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Pyrotechnic linear inflator

  • US 7,080,854 B2
  • Filed: 01/12/2005
  • Issued: 07/25/2006
  • Est. Priority Date: 01/13/2004
  • Status: Expired due to Fees
First Claim
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1. An inflator for use in an inflatable vehicle occupant protection system comprising:

  • a longitudinal tubular enclosure having a substantially uniform cross-sectional area along at least a portion of the enclosure, said longitudinal tubular enclosure having a first tubular perforated section with a first length and a plurality of first gas exit apertures formed therealong, each first gas exit aperture of the plurality of first gas exit apertures having a substantially equal cross-sectional area, said longitudinal tubular enclosure also having a second tubular perforated section formed in collinear relation with said first tubular perforated section, said second tubular perforated section having a second length and a plurality of second gas exit apertures formed therealong, each second gas exit aperture of the plurality of second gas exit apertures having a substantially equal cross-sectional area,said first perforated tubular section containing a first gas exit aperture area per unit length thereof and said second perforated tubular section containing a second gas exit aperture area per unit length thereof, said second gas exit aperture area per unit length being greater than said first gas exit aperture area per unit length;

    a gas generant composition positioned within the at least a portion of the enclosure, the gas generant composition being distributed substantially uniformly along the at least a portion of the enclosure; and

    an igniter operably fixed to said first perforated section for ignition of said gas generant composition upon inflator activation.

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