Abstract: A controlled valve with the possibility of autonomous opening and an aircraft having a valve of this type are disclosed. The controlled valve enables the regulation of presures or flow rates. Furthermore, the disclosed control valve can open autonomously under the effect of a pressure difference exceeding a pre-determined threshold. Thus, it enables fast balancing of pressures if the pressure difference should exceed a threshold beyond which, for example, an installation could be in danger. The disclosed device can be applied to any device for the regulation of pressure and/or flow rate between a chamber and the exterior or between two chambers having a safety balancing device. The disclosure can be applied notably in aeronautical construction, the construction of petroleum refineries, fluid distribution devices and chemical reactors.

Abstract: Disclosed is an obturator ring for valves of the butterfly valve type which has, mounted in a groove made on the periphery of the flap, a split ring-shaped seal working with a first elastic member applying the seal against the valve body and a second elastic member applying the seal against the groove, the elastic members being made of a refractory material.

Abstract: A heating method and device for vehicles with limited power requirement, more particularly for light vehicles such as helicopters and light aircraft. For limiting the weight of the auxiliary airborne equipment, the invention provides at least partially heating of the cabin by reversal of the cooling cycle. For that a valve diverts coolant fluid to the evaporator for reheating the recirculation air of the cabin.

Abstract: An air-conditioning installation for aircraft, especially for passenger aircraft is disclosed. The energy resulting from the expansion of the air that leaves the cabin is used to actuate at least one element of the installation such as an expansion turbine or a compressor. The temperature of the air leaving the expansion turbine is lower than the temperature of the external air.

Abstract: A hydrodynamic bearing to support and guide a rotating machine shaft is disclosed. This bearing comprises, in the bore of a bearing body, an independent cartridge, designed to form the internal functional set of the bearing, said cartridge consisting of thin, curved foils fixed with respect to one another with overlapping parts, so as to make an independent unit having, firstly, an internal floating surface adapted to being placed around the shaft and to conditioning, during the rotation of the shaft, the formation of a fluid film between the shaft and the internal surface and, secondly, a peripheral external surface with a diameter corresponding to that of the bore of the bearing body. It further has means to immobilize the cartridge inside the bore in rotation and in internal translation. Furthermore, the external surface of the cartridge is surrounded with a flexible foil, fixed by one of its ends on an external generatrix of the cartridge, the other end being free.

Abstract: The invention provides a process for producing hydrodynamic bearings for supporting and guiding rotary machine shafts. The process consists in previously manufacturing a self-contained cartridge formed of thin foils fixed with respect to each other and partially overlapping so as to form an internal floating surface adapted to generate the formation of a fluid film between said surface and the shaft mounted therein; the cartridge comprises an external peripheral surface of a diameter corresponding to that of the bore of the bearing shell and is inserted in this bore then secured against rotation and axial translation with respect thereto, more especially by abutment means situated in the edge region.

Abstract: A conditioning method and an air-conditioner for carrying out such method which comprises, in a compression, cooling and expansion cycle, a drying operation performed prior to the expansion. According to the invention, a dryer is alternately operated in an adsorption phase and a regeneration phase, depending on whether it communicates with the outlet or the inlet of a heat exchanger. The present method and device can be advantageously applied to environment control in the field of aircraft and automotive vehicle air conditioning.

Abstract: Rapid discharge extinguisher comprising a container containing an inhibition agent, especially a liquid that is vaporized when it is expanded and a pressurized gas such as nitrogen, a through cover sealing the container, and an explosive charge in order to shear the through cover, the explosive charge acting by shock wave and being disposed inside the container, adjacent to the through cover and the discharge time being about 35 milliseconds.

Abstract: The invention provides a process for producing hydrodynamic bearings for supporting and guiding rotary machine shafts. The process consists of pre-manufacturing a self-contained cartridge formed of thin foils, each fixed to its two next adjacent foils at locations staggered along said foils at overlapping parts thereof, so as to form an internal floating surface adapted to generate the formation of a fluid film between this surface and a shaft mounted therein. The cartridge has an external peripheral surface with a diameter corresponding to that of the bore of the bearing shell, and is inserted in this bore and then secured against rotation and axial translation with respect thereto by an abutment situated in the end region.