Abstract: A method for manufacturing a membrane-electrode assembly for a fuel cell comprises the following steps: a first step during which a reinforcement (2) is deposited on a first face of an ion-exchanging membrane (1), the membrane being held on a support film; a second step during which the membrane is unglued from the support film; a third step during which the reinforcement (2?) is deposited on the second face of the ion-exchanging membrane; and a fourth step during which a chemical catalyst element is deposited on the parts left free of the first and second faces of the membrane.

Abstract: A method for manufacturing a membrane-electrode assembly for a fuel cell comprises the following steps: a first step during which a chemical catalyst element is deposited on a first face of an ion-exchanging membrane, the membrane being held on a support film; a second step during which the membrane is unglued from the support film; a third step during which the membrane is inserted between two reinforcing elements; and a fourth step during which a chemical catalyst element is deposited on the part left free of the second face of the membrane.

Abstract: A stack is provided for manufacturing bipolar plates for fuel cells. Each bipolar plate includes two sheets that are in a superimposed position relative to each and separated by a layer of filler material between the two sheets. The stack includes, in an alternately arranged manner, bipolar plates and intermediate plates. At least one of the intermediate plates has a plurality of slots passing through the intermediate plate in a direction of a thickness of the intermediate plate.

Abstract: A method for treating a bipolar plate for a fuel cell includes passing the bipolar plate between two rows of parallel straightening rollers. Action of the parallel straightening rollers on the bipolar plate result in opposite faces of the bipolar plate being on parallel planes.

Abstract: The invention relates to a method for manufacturing a membrane-electrode assembly for a fuel cell, the method comprising the following steps: A first step during which a chemical catalyst element is deposited on a first face of an ion-exchanging membrane, the membrane being held on a support film, A second step during which the membrane is unglued from the support film, A third step during which the membrane is inserted between two reinforcing elements, and A fourth step during which a chemical catalyst element is deposited on the part left free of the second face of the membrane.

Abstract: A method for manufacturing a membrane-electrode assembly for a fuel cell comprises the following steps: a first step during which a reinforcement (2) is deposited on a first face of an ion-exchanging membrane (1), the membrane being held on a support film; a second step during which the membrane is unglued from the support film; a third step during which the reinforcement (2?) is deposited on the second face of the ion-exchanging membrane; and a fourth step during which a chemical catalyst element is deposited on the parts left free of the first and second faces of the membrane.

Abstract: A wheel drive system for ground movement of an aircraft includes a motor system and a clutch system. The motor system, which is borne by an unsuspended part of a landing gear strut of the aircraft, includes an electric motor and a reduction gearing system. The clutch system, which connects an output shaft of the electric motor to a wheel of the aircraft via the reduction gearing system, includes a dog-clutch and a translational movement system. The dog-clutch includes a drive part, which is secured to the motor system, and a receiving part, which secures to a rim of the wheel. The translational movement system moves the drive part along an axis of an axle crossbeam of the landing gear strut into an engaged position, in which the drive part collaborates with the receiving part, and a disengaged position, in which the drive part is separated from the receiving part.

Abstract: A wheel drive system for ground movement of an aircraft includes a motor system and a clutch system. The motor system, which is borne by an unsuspended part of a landing gear strut of the aircraft, includes an electric motor and a reduction gearing system. The clutch system, which connects an output shaft of the electric motor to a wheel of the aircraft via the reduction gearing system, includes a dog-clutch and a translational movement system. The dog-clutch includes a drive part, which is secured to the motor system, and a receiving part, which secures to a tire of the wheel. The translational movement system moves the drive part along an axis of an axle crossbeam of the landing gear strut into an engaged position, in which the drive part collaborates with the receiving part, and a disengaged position, in which the drive part is separated from the receiving part.

Abstract: A stack is provided for manufacturing bipolar plates for fuel cells. Each bipolar plate includes two sheets that are in a superimposed position relative to each and separated by a layer of filler material between the two sheets. The stack includes, in an alternately arranged manner, bipolar plates and intermediate plates. At least one of the intermediate plates has a plurality of slots passing through the intermediate plate in a direction of a thickness of the intermediate plate.

Abstract: Method for treating a bipolar plate for a fuel cell, this plate having opposite faces (15, 16), comprising: passing the bipolar plate (5) between two rows (25, 26) of straightening parallel rollers (27, 28) such that the opposite faces (15, 16) of the bipolar plate (5) tend to parallel planes.

Abstract: A wheel motorization system, useable for an aircraft to run along a ground surface, includes an electric motor, a driving member securable with a hub of a wheel of the aircraft, and a clutch device connecting an output shaft of the motor to the driving member via a reduction device. The clutch device includes a freewheel device, which allows transmission of a rotational torque only in a first torque transmission direction when the aircraft is travelling forwards.

