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AssigneeSeva Technologies
InventorsDaniel Duvacquier, Xavier Lelievre, Yvonnig Patton, François Peremarty
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A gas generator for a safety device for a motor vehicle, comprises at least two distinct chambers which communicate with each other through at least one opening or nozzle. A first chamber is isolated from the outside. A second chamber or “diffusion” chamber is able to receive gases generated by the combustion of a solid pyrotechnical charge placed in the first chamber, and to discharge them towards the outside. The solid charge is a mixture consisting of at least one oxidizing charge and a reducing charge, the oxygen balance of which is equilibrated. A heat generator is provided which generates sufficient heat for triggering and sustaining the combustion of the charge without any other interaction, notably of the chemical type, between the heat generator and the charge.
A gas generator for a safety device for a motor vehicle, the gas generator comprising:
A gas generator for a safety device for a motor vehicle, the gas generator comprising:
Dependencies are inferred from the claim text.
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Using instantaneous generation of gas, e.g. pyrotechnic: using only solid reacting substances, e.g. pellets, powder
Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets: by reaction of two or more solids
Blasting cartridges, i.e. case and explosive: for producing gas under pressure
Using instantaneous generation of gas, e.g. pyrotechnic: comprising a plurality of combustion chambers or sub-chambers
About 2 years 11 months of term left · ends 5 Oct 2029 (estimated)
This application is a 371 U.S. National Stage of International Application No. PCT/EP2009/000883, filed Feb. 9, 2009. This application claims the benefit of French Patent Application No. FR 08 50781, filed Feb. 7, 2008. The disclosures of the above applications are incorporated herein by reference.
The present invention relates to a gas generator for a safety device for a motor vehicle.
It is used in particular for inflating an air bag, in particular for frontal or lateral protection.
Other characteristics and advantages of the present invention will emerge from the following detailed description, given in reference to the attached diagrams, in which:
FIG. 1 is a highly simplified diagram of a gas generator, of tubular shape, according to the invention;
FIG. 2 is likewise a highly simplified diagram of another embodiment of this generator;
The generator illustrated in the attached FIG. 1 is a generally known structure.
In this case, it is a generator 1 of tubular type, for example a metallic envelope, which is compartmented into three chambers 2, 3 and 4 placed successively after one another.
They communicate with one another via openings or nozzles, not shown here, formed in walls which separate each one from each other.