Abstract: The present invention relates to a process for the self-regulated production as a function of the demand, under submerged conditions, of a gas (G), said gas (G) being generated by a chemical reaction between a liquid (L) and a solid (S) (hydrogen generated by hydrolysis of a metal hydride, for example) and not being polluted between the generation thereof and the delivery thereof. The present invention also relates to a device suitable for the implementation of said process.

Abstract: The present invention relates to a process for the self-regulated production as a function of the demand, under submerged conditions, of a gas (G), said gas (G) being generated by a chemical reaction between a liquid (L) and a solid (S) (hydrogen generated by hydrolysis of a metal hydride, for example) and not being polluted between the generation thereof and the delivery thereof. The present invention also relates to a device suitable for the implementation of said process.

Abstract: The present invention relates to solid compounds which generate hydrogen by combustion, and to a method for generating hydrogen based on the combustion of said compounds. Said compounds have a composition which includes at least one inorganic borohydride, selected from alkali borohydrides, alkaline-earth borohydrides and mixtures thereof, and at least one inorganic oxidant. Characteristically, said composition comprises sulfur. Said method is advantageously implemented for supplying hydrogen to a fuel cell.

Abstract: The present invention relates to solid compounds which generate hydrogen by combustion, and to a method for generating hydrogen based on the combustion of said compounds. Said compounds have a composition which includes at least one inorganic borohydride, selected from alkali borohydrides, alkaline-earth borohydrides and mixtures thereof, and at least one inorganic oxidant. Characteristically, said composition comprises sulfur. Said method is advantageously implemented for supplying hydrogen to a fuel cell.

Abstract: The fuel cell (2) is of the kind comprising an anode (12) and a cathode (10) between which an electrolyte (18) is interposed. Solid bodies (20) storing a hydrogen mass, able to be decomposed by combustion, are associated to pyrotechnic means (24,26) to release the hydrogen and bring it into contact with the anode (12). Means (38) tap the ambient air to bring it into contact with the cathode (10). Firing of the pyrotechnic means (24,26) is placed under the control of addressing means (28) embedded in the appliance (2). The surplus water produced by the exchange between the hydrogen and the oxygen is resorbed by the temperature increase induced by combustion of the bodies (20). The solid bodies (20) are supported by an interchangeable card (22).

Abstract: The invention relates to a solid composition which can decompose with the generation of hydrogen according to a self-sustaining combustion reaction after initiation of this reaction by an appropriate heat source, this composition being characterized in that it comprises an alkali metal borohydride or alkaline earth metal borohydride and a perchlorate-based oxidizing salt corresponding to the general formula SClO4 in which X represents the NH4 group, an alkali metal or an alkaline earth metal.

Abstract: The technical field of the invention is that of pyrotechnic actuators having the essential function either of inflating a structure or of displacing a component by way of a ram. The subject of the invention relates more specifically to a gas-generating actuator (1, 100) comprising an ignition system (3, 103) and an energetic charge. The main characteristic of the actuator (1, 100) is that the charge is made up of a reducing material (4, 104) and of an oxidizing fluid (2, 102) which are separate.

Abstract: The technical field of the invention is that of microactuators designed for mechanical, chemical, electrical or thermal functions in microsystems, for microelectronic applications such as chips, or biomedical applications such as cards incorporating microfluidics. The invention concerns a microactuator comprising a chamber machined in a solid support and containing a pyrotechnic charge. Said microactuator is essentially characterised in that the chamber is partly delimited by a deformable membrane, such that the gases emitted by combustion of the pyrotechnic charge enable to increase the volume of said chamber by deforming said membrane while maintaining intact the solid walls of the chamber.

Abstract: The technical field of the invention is that of microactuators designed for mechanical, chemical, electrical or thermal functions in microsystems, for microelectronic applications such as chips, or biomedical applications such as cards incorporating microfluidics. The invention concerns a microactuator (1, 60) comprising a chamber (2, 63) machined in a solid support (3) and containing a pyrotechnic charge (6). Said microactuator (1, 60) is essentially characterised in that the chamber (2, 63) is partly delimited by a deformable membrane (4, 62), such that the gases emitted by combustion of the pyrotechnic charge (6) enable to increase the volume of said chamber (2, 63) by deforming said membrane (4, 62) while maintaining intact the solid walls of the chamber (2, 63).

Abstract: The fuel cell (2) is of the kind comprising an anode (12) and a cathode (10) between which an electrolyte (18) is interposed. Solid bodies (20) storing a hydrogen mass, able to be decomposed by combustion, are associated to pyrotechnic means (24,26) to release the hydrogen and bring it into contact with the anode (12). Means (38) tap the ambient air to bring it into contact with the cathode (10). Firing of the pyrotechnic means (24,26) is placed under the control of addressing means (28) embedded in the appliance (2). The surplus water produced by the exchange between the hydrogen and the oxygen is resorbed by the temperature increase induced by combustion of the bodies (20). The solid bodies (20) are supported by an interchangeable card (22).

Abstract: The invention relates to a solid composition which can decompose with the generation of hydrogen according to a self-sustaining combustion reaction after initiation of this reaction by an appropriate heat source, this composition being characterized in that it comprises an alkali metal borohydride or alkaline earth metal borohydride and strontium nitrate Sr(NO3)2.

Abstract: The invention relates to a solid composition which can decompose with the generation of hydrogen according to a self-sustaining combustion reaction after initiation of this reaction by an appropriate heat source, this composition being characterized in that it comprises an alkali metal borohydride or alkaline earth metal borohydride and a perchlorate-based oxidizing salt corresponding to the general formula XClO4 in which X represents the NH4 group, an alkali metal or an alkaline earth metal.

Abstract: The invention relates to solid compositions that can decompose generating hydrogen in a self-sustaining combustion reaction after this reaction has been initiated by an appropriate heat source. These compositions comprise an alkali metal borohydride and an oxidizing mineral ammonium salt of formula NH4Y, in which Y represents a group consisting only of nitrogen and oxygen. The ratio of the weight content of alkali metal borohydride to the weight content of the salt of general formula NH4Y is between 1 and 4. Thus, high hydrogen mass yields are obtained, of around 8 to 14%, thereby making it possible to reduce the size and the weight of the hydrogen generators used in certain systems, especially in proton exchange membrane fuel cells.

Abstract: The invention relates to the field of hybrid generators for motor vehicle safety. The generator (101) comprises a cylindrical housing (2) closed by a closure ring (5) bearing an ignition device (8). An internal wall (12) bearing a central opening (14) and a hollow neck (16) in which is inserted a ring-shaped block (19) of solid ablatable fuel separates a reservoir chamber (17) containing pressurized air from a combustion and mixing chamber (18). Discharge holes (21) closed by breakable diaphragms (22) are arranged on the circumference of the combustion chamber (18). This generator has a very simple design and enables the inflating of cushions for protecting the occupants of motor vehicles.