Abstract: Wheel drive system, particularly for the ground circulation of an aircraft comprising a motor unit (22) borne by an unsuspended part (14b) of a landing gear strut (14) of the aircraft and comprising an electric motor (26) and reduction means, and a clutch device (24) connecting the output shaft (26a) of the electric motor (26) to the wheel (12) via the reduction means. The clutch device (24) comprises a dog-clutch mechanism (32, 34) comprising a drive part (32) secured to the motor unit (22) and a receiving part (34) secured to the tire (12a) of the wheel (12), and a system for the translational movement, along the axis of the axle crossbeam (20) of the landing gear strut (14), of the drive part (32) into an engaged position in which the drive part (32) collaborates with the receiving part (34) and a disengaged position in which the drive part (32) is separated from the receiving part (34).

Abstract: Wheel drive system, particularly for the ground circulation of an aircraft comprising a motor unit (22) borne by an unsuspended part (14b) of a landing gear strut (14) of the aircraft and comprising an electric motor (26) and reduction means, and a clutch device (24) connecting the output shaft (26a) of the electric motor (26) to the wheel (12) via the reduction means. The clutch device (24) comprises a dog-clutch mechanism (32, 34) comprising a drive part (32) secured to the motor unit (22) and a receiving part (34) secured to the rim (12b) of the wheel (12), and a system for the translational movement, along the axis of the axle crossbeam (20) of the landing gear strut (14), of the drive part (32) into an engaged position in which the drive part (32) collaborates with the receiving part (34) and a disengaged position in which the drive part (32) is separated from the receiving part (34).

Abstract: Wheel motorization system, notably for an aircraft running along the ground, comprising an electric motor (5), a driving member (6) integral with the hub (7) of the wheel (2), a clutch device (10) connecting the output shaft (5a) of the motor (5) to the driving member (6) via reduction means (20). The clutch device (10) comprises a freewheel device (12) allowing transmission of the rotational torque only in a first torque transmission direction when the aircraft is travelling forwards.

Abstract: A tank (1) for storing fluid under high pressure, of cylindrical overall shape and round cross section comprising at each of its ends along its axis (2), a metal end piece (3, 4), a liner (6) enveloping the said end pieces, and a structural layer (7) of fiber impregnated with thermosetting resin enveloping the said liner.

Abstract: A buried-magnet internal rotor (1) for an electric rotating machine, the rotor comprising: a shaft (2), a plurality of polar parts (30) made of a magnetic material and surrounding the shaft, the polar parts delimiting magnet housings (40) between them, a plurality of permanent magnets (4) placed in the magnet housings (40), a lateral shroud (5, 5?) axially on each side of the polar parts along the shaft (2), the shaft passing through each lateral shroud, in which the housings are closed radially by wedges (51) interacting with longitudinal splines (31) of the polar parts, the said rotor being characterized in that the wedges have a T-shaped profile, the radial bearing faces (54) of the wedges in the polar parts being perpendicular to the central radius (41) of the housings (40), and in that, since the wedges (51) extend axially beyond the polar parts, their ends (511) are thinned and folded into a peripheral groove (52) of each lateral shroud (5, 5?).

Abstract: A tank (1) for storing fluid under high pressure, of cylindrical overall shape and round cross section comprising at each of its ends along its axis (2), a metal end piece (3, 4), a liner (6) enveloping the said end pieces, and a structural layer (7) of fibre impregnated with thermosetting resin enveloping the said liner.

Abstract: An amount of water is added to a glycol solution to be purified to enable segregation of the resulting mixture into a hydrocarbon phase and a glycol phase. The hydrocarbon phase is separated from the glycol phase and said glycol phase is desalted, e.g. by electrodialysis, to give a desalted and substantially hydrocarbon-free glycol solution which is then concentrated by steam stripping. The method is useful for purifying waste glycol solutions resulting from oil or gas production effluent processing using glycols, and in particular from a gas hydrate inhibition treatment or natural gas dehydration.

Abstract: The invention is a process for the denitrogization of a liquefied natural gas (LNG) comprising methane and at least 2 Mols. of nitrogen. The process is distinguished in that the LNG is introduced into the process as a liquid and is subject to an indirect heat exchange to cool the liquid and a further decompression before introduction into fractionation of column. A portion of the liquid flowing in the fractionation column is withdrawn and utilized to cool the LNG feedstock and is returned to the fractionation column at a level lower than the level from which it was withdrawn. The decompression of LNG feedstock comprises at least one dynamic decompression and at least one static decompression.

Abstract: Process for the simultaneous decarbonation and gasoline stripping of a gaseous mixture at an absolute pressure higher than 0.5 MPa containing methane, C.sub.2 and higher hydrocarbons and CO.sub.2 in which a demethanized rich solvent is regenerated so the process can be carried out more easily and at lower costs than previously known systems.