably mounted on a fan shaft and a stationary structural element, the fan shaft and the structural element being connected to one another at an upstream bearing and at a downstream bearing via an upstream bearing bracket and a downstream bearing bracket, respectively; and a decoupling device surrounding the fan shaft, and including a set of attachment screws joining the downstream bearing bracket to the structural element and a set of fusible screws joining the upstream bearing bracket to the downstream bearing bracket. At least some of the fusible screws are arranged between at least some of the attachment screws over a single circumference surrounding the fan shaft. | 05-01-2014 |
Régis Eugène Henri Servant, Vigneux Sur Seine FR
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20110189012 | TURBOMACHINE OPTIMIZED FOR FASTENING A ROTARY SHAFT BEARING. A METHOD OF MOUNTING SAID BEARING ON SAID TURBOMACHINE - A turbomachine including a shaft, a bearing for supporting the shaft and including an outer ring, and a support for said bearing, the support having a flange to which the outer ring is fastened by fasteners; each fastener comprising a fastener bolt and a nut screwed together; the turbomachine also including for each fastener, position-retention means for retaining the bolt, and suitable for retaining the bolt in a position that is stationary relative to the bearing support or the outer ring, even in the absence of the nut. The head of the fastener bolt and the position-retention means may be of small dimensions, thereby enabling the fastening of the flange to the bearing support to be optimized, and in particular enabling the weight of said fastening to be optimized. The invention also provides a method of mounting said bearing of the turbomachine. | 08-04-2011 |
20120099981 | AEROENGINE FAN CASING MADE OF COMPOSITE MATERIAL, AND A METHOD OF FABRICATING IT - An aeroengine fan casing is made of composite material comprising fiber reinforcement densified by a matrix. The casing ( | 04-26-2012 |
RÉgis EugÈne Henri Servant, Moissy-Cramayel Cedex FR
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20120288369 | SYSTEM FOR SECURING TWO TUBULAR COMPONENTS ONE IN THE OTHER, CARRYING A ROLLER BEARING - System for securing two tubular components ( | 11-15-2012 |
Victor Servant, Issy Les Moulineaux FR
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20150222423 | PROTECTION AGAINST SIDE CHANNELS - The description pertains in particular to a method of protecting an electronic device (SCARD), when the electronic device implements a cryptographic algorithm (AES), against side channel attacks. The cryptographic algorithm (AES) operating on an array of states which forms the subject of a secure processing. The description relates also to an electronic device (SCARD), a computer program and a storage medium for the implementation of such a method. | 08-06-2015 |