A gas generator 10 contains a baffle assembly for cooling of gases. An imperforate housing 46 is contained within the gas generator 10 . A perforate housing 30 is contained within the imperforate housing 46 . At least one orifice 70/72 is formed within the baffle assembly, where the orifice 70/72 is formed at the juncture 57 of the baffle assembly 12 and the perforate housing 30 , at a second end of the perforate housing 30 . Upon activation of the gas generator 10 , gases produced are shunted through the orifice 70/72 and into the baffle assembly 12 for cooling and filtration thereof.
1. A gas generator comprising:
an imperforate housing having a first end and a second end;
a perforate housing contained within said imperforate housing, said perforate housing having a third end and fourth end adjacent to, and corresponding to said first end and said second end, respectively; and
a baffle assembly fixed at said second and fourth ends, said baffle assembly comprising at least one orifice adjacent said perforate housing thereby providing fluid communication between said baffle assembly and said imperforate and perforate housings;
wherein gases produced upon activation of said gas generator are toroidally shunted through said at least one orifice and into said baffle assembly, and then out of said gas generator.
2. A gas generator comprising:
a perforate body;
an imperforate housing contained within said body;
a perforate housing contained within said imperforate housing, said perforate housing containing a first end and a second end;
a baffle assembly contained within said body at said second end, in fluid communication with said body; and
at least one orifice formed at a juncture of said perforate housing and said baffle assembly,
wherein gases produced upon activation are of said gas generator are routed through said at least one orifice, then through said baffle assembly, then through said perforate body.
3. The gas generator of claim 1 wherein said baffle assembly comprises:
a first chamber in fluid communication with said orifice; and
a second chamber of greater volume than said first chamber, in fluid communication with said first chamber, for expansion of gases routed therethrough.
4. The gas generator of claim 1 wherein said baffle assembly further contains a filter.
5. The gas generator of claim 2 wherein a plenum is defined between the body and the imperforate housing.
6. A gas generating system comprising the gas generator of claim 1 .
7. A vehicle occupant protection system comprising the gas generator of claim 1 .
8. The gas generator of claim 1 wherein the baffle assembly is separate from the perforate housing, and wherein a portion of the baffle assembly is spaced apart from the perforate housing so as to define at the least one orifice therebetween.
9. The gas generator of claim 1 further comprising a perforate body having at least one gas discharge aperture formed therein to enable fluid communication between an interior of the body and an exterior of the body after activation of the gas generator, and wherein generated gases pass completely through the baffle assembly prior to reaching the at least one gas discharge aperture.
10. The gas generator of claim 2 wherein the at least one orifice enables fluid flow through said at least one orifice and into said baffle assembly prior to activation of the gas generator.