Patent ID: 6460461
Filing Date: 2002-10-08
Classification: B60R

Abstract:
Hybrid gas generator (1) comprising a tubular body (2) with an upstream end (3) closed by a pyrotechnic primer and hot-gas-generating device (4) and a downstream end (21) which is closed in a gastight manner, the said tubular body also having gas outlet orifices (25) and containing an internal partition (26) with a central orifice (27), of cross section S closed by a diaphragm (28), the said partition dividing the said tubular body into two parts:an upstream part forming a combustion and mixing chamber (46) and containing the pyrotechnic device and the gas outlet orifices, a downstream part forming a reservoir chamber (29) containing at least one pressurized gas, characterized in that the said tubular body consists of two cylindrical tubes (50, 51) joined together by one of their ends, the said partition (26) being of one piece with one of the two tubes, and in that the said body, in its upstream part, between the pyrotechnic device and the said internal partition (26), contains a support piece (30) which is fixed to the said body without coming into contact with the said internal partition or with the said gas outlet orifices and which contains a solid mobile piston (31) consisting of at least one column (32) of cross section s, smaller than the cross section S, which rests against the diaphragm (28), closing the central orifice (27) of the internal partition (26), the said column (32), at its opposite end to the said partition, having a solid base (41) of cross section So larger than S and which bears peripheral ribs (45) preventing the said base (41) from coming into contact with the said central orifice (27).