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Dual stage air bag inflator

  • US 9,592,790 B2
  • Filed: 02/23/2015
  • Issued: 03/14/2017
  • Est. Priority Date: 12/06/2006
  • Status: Active Grant
First Claim
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1. An apparatus for providing inflation fluid for inflating an inflatable vehicle occupant protection device, the apparatus comprising:

  • a primary housing constructed from sheet metal by stamping;

    a primary inflation fluid source in the primary housing comprising a primary igniter assembly actuatable to effect a primary flow of inflation fluid out of the primary housing to inflate the inflatable device;

    a secondary housing constructed from sheet metal by stamping, the secondary housing being disposed within the primary housing such that the primary igniter assembly is positioned outside the secondary housing; and

    a secondary inflation fluid source in the secondary housing actuatable to effect a secondary flow of inflation fluid to supplement the primary flow of inflation fluid,the secondary housing having a first portion that moves at least partially out of engagement with a second portion of the secondary housing when the secondary inflation fluid source is actuated, wherein the first portion of the secondary housing comprises an upper end portion and the second portion of the secondary housing comprises an opposite lower end portion, the upper end portion comprising a cap secured to the lower end portion and abutting an inner surface of the primary housing.

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