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Two-stage air bag system

  • US 4,213,635 A
  • Filed: 11/13/1978
  • Issued: 07/22/1980
  • Est. Priority Date: 11/13/1978
  • Status: Expired due to Term
First Claim
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1. A two-stage air bag system for a vehicle comprising:

  • a housing having one open end, said housing further being divided into two chambers which are adjacent to each other;

    a first pressure device comprising a solid gas producing material provided in one of the two chambers;

    a second pressure device comprising a solid gas producing material provided in another one of the two chambers;

    a first ignition means for igniting said solid material at the first pressure device, said means causing ignition when an emergency condition occurs;

    a filter means provided on said housing enclosing said open ends;

    an air bag coupled to said housing about said open ends;

    a delayed ignition signal generator being provided in said solid gas producing material of said first pressure device in one of said chambers, said delay ignition signal generator comprising a switch means that turns on when a pressure generated by said gas producing material of said first pressure device applied to said switch means exceeds a predetermined value, said switch means comprising;

    a case,a movable contact slidably disposed in said case,a fixed contact provided in said case, anda spring means for biasing said movable contact away from said fixed contact; and

    a second ignition means responsive to said delayed ignition signal generator for igniting said solid material of said second pressure device.

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