Adaptive gas generator for airbag
First Claim
Patent Images
1. A gas generator for an airbag comprising:
- at least one pressurized gas chamber;
a first actuator for opening the at least one gas pressurized gas chamber;
a diffusion chamber including a communication surface arranged for diffusing gases from the at least one pressurized gas chamber towards the airbag; and
an obturator located outside the diffusion chamber and including a second actuator, the obturator arranged so as to be locked in a first position in which the obturator and the communication surface cooperate to define a first diffusion surface area;
wherein the second actuator is arranged for unlocking the obturator in order to allow the obturator to go into a second position in which the obturator and the communication surface cooperate to define a second diffusion surface area greater than the first diffusion surface area;
wherein the obturator includes a deflector partly covering the communication surface when the obturator is in the first position, and moving away from the communication surface when the obturator passes into the second position by deforming.
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Abstract
A gas generator for a protective airbag includes at least one pressurized gas chamber, a first actuator arranged so as to open the pressurized gas chamber, and a diffusion chamber including at least one diffusion hole defining a communication surface. Outside the diffusion chamber, the gas generator includes an obturator having a second actuator. The obturator is arranged in a first position in which it defines a first diffusion surface. The second actuator is arranged so as to allow it to go into a second position in which it defines a second diffusion surface.
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Citations
15 Claims
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1. A gas generator for an airbag comprising:
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at least one pressurized gas chamber; a first actuator for opening the at least one gas pressurized gas chamber; a diffusion chamber including a communication surface arranged for diffusing gases from the at least one pressurized gas chamber towards the airbag; and an obturator located outside the diffusion chamber and including a second actuator, the obturator arranged so as to be locked in a first position in which the obturator and the communication surface cooperate to define a first diffusion surface area; wherein the second actuator is arranged for unlocking the obturator in order to allow the obturator to go into a second position in which the obturator and the communication surface cooperate to define a second diffusion surface area greater than the first diffusion surface area; wherein the obturator includes a deflector partly covering the communication surface when the obturator is in the first position, and moving away from the communication surface when the obturator passes into the second position by deforming. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A gas generator for an airbag comprising:
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at least one pressurized gas chamber; a first actuator for opening the gas pressurized gas chamber; a diffusion chamber including a communication surface arranged for diffusing gases from the at least one pressurized gas chamber towards the airbag; an obturator located outside the diffusion chamber and including a second actuator, the obturator arranged so as to be locked in a first position in which the obturator and the communication surface cooperate to define a first diffusion surface area; a deflector having a shape of a strip positioned around the diffusion chamber, and ends of the strip connected together through a breakable element; wherein the second actuator is arranged for unlocking the obturator in order to allow the obturator to go into a second position in which the obturator and the communication surface cooperate to define a second diffusion surface area greater than the first diffusion surface area; wherein the second actuator is connected to the airbag.
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13. A gas generator for an airbag comprising:
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at least one pressurized gas chamber; a first actuator for opening the gas pressurized gas chamber; a diffusion chamber including a communication surface for diffusing gases from the at least one pressurized gas chamber towards the airbag; and
an obturator including a deflector, the obturator operative in first and second positions such that in the first position the deflector partly covers the communication surface and the obturator cooperates with the communication surface for defining a first diffusion surface area and in the second position the obturator and the communication surface cooperate to define a second diffusion surface area greater than the first diffusion surface area;further comprising the deflector having a shape of a strip and positioned around the diffusion chamber; and
,wherein ends of the deflector are connected together through a breakable element. - View Dependent Claims (14, 15)
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Specification