Gas generator for an air bag
First Claim
1. A gas generator for an airbag, comprising two combinations of an ignition means and a combustion chamber including a gas generating agent, the two ignition means capable of being activated separately from each other with a time lag, the gas generator having a structure such that part of the combustion gas possibly flows from a gas discharge passage into the other combustion chamber in a procedure where one of the ignition means is activated first, the gas generating agent in one of the combustion chambers is ignited and burnt first to generate a combustion gas and the combustion gas flows in the gas discharge passage and is discharged from a gas discharge port to inflate an air bag, at least one flame-transferring preventing means being provided at a given position in the passage where the combustion gas flows from the gas discharge passage into the other combustion chamber for obstructing direct advance of the combustion gas flow.
1 Assignment
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Accused Products
Abstract
A gas generator for an airbag producing no malfunction is provided.
When the first combustion gas generated in the first combustion chamber 30 enters the filter chamber 50, most of the gas is discharged through the gas discharge port 52, however, part of the combustion gas flows into the second through hole 62. This combustion gas flows through the vent hole 76 into the second combustion chamber 40 after changes its flow direction by the gas-flow inhibiting member 80 inside the second cap member 75. At this time, the temperature of the gas is lowered, so that the second gas generating agent 43 is never burnt.
18 Citations
17 Claims
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1. A gas generator for an airbag, comprising two combinations of an ignition means and a combustion chamber including a gas generating agent, the two ignition means capable of being activated separately from each other with a time lag,
the gas generator having a structure such that part of the combustion gas possibly flows from a gas discharge passage into the other combustion chamber in a procedure where one of the ignition means is activated first, the gas generating agent in one of the combustion chambers is ignited and burnt first to generate a combustion gas and the combustion gas flows in the gas discharge passage and is discharged from a gas discharge port to inflate an air bag, at least one flame-transferring preventing means being provided at a given position in the passage where the combustion gas flows from the gas discharge passage into the other combustion chamber for obstructing direct advance of the combustion gas flow.
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7. A gas generator for an airbag, comprising a first ignition means and a first combustion chamber accommodating a first gas generating agent in one end side of a cylindrical housing, and a second ignition means and a second combustion chamber accommodating a second gas generating agent in the other end side of a cylindrical housing,
a first partition wall having a first through hole and a second partition wall having a second through hole defining a separated space between the first combustion chamber and the second combustion chamber, a space formed between the first partition wall and the second partition wall including a filter chamber provided with a cylindrical filter, the cylindrical housing having a gas discharge port provided in the surface directly facing the cylindrical filter, a cap member being provided as a flame-transferring preventing means in the second combustion chamber, the cap member having a ceiling surface and a side surface having a plurality of vent holes, provided with an opening portion in the opposite side of the ceiling surface, the cap member covering the second through hole from the opening portion side, being fixed onto the second partition wall.
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14. A gas generator for an airbag, comprising a first ignition means and a first combustion chamber accommodating a first gas generating agent in one end side of a cylindrical housing, and a second ignition means and a second combustion chamber accommodating a second gas generating agent in the other end side of a cylindrical housing,
a first partition wall having a first through hole and a second partition wall having a second through hole defining a separated space between the first combustion chamber and the second combustion chamber, a space formed between the first partition wall and the second partition wall including a filter chamber provided with a cylindrical filter, the cylindrical housing having a gas discharge port provided in the surface directly facing the cylindrical filter, wherein at least one gas flow diversion members being disposed in the filter chamber to forcibly make the combustion gas flow enter the cylindrical filter when the combustion gas generated in the first combustion chamber flows into the filter chamber from the first through hole.
Specification