Patent ID: 6206418
Filing Date: 2001-03-27
Classification: B60R,F42B

Abstract:
Hybrid gas-generator intended in particular for inflating a protective cushion, comprising a gastight space containing a reservoir chamber filled with a pressurized gas and a combustion and mixing chamber in which an ignition device and a solid pyrotechnic charge are arranged, said charge having a burn time, which is from the time of ignition until the time of complete consumption of said charge and being completely consumable upon being ignited, and said space having, in the region of said combustion and mixing chamber, at least one discharge hole closed by a breakable diaphragm, said reservoir chamber and said combustion and mixing chamber being separated from each other by a wall, said wall having a cylindrical neck and being inside said space, said wall having at least one opening allowing the gas contained in said reservoir chamber to be discharged in a time that is approximately equal to said burn time of the pyrotechnic charge, said pyrotechnic charge being within said cylindrical neck, said gas-generator being characterized in that:i) said space being defined by a cylindrical housing, said cylindrical housing comprising a side wall attached at one end to an end wall and terminating at a free end located opposite to said attachment at said one end wall, said cylindrical housing forming just one and the same piece being closed by a closure ring crimped into said free end of said housing;ii) said closure ring having a central circular hole extended by a hollow cylindrical neck in which said ignition device is inserted; andiii) said pyrotechnic charge burns without producing solid residues and is in the form of a block.