Hybrid gas generator for a side airbag applied to motor vehicle safety
First Claim
1. Hybrid gas generator used for motor vehicle safety to inflate an airbag, comprising a body containing an ignition device, and a reservoir having an elongated shape connected to the body and containing pressurized gas, together with initially closed-off discharge orifices, said body possessing:
- i) a first pyrotechnic charge capable of generating a quantity of gas which, coupled to the volume of gas contained in the reservoir, allows the airbag to be inflated in a time period of less than 50 milliseconds, and ii) a second pyrotechnic charge capable of generating a quantity of gas sufficient to keep the airbag inflated for a time period of several seconds, wherein;
a nozzle at the junction between a first end of said reservoir and said body, creates a central passage which is initially closed off by a frangible membrane, the gases generated within the body by both the first and the second pyrotechnic charges can pass through said central passage, after fracture of said frangible membrane, the first pyrotechnic charge can fracture the frangible membrane and, with the pressurized gas contained in the reservoir, open the discharge orifices, such that the pressurized gas in the reservoir and the gas generated by the first pyrotechnic charge can escape out of the reservoir at a second end of the reservoir and be discharged via the discharge orifices, in order to inflate the airbag in a time period of less than 50 milliseconds, and the gas generated by the second pyrotechnic charge can escape out of the reservoir at the second end of the reservoir and be discharged via the discharae orifices in order to keep the airbag inflated for a time period of several seconds.
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Accused Products
Abstract
The present invention relates to a hybrid gas generator (1), used for motor vehicle safety to inflate an airbag, comprising a body (2) containing an ignition device (16) and a reservoir (3) connected to the body and containing a pressurized gas (31), together with initially closed-off discharge orifices (10). The body possesses a first pyrotechnic charge (14) capable of generating a quantity of gas which, coupled to the volume of gas (31) contained in the reservoir, allows the airbag to be inflated in a time period of less than 50 milliseconds, and a second pyrotechnic charge (13) capable of generating, after combustion of the first pyrotechnic charge, a quantity of gas sufficient to keep the airbag inflated for a time period of several seconds.
23 Citations
11 Claims
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1. Hybrid gas generator used for motor vehicle safety to inflate an airbag, comprising a body containing an ignition device, and a reservoir having an elongated shape connected to the body and containing pressurized gas, together with initially closed-off discharge orifices, said body possessing:
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i) a first pyrotechnic charge capable of generating a quantity of gas which, coupled to the volume of gas contained in the reservoir, allows the airbag to be inflated in a time period of less than 50 milliseconds, and ii) a second pyrotechnic charge capable of generating a quantity of gas sufficient to keep the airbag inflated for a time period of several seconds, wherein;
a nozzle at the junction between a first end of said reservoir and said body, creates a central passage which is initially closed off by a frangible membrane, the gases generated within the body by both the first and the second pyrotechnic charges can pass through said central passage, after fracture of said frangible membrane, the first pyrotechnic charge can fracture the frangible membrane and, with the pressurized gas contained in the reservoir, open the discharge orifices, such that the pressurized gas in the reservoir and the gas generated by the first pyrotechnic charge can escape out of the reservoir at a second end of the reservoir and be discharged via the discharge orifices, in order to inflate the airbag in a time period of less than 50 milliseconds, and the gas generated by the second pyrotechnic charge can escape out of the reservoir at the second end of the reservoir and be discharged via the discharae orifices in order to keep the airbag inflated for a time period of several seconds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification
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- Resources
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Current AssigneeLivbag Snc
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Original AssigneeLivbag Snc
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InventorsLebaudy, Franck, Martin, Bernard, Rigault, François A, Perotto, Christian
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Primary Examiner(s)Ilan, Ruth
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Application NumberUS10/208,746Publication NumberTime in Patent Office978 DaysField of Search280/741, 280/737, 280/736, 280/742, 280/740, 102/530, 102/531US Class Current280/737CPC Class CodesF42B 3/045 Hybrid systems with previou...
