Two-stage air bag system
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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Abstract
A two-stage air bag system which includes an air bag, a first pressure device for supplying first stage expansive pressure to the air bag when an impact is detected, a second pressure device for supplying second stage expansive pressure to the air bag and a delayed ignition signal generator responsive to the magnitude of the first stage expansive pressure for activating the second pressure device when the magnitude of the first stage expansive pressure exceeds a predetermined value.
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Citations
2 Claims
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1. A two-stage air bag system for a vehicle comprising:
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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, and a 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. - View Dependent Claims (2)
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Specification