Abstract: A metallic sealing assembly between a rotating shaft and a fixed frame comprises: a flexible metallic seal having two tori, inner and outer, that are concentric and of different average diameters, comprising a metal envelope which encases and holds the inner and outer tori; a shaft rotating about an axis of rotation, comprising an annular shoulder against which the seal comes to press; a counter-face, comprising a contact face against which the seal comes to press; a wedge block positioned around the rotating shaft such that the seal is held between the wedge block and the contact face, the wedge block mounted to slide on the rotating shaft; a metal part which forms a cap through which the rotating shaft passes and which is secured to the frame and/or to the counter-face, the rotating shaft being free to rotate with respect to the cap and axially secured to the cap.

Abstract: The present invention is a linear actuation system comprising a reversible screw type linear actuator, equipped with at least one reversible electrical motor system and energy storage. The energy storage is charged by linear actuation system functioning as a generator when a mobile rod of the linear actuator is moved by heave and is discharged when the mobile rod is moved by activation of an electric motor of the linear actuation system motor.

Abstract: The present invention relates to a system and to a method for storing energy in form of compressed air, having an assembly of connected tubes forming a storage volume, which are confined in a pressure-resistant thermally-insulating tank. The storage system according to the invention comprises a system for storing and releasing the heat of the compressed air to increase the storage system efficiency.

Abstract: The present invention is a linear actuation system comprising a reversible linear actuator of a screw-nut type, equipped with at least one reversible electrical motor system and energy storage means. The energy storage are charged by linear actuation system functioning as a generator which discharge whom demand by the electric motor.

Abstract: The present invention relates to a system and to a method for storing energy in form of compressed air, consisting of an assembly of connected tubes forming a storage volume, the assembly being confined in a pressure-resistant thermally-insulating tank. The storage system according to the invention comprises means for storing and releasing the heat of the compressed air so as to increase the storage system efficiency.

Abstract: A pneumatic tire with an improved balance between noise reduction and hydroplaning resistance as the tread wears. The tread of the pneumatic tire includes skewed tread blocks having walls that, as the tread wears, change the character of the lateral and circumferential channels in the tire footprint to better optimize noise reduction and hydroplaning resistance.

Abstract: Method for determining the composition of a homogeneous fluid, for example a petroleum effluent on flow, an emulsion consisting of water and oil, or a foam consisting of oil and gas. The attenuation and the phase shift of microwave beams that have traversed a fluid of unknown composition with paths of different lengths are measured (stage A). Two equations approaching the measured values are determined, the first equation giving a relation between the attenuation and the length of the path, the second equation giving a relation between the phase shift and the length of the path (stage C). Then the composition of the fluid is determined by comparing the two equations with pairs of equations stored in form of databases, each pair of equations corresponding to a fluid of known composition (stage D).

Abstract: A method of determining the composition of a multiphase fluid, such as a flowing petroleum effluent, an emulsion of water and oil, or a foam of oil and gas is disclosed. A first part comprises determining a model expressing the attenuation and the phase shift of a microwave beam as a function of the volume fractions and the permittivities of the various phases. Then, a second part comprises determining the volume fractions of the various phases that make up a multiphase fluid by minimizing the distance between the measured attenuation and phase shift pair and the attenuation and phase shift pair given by the previously determined model.

Abstract: A method of determining the composition of a multiphase fluid, such as a flowing petroleum effluent, an emulsion of water and oil, or a foam of oil and gas is disclosed. A first part comprises determining a model expressing the attenuation and the phase shift of a microwave beam as a function of the volume fractions and the permittivities of the various phases. Then, a second part comprises determining the volume fractions of the various phases that make up a multiphase fluid by minimizing the distance between the measured attenuation and phase shift pair and the attenuation and phase shift pair given by the previously determined model.

Abstract: A pneumatic tire with an improved balance between noise reduction and hydroplaning resistance as the tread wears. The tread of the pneumatic tire includes skewed tread blocks having walls that, as the tread wears, change the character of the lateral and circumferential channels in the tire footprint to better optimize noise reduction and hydroplaning resistance.

Abstract: A separating drum 1 is provided with a device for determining the position, the composition and the nature of several layers of fluid settling upstream from barrier 8. The device comprises a first rod 12 provided with microwave beam emitters 13, a second rod 14 provided with microwave beam receivers 15, a microwave source 16 that can be connected to emitters 13, and means 17 for recording and analyzing the microwave beams received by receivers 15.

Abstract: Method for determining the composition of a homogeneous fluid, for example a petroleum effluent on flow, an emulsion consisting of water and oil, or a foam consisting of oil and gas.

Abstract: Separating drum 1 is provided with a device for determining the position, the composition and the nature of several layers of fluid settling upstream from barrier 8. The device comprises a first rod 12 provided with microwave beam emitters 13, a second rod 14 provided with microwave beam receivers 15, a microwave source 16 that can be connected to emitters 13, and means 17 for recording and analysing the microwave beams received by receivers 15.

Abstract: A device and method for determining the proportion of the phases of a multiphase fluid is disclosed. The device includes microwave emission and reception devices which are suited to the composition variation of the multiphase fluid, a processor and control for determining directly, from measurements of amplitude and phase shift of a beam crossing the multiphase medium and a rate of occupation of liquid phase and/or a gas phase for a given section of the pipe. The flow rate of each of the phases is determined.

Abstract: A method for measuring the velocity of at least a liquid phase and at least a gas phase of a multiphase medium flowing in a volume is disclosed. A first wave is transmitted at a given frequency f1 selected as a function of the liquid phase through at least part of the multiphase medium. At least one parameter, characteristic of a part of the first wave which is disturbed and diffused by the flowing medium is measured. A second wave is transmitted at a given frequency f2 selected as a function of the liquid phase through at least part of the multiphase medium. At least one parameter, characteristic of a part of the second wave which is disturbed and diffused by the flowing medium is measured. At least one measured parameter is processed using the Doppler effect. A velocity field of the liquid phase and/or the gas phase is determined for a given section of the volume in response to the processed at least one parameter.