Gas generator for a safety device for a motor vehicle

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, a circumferential wall portion of the casing located proximate the bottom being crossed by discharge orifices,
• an adapter sleeve housed in the open end of the tubular casing and axially retained in the casing by crimping;
• 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;
• a pyrotechnic charge including a plurality of bulk elements housed inside the tubular casing between the adapter sleeve and the bottom;
• means for confining and securing, along the axial direction, the plurality of bulk elements making up the pyrotechnic charge, the means for confining and securing including on a side of the bottom, a transverse partition, and on the open side, an open-worked washer urged towards the bottom in order to secure the pyrotechnic charge;
• and
• a sealing member interposed between the pyrotechnic charge and the discharge orifices, the sealing member capable of breaking upon combustion of the pyrotechnic charge, then allowing the gases generated by the 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 breaking of the sealing member, the space occupied by the pyrotechnic charge is axially delimited by the open-worked washer and the bottom.