| Patent Number |
Title Of Patent |
Date Issued |
| 6585842 |
Method and machine for producing multiaxial fibrous webs |
July 1, 2003 |
| A plurality of unidirectional sheets (30a, 30b, 30c) are superposed in different directions and they are bonded together. At least one of the unidirectional sheets is made by spreading a tow so as to obtain uniform thickness, width not less than 5 cm, and a weight of no more than 300 |
| 6251317 |
Method for manufacturing a ceramic composite material |
June 26, 2001 |
| The present method of manufacturing a ceramic composite material, composed of matrix and reinforcing materials and an intermediate weak interfice material, creates a composite material particuarly intended for use at temperatures above 1400.degree. C. and in an oxidizing environment. The |
| 6228786 |
Hybrid yard for the fabrication of fiber preforms of composite parts, and method for its prepara |
May 8, 2001 |
| A yarn is formed from discontinuous parallel fibers which are not twisted and which are held together by a covering yarn of sacrificial material wound around the fibers. The fibers comprise an intimate mixture of fibers of at least two different natures selected from carbon fibers or |
| 6228444 |
Method of making tubes out of composite material having high tribological and mechanical charact |
May 8, 2001 |
| A tubular structure comprising reinforcing fibers impregnated with a thermosetting polymer and a sheet of matrix material filled with an additive suitable for improving tribological and heat conductivity characteristics of the tubular structure. The reinforcing fibers alternate with |
| 6213432 |
Method and a system for putting a space vehicle into orbit, using thrusters of high specific imp |
April 10, 2001 |
| The method serves to place a space vehicle, such as a satellite, on a target orbit such as the orbit adapted to normal operation of the space vehicle and starting from an elliptical initial orbit that is significantly different from, and in particular more eccentric than the target o |
| 6135712 |
Turbomachine with mutual braking of concentric shafts |
October 24, 2000 |
| A coating (22) with a high coefficient of friction and low thermal conductivity covers a turbomachine low pressure shaft (12) in the vicinity (17) of a concentric high pressure shaft (11), in the area at which high friction contact between the two shafts could occur if a bearing (13) on |
| 6132526 |
Titanium-based intermetallic alloys |
October 17, 2000 |
| A titanium-based intermetallic alloy having a high yield stress, a high creep resistance and sufficient ductility at ambient temperature has the following chemical composition as measured in atomic percentages:Al, from 16 to 26; Nb, from 18 to 28; Mo, from 0 to 2; Si, from 0 to 0.8; Ta, |
| 6131858 |
Compact single-propellant unitary propulsion system for a small satellite |
October 17, 2000 |
| A compact single-propellant unitary propulsion system for placing a satellite into an orbit and subsequently correcting the orbit so that the satellite is stabilized on three axes comprises a liquid propellant tank secured to a satellite platform and having a reinforced bottom wall with |
| 6129512 |
Circular stage of vanes connected at internal ends thereof by a connecting ring |
October 10, 2000 |
| A rectifier vane stage is connected to a stator that is supported at the internal end thereof by a connecting ring which includes a support ring and a stiffening ring, a retaining lip of which is inserted into the support ring and similarly into the recesses of the ends of the vanes. The |
| 6129509 |
Particle traps for turbo-prop engine |
October 10, 2000 |
| The particle trap (15) that extends behind an elbow in the air flow stream (6) in a turbo-prop engine is delimited at the back by an end plate (12) to which intake housing suspension rods (10) supporting the front of the rotating shaft (2), are fastened. It is divided by suspension arms |
| 6125826 |
Self-washing device for separating and filtering solid particles from a flow of liquid, and use |
October 3, 2000 |
| A self-washing device for separating and filtering solid particles from a ow of liquid includes a tubular casing defining an internal chamber, a tangential liquid inlet opening into the internal chamber and arranged to create a vortex in the internal chamber which acts to centrifuge out |
| 6120713 |
Method of making a casting mould having a cellular structure |
September 19, 2000 |
| A method of making a ceramic casting mould contains forming a contact layer on a disposable wax-type pattern of the article to be cast, placing the pattern in a preparation mould for defining the outer shape of the casting mould and filling the cavity formed between the pattern and the |
| 6118539 |
Optical-fiber polarimetric sensor |
September 12, 2000 |
