Pyrotechnic actuator equipped with a charge comprising an oxidant and a reducing agent which are separate
AssigneePyroalliance
InventorsChristian Perut, Pierre Humbert, Michael Mamou, Antoine Roussy
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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.
Claims17
Gas-generating actuator comprising an ignition system and an energetic charge, characterized in that the said charge is made up of a reducing material and of an oxidizing fluid which are separate.
Actuator according to claim 7, characterized in that the block has, passing longitudinally through it, a central duct exhibiting at least three mutually parallel longitudinal grooves uniformly distributed around the said duct.
Actuator according to claim 11, characterized in that the oxidant is brought into contact with the reducing material after the surface of the said material has been heated, so as to bring about a pyrolysis reaction, and the gases thus emitted are conveyed out of the said actuator by means of an outlet pipe.
Actuator according to claim 12, characterized in that the gases produced by the pyrolysis reaction between the reducing material and the oxidant are cooled by means of a parallel circuit comprising a cooling liquid.
Actuator according to claim 13, characterized in that the circuit comprises, in succession, an expansion chamber comprising the gas outlet pipe, a reserve of cooling liquid and a connecting pipe connecting the said reserve and the said outlet pipe, the said connecting pipe being fitted with a pyrotechnic valve.
Actuator according to claim 14, characterized in that the expansion chamber, which has a moving wall in contact with the cooling liquid, is capable of expanding under the effect of the gases produced by the pyrolysis, thereby exerting pressure on the cooling liquid.
Actuator according to claim 16, characterized in that the gases emitted by the pyrolysis reaction between the oxidant (102) and the reducing material are routed towards a buffer volume opening onto a ram equipped with a piston.
Dependencies are inferred from the claim text.