Dual stage air bag inflator

Land vehicles – Wheeled – Attachment

Patent

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Details

280741, 222 3, 102531, B60R 2126

Patent

active

057949735

ABSTRACT:
An air bag inflator (20) comprises a container (40) defining a chamber (48) for storing inflation fluid at a first pressure. A rupturable closure or rupture disk (102) extends across an opening (60) in the container (40). Each one of a pair of inflation fluid heating assemblies (122, 124) is located in the chamber (48) and includes an actuatable igniter (222) and an ignitable material (168). The igniter (222) in one inflation fluid heating assembly (122) upon actuation, ignites the ignitable material (168) in the one inflation fluid heating assembly to produce combustion products. The combustion products heat the inflation fluid and increase the pressure of the inflation fluid in the chamber (48) to a second pressure to rupture the rupture disk (102). The igniter (222) in the other inflation fluid heating assembly (124), upon actuation, ignites the ignitable material in the other inflation fluid heating assembly to produce combustion products which further heat and further increase the pressure of the inflation fluid in the chamber (48).

REFERENCES:
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patent: 3961806 (1976-06-01), Katter
patent: 3985375 (1976-10-01), Lewis et al.
patent: 4981534 (1991-01-01), Scheffe
patent: 5058921 (1991-10-01), Cuevas
patent: 5290060 (1994-03-01), Smith
patent: 5536040 (1996-07-01), Cuevas et al.
patent: 5582428 (1996-12-01), Buchanan et al.
patent: 5615912 (1997-04-01), O'Loughlin et al.
patent: 5655790 (1997-08-01), Faigle et al.
patent: 5685558 (1997-11-01), Cuevas

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