| An optical-fiber polarimetric sensor for measuring the displacement of an object relative to a frame, the sensor comprising a measurement optical fiber secured, over a fraction of its length, both to a central point of the object and to first and second fixed points of the frame, means |
| 6116543 |
Method and a system for putting a space vehicle into orbit, using thrusters of high specific imp |
September 12, 2000 |
| The method serves to place a space vehicle, such as a satellite, on a target orbit such as the orbit adapted to normal operation of the space vehicle and starting from an elliptical initial orbit that is significantly different from, and in particular more eccentric than the target o |
| 6116203 |
Method for making an internal combustion engine piston in thermostructural composite material |
September 12, 2000 |
| A fiber structure is made by superposing plies of fiber fabric and bonding the plies together by needling, so that the fibers of the superposed plies extend essentially in a first direction (X) and in a second direction (Y) orthogonal thereto, the plies being bonded together by fibers th |
| 6105371 |
Control of cooling flows for high-temperature combustion chambers having increased permeability |
August 22, 2000 |
| The invention relates to the control of air flows for cooling the axial walls of a high-temperature combustion chamber in which the walls are provided with through holes forming multiple perforations, and involves arranging the multiple perforations so that the cooling airflow permea |
| 6098464 |
Wheatstone bridge with temperature gradient compensation |
August 8, 2000 |
| The output voltage of a Wheatstone bridge type electrical circuit compris four main resistances (J.sub.1 to J.sub.4) having substantially the same ohmic value, R, and substantially the same temperature coefficient of resistance, .alpha., is made independent of temperature difference |
| 6098401 |
Afterburner flame holder with rotationally-splitting radial arms |
August 8, 2000 |
| An afterburn device for a turbojet engine comprises a flame arrester formed by a plurality of radial arms distributed evenly around the rotational axis of the engine at the upstream end of the afterburn chamber. Each arm consists of a fixed rear part, and a front part which is separable |
| 6092934 |
Assembly of two objects articulated to each other with two degrees of freedom in rotation |
July 25, 2000 |
| Two objects are articulated together by a strong and compact joint which provides two rotational degrees of freedom about axes X and Y, and which comprises a bearing have a male inner ring swivel mounted in a female outer ring. The male inner ring is rotatably mounted on a shaft integral |
| 6086250 |
Device for optically measuring a cryogenic temperature |
July 11, 2000 |
| The present invention relates to a device for optically measuring the temperatures of cryogenic fluids or of moving surfaces in such fluids by analyzing the decay in the luminescence of a doped crystal, the device comprising a light source for exciting said crystal, an optical fiber for |
| 6085865 |
Soundproofing panel and method of producing said panel |
July 11, 2000 |
| A soundproofing panel comprises a honeycomb core sandwiched between a solid skin and a porous skin, the cells of the honeycomb being divided in the direction of its thickness into at least two resonant cavities by a least one partition which is traversed by passages interlinking the cavi |
| 6083448 |
Method of bladder moulding thin articles made of a composite material using a conforming device |
July 4, 2000 |
| The invention proposes a process for bladder moulding thin articles made of a composite material consisting of fibre and polymerised resin, the articles comprising corners having a rounded vertex and produced by a shaper. Such a process is distinguished in that the surface experiencing |
| 6082967 |
Constant-speed twin spool turboprop unit |
July 4, 2000 |
| A constant-speed twin spool turboprop unit including a twin spool gas generator having a low-pressure spool and a high-pressure spool each including a compressor and a turbine which drives the compressor, is described in which at least one propeller of the unit is driven by at least |
| 6082669 |
System for the admission of air into a working section of a gas turbine engine |
July 4, 2000 |
| The system (13) for admitting external air (12) into a working section (11) of a gas turbine engine through a jacket (10) of the working section is characterised by the combination of doors (15) sliding towards the front (ramps) and rotating doors (14). The ramps (15) are fitted with gro |
| 6068930 |
High-temperature composite materials with carbon or carbon-coated fibre reinforcements and enhan |
May 30, 2000 |
| The matrix of the composite material is made in sequenced manner by chemical vapor infiltration within fiber reinforcement. Each elementary sequence of the matrix comprises a relatively flexible layer and a relatively rigid ceramic layer, and the sequences are of thicknesses that inc |
| 6065929 |
