Societe Nationale Des Poudres Et Explosifs

Livbag S.n.c.

Bernard Martin

Christian B Perotto

Franck Lebaudy

Alain Lefumeux

François A Rigault

The present invention relates to a hybrid gas generator (), used for motor vehicle safety to inflate an airbag, comprising a body () containing an ignition device () and a reservoir () connected to the body and containing a pressurized gas (), together with initially closed-off discharge orifices (). The body possesses a first pyrotechnic charge () capable of generating a quantity of gas which, coupled to the volume of gas () contained in the reservoir, allows the airbag to be inflated in a time period of less than 50 milliseconds, and a second pyrotechnic charge () capable of generating, after combustion of the first pyrotechnic charge, a quantity of gas sufficient to keep the airbag inflated for a time period of several seconds.

Hybrid gas generator for a side airbag applied to motor vehicle safety

The present invention relates to low-vulnerability propellent powders for weapons. The powders according to the invention consist of at least one organic nitro compound and an organic binder and are characterized in that they contain at least one additive chosen from the group consisting of lithium fluoride, ammonium fluoride and lithium nitrate, optionally in the presence of acetylene black. The powders according to the invention exhibit good ignition characteristics while retaining low vulnerability to impacts and to thermal shocks.

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Ballancourt, France

Bernard Martin