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Gas generator formed with electron beam welding

  • US 5,624,134 A
  • Filed: 06/14/1995
  • Issued: 04/29/1997
  • Est. Priority Date: 04/15/1992
  • Status: Expired due to Fees
First Claim
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1. A gas generator for an air bag comprising:

  • a housing comprising;

    a diffuser shell comprising;

    a first annular portion having a first peripheral edge,a center cylindrical wall extending from the first annular portion to define a center chamber, the center cylindrical wall comprising;

    an end portion,a caulking portion constructed and arranged at the end portion for sealing the center chamber,a step portion formed on the center cylindrical wall,an intermediate cylindrical wall extending from the first annular portion to define an intermediate closed chamber arranged concentrically about the center cylindrical wall;

    a closure shell comprising;

    a second annular portion extending to a sidewall terminating in a second peripheral edge,an aperture extending through the second annular portion for receiving the step portion of the center cylindrical wall,at least one gas discharge port extending through the sidewall,a first weld to join the diffuser shell with the closure shell, the first weld formed to extend from an exterior surface of the second annular portion of the closure shell to the center cylindrical wall of the diffuser shell along a first line where the second annular portion and the center cylindrical wall are in perpendicular abutment at a junction of the step portion and the second annular portion adjacent to the aperture,a second weld formed to extend from the exterior surface of the second annular portion of the closure shell to the intermediate cylindrical wall of the diffuser shell,a third weld formed to extend from an exterior surface Of the first peripheral edge of the first annular portion of the diffuser shell to the second peripheral edge of the sidewall; and

    a coolant and filter chamber disposed between the sidewall and the intermediate cylindrical wall, the coolant and filter chamber comprising;

    a retainer disposed within the coolant and filter chamber to separate the chamber into a first stage for a filter and a second stage for a coolant.

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