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Gas generator for inflating a safety bag

  • US 5,009,855 A
  • Filed: 10/17/1989
  • Issued: 04/23/1991
  • Est. Priority Date: 10/17/1988
  • Status: Expired due to Term
First Claim
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1. A gas generator for inflating a safety bag, comprising a combustion chamber, fuel in said combustion chamber, ignition means including at least one ignition opening between said ignition means and said combustion chamber, whereby said combustion chamber communicates with said ignition means through said at least one ignition opening for igniting said fuel, at least one gas exit opening communicating with said combustion chamber for permitting gas generated in said combustion chamber to exit from said combustion chamber, a sheet metal insert in said combustion chamber for separating said combustion chamber into a first smaller combustion chamber section communicating with said at least one ignition opening and a second larger combustion chamber section communicating with said exit opening and with said first combustion chamber section, said sheet metal insert being positioned in said combustion chamber for separating said fuel into two portions for a sequential combustion in said second combustion chamber section after combustion in said first combustion chamber section, said sheet metal insert being further positioned to provide a gas flow passage (14, 23, 36) between said first smaller and said second larger combustion chamber sections, said sheet metal insert being spaced from said at least one ignition opening thus providing a continuous flow communication between said first and second combustion chamber sections, wherein said second combustion chamber section holds a quantity of fuel larger than is held in said first combustion chamber section, wherein said quantity of fuel in said first combustion chamber section is ignited and combusted first and wherein said quantity of fuel in said second combustion chamber section is ignited by combusted gas flowing from said first combustion chamber section into said second combustion chamber section, whereby said sequential combustion is achieved by a single ignition of said ignition means for generating a gentle initial inflating pressure by the combustion of said quantity of fuel in said first combustion chamber section followed by a rapid pressure increase by the combustion of said quantity of fuel in said second combustion chamber section for a complete inflation of said safety bag.

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