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Dual stage air bag inflator with toroidal chamber for combustible gas mixture

  • US 5,566,976 A
  • Filed: 09/01/1995
  • Issued: 10/22/1996
  • Est. Priority Date: 09/01/1995
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • an inflatable air bag;

    a container defining a chamber;

    a mixture of gases in the chamber and comprising a combustible fuel gas portion and a noncombustible inflation gas portion;

    an outlet passage in said container for providing fluid communication through a flow area between the chamber and the air bag, said outlet passage being initially blocked to prevent fluid flow through said outlet passage;

    an actuatable first initiator for, when actuated, effecting the ignition of the combustible fuel gas portion of the mixture of gases to unblock said outlet passage and allow gas to flow into said air bag; and

    an actuatable second initiator for, when actuated, changing the flow area defined by said outlet passage.

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