Patent ID: 8393274

Claim:
A gas generator for a safety device for a motor vehicle, the gas generator comprising: a tubular casing having a first end and a second end, the first end being open, the second end being closed off by a bottom, the tubular casing defining a plurality of discharge orifices; an adapter sleeve housed in the open end of the tubular casing and axially retained in the casing; a pyrotechnic initiator axially mounted in the inside of the adapter sleeve and fixedly maintained in the adapter sleeve; a tubular filter disposed inside the closed end of the casing so as to cover the discharge orifices, the tubular filter defining a hollow interior; a pyrotechnic charge including a plurality of bulk elements inside the tubular casing axially between the adapter sleeve and the bottom; a tubular case disposed in the tubular casing encapsulating the pyrotechnic charge prior to combustion of the pyrotechnic charge, the case co-axially oriented relative to the tubular filter; and a securing part sealing an open end of the case; wherein a transverse end wall of the case is proximate the tubular filter and adapted to at least partially fail and open upon initial combustion of the pyrotechnic charge, thereby allowing the gases generated by combustion of the pyrotechnic charge to escape out of the casing, via the wall of the filter and the discharge orifices, and in that after the at least partial failure and opening of the case, an open space occupied by the pyrotechnic charge is axially delimited only by the securing part and the bottom of the tubular casing.