Inducer equipment for a pump having large induction capacity |
May 23, 2000 |
| Inducer equipment adapted to a pump having large induction capacity which cludes a case surrounding an inducer rotor having a plurality of blades leaving clearance relative to the case. The clearance between the peripheral portions of the blades and the case is of an increased value |
| 6059233 |
Method and a system for launching satellites on non-coplanar orbits, making the use of gravitati |
May 9, 2000 |
| A first satellite is placed practically directly by a launcher on a first final orbit. A second satellite is placed on the same launcher is initially transferred to a highly elliptical waiting orbit whose semi-major axis points to intercept the torus formed by the sphere of influence |
| 6051313 |
Hybrid yarn for the fabrication of fibre preforms of composite parts, and method for its prepara |
April 18, 2000 |
| A yarn is formed from discontinuous parallel fibers which are not twisted d which are held together by a covering yarn of sacrificial material wound around the fibers. The fibers comprise an intimate mixture of fibers of at least two different natures selected from carbon fibers or pre-o |
| 6051071 |
Device for extracting gas from an oven for chemical vapor deposition or infiltration in an insta |
April 18, 2000 |
| A dry pump (32) has an inlet connected to the oven (10) for the purpose of establishing the desired low pressure conditions inside the oven and for extracting residual gas therefrom, a hydrolysis reactor (50) is connected to an outlet of the dry pump in order to receive residual gases co |
| 6035929 |
Apparatus for heating or cooling a circular housing |
March 14, 2000 |
| A heating or cooling apparatus for a turbo-machine housing collar that adjusts the diameter of the housing using chambers that are arcs of a circle through which gas is blown onto the ribs of the housing. The gas circulates in a counterflow direction or in alternate directions for ad |
| 6011617 |
System for inspecting internal zones of a machine by optical fibre endoscopy |
January 4, 2000 |
| A system for inspecting internal zones of a machine, such as an engine, comprises an observation device having an optical fiber endoscope, and distribution and guide means including a network of flexible guide sheaths placed in the machine to define a number of different inspection route |
| 6009605 |
Method for making fibrous preforms for producing annular parts from a composite material |
January 4, 2000 |
| Fiber preforms for use in the manufacture of composite material annular ps are made by winding superposed layers of a strip of cloth (10) of spiral or helical shape comprising substantially helical warp threads and substantially radial weft threads. The mass per unit area of the warp of |
| 6001419 |
Chemical vapor infiltration method with variable infiltration parameters |
December 14, 1999 |
| Between the start and the end of the chemical vapor infiltration process, filtration conditions are modified by causing at least one of the following infiltration parameters to vary: retention time of the gas, pressure, temperature, concentration of precursor in the gas, and concentr |
| 5996676 |
Tooling using thermostructural composite materials containing carbon for heat treatment and/or t |
December 7, 1999 |
| An interposition layer (12) is formed on the outside surface of a part (10) made of thermostructural composite material containing carbon, and a metal case is formed by casting molten metal (22) around the part provided with its interposition layer. The interposition layer has closed por |
| 5991987 |
Methods and apparatus for making ring-shaped parts out of a composite material, as well as prefo |
November 30, 1999 |
| Preforms for producing annular parts of composite material are produced by inding a strip (1) of fibrous material around an elliptical mandrel (10) to produce an elliptical sleeve which can be cut obliquely, cutting taking place either before or after one or more densification steps. The |
| 5989735 |
Protective coating for metal components providing good corrosion resistance in a saline atmosphe |
November 23, 1999 |
| A coating for protecting metal components against corrosion in a saline atmosphere comprises at least one layer of a tin/zinc alloy containing between 8% and 35% by weight of zinc deposited on a sublayer of an alloy of zinc/nickel containing between 10% and 16% by weight of nickel, the |
| 5980669 |
Method of manufacturing complex one-piece structural parts of composite material |
November 9, 1999 |
| A fiber preform is made solely from a deformable base fiber structure that s initially in the form of a plane plate constituted by superposed two-dimensional fiber plies bonded together by needling. Cuts and/or splits are formed in the base fiber structure, and the preform is made fro |
| 5980201 |
Device for blowing gases for regulating clearances in a gas turbine engine |
November 9, 1999 |
