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Inflator with combustion chamber pressure regulator

  • US 5,700,030 A
  • Filed: 12/27/1995
  • Issued: 12/23/1997
  • Est. Priority Date: 12/27/1995
  • Status: Expired due to Fees
First Claim
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1. An apparatus for inflating an inflatable vehicle occupant protection device, said apparatus comprising:

  • a housing having a wall at least partially defining a combustion chamber, said wall having an opening through which fluid flows from the combustion chamber to inflate the protection device;

    ignitable material located in the combustion chamber to produce, upon ignition, combustion products to increase the pressure in the combustion chamber;

    a valve member movable between a first position blocking flow of fluid from the combustion chamber through the opening in said wall and a second position allowing the flow of fluid from the combustion chamber through the opening in said wall;

    biasing means urging said valve member toward the first position, said valve member having a portion against which the pressure in the combustion chamber acts to move said valve member from the first position toward the second position in response to pressure in the combustion chamber increasing above a predetermined pressure; and

    a flow directing plate and a filter in the combustion chamber between said ignitable material and said wall of said housing, said filter being located between said wall and said plate, said plate having a peripheral edge surface spaced from said housing to define a fluid flow path between said housing and said peripheral edge surface of said plate.

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