| A gas mixer (8) which placed in a flow of gases upstream of a ring (3) that is to be heated or cooled, the gas mixer (8) including a succession of mbers (12, 14, 15) having communication or outlet orifices (16, 17, 18) in large numbers in order to render uniform a rate and temperature |
| 5965266 |
Composite material protected against oxidation by a self-healing matrix, and a method of manufac |
October 12, 1999 |
| A composite material protected by oxidation at intermediate temperatures exceeding 850.degree. C. comprises fiber reinforcement densified by a matrix which includes at least one self-healing phase including a glass-precursor component such as B.sub.4 C or an Si--B--C system, togeth |
| 5965037 |
Inert gas electric arc welding process and torch for use therein |
October 12, 1999 |
| An inert gas electric arc welding process is described in which the refractory electrode of the welding torch is rotated about its own axis throughout the welding operation so that the electric arc produced at the end of the electrode rotates and agitates the surface of the melt pool |
| 5964575 |
Apparatus for ventilating a turbine stator ring |
October 12, 1999 |
| This ventilation apparatus uses gas under pressure diverted from a cooler area of the turbine that reaches a chamber and (8) successively passes through a cover (6) perforated with flow-restricting apertures (13), and then a wall (7) perforated with distribution apertures (12) before |
| 5961077 |
Method and a system for launching satellites simultaneously on non-coplanar orbits by using high |
October 5, 1999 |
| A launcher places a first satellite practically directly on a final orbit. A second satellite carried by the same launcher is initially transferred onto a waiting orbit that is highly elliptical, having a semi-major axis situated in the initial orbital plane. The inclination and the peri |
| 5950904 |
Gas containment box used with a welding head |
September 14, 1999 |
| This invention concerns a containment box disposed around a welding head (1) and including a fixed frame carrying a fairing (16) modeled to the shape of the element (3) to be welded, a cover (9) sliding on the frame (10), and a bell with spherical boss (7) integral with the welding head |
| 5946802 |
Process for the manufacture of a hollow turbomachine blade and apparatus for use in said process |
September 7, 1999 |
| In a process for the manufacture of a hollow turbomachine blade in which die-forged and machined sheets are assembled and diffusion welded face to face after applying an antidiffusion coating to areas of the sheets where the assembly is to be expanded in forming the hollow blade, the wel |
| 5945781 |
Ion source with closed electron drift |
August 31, 1999 |
| A closed electron drift ion source comprising a main annular channel for ionization and acceleration that is open at its downstream end, and that has at least an inside wall constituted by a material that is electrically conductive. Terminal parts taken to a potential that is lower than |
| 5944485 |
Turbine of thermostructural composite material, in particular a turbine of large diameter, and a |
August 31, 1999 |
| The turbine comprises a plurality of blades disposed around a hub between two end plates, with the blades, the hub, and the end plates being made of thermostructural composite material. The hub is made by stacking plane annular plates of thermostructural composite material along a common |
| 5941688 |
Fibre-reinforced rotor stage for a turbomachine |
August 24, 1999 |
| A turbomachine rotor stage having a thin annular body comprising a metal alloy part reinforced by at least one fibrous ring which has a radial height h of at least 1.5 times its axial width l and which is embedded in the metal alloy part so that it projects radially outwardly from the in |
| 5941075 |
Fuel injection system with improved air/fuel homogenization |
August 24, 1999 |
| A system is disclosed for injecting air and fuel into a combustion chamber of a turbojet engine in which the system includes a fuel injector having an axis A, a first radial swirler located rearwardly of the fuel injector having a plurality of first air passages to direct air into the fu |
| 5937653 |
Reduced pollution combustion chamber having an annular fuel injector |
August 17, 1999 |
| An annular combustion chamber is disclosed for use in a gas turbine engine, the combustion chamber having an axis of symmetry, an inner annular wall, an outer annular wall, and a forward end extending between the inner and outer wall to form boundaries for the combustion chamber. The for |
| 5934564 |
Variable geometry turbojet engine exhaust nozzle |
August 10, 1999 |
| A variable geometry exhaust nozzle is disclosed for a turbojet engine having a rear portion, the nozzle having an outer flap ring with a plurality of driven outer flaps and a plurality of outer interlock flaps, each outer flap being pivotally connected to the rear portion of the turb |
