Inflator for side impact air bag
First Claim
1. An air bag inflator comprising:
- first and second coaxial tubes defining respective first and second chambers, each of said first and second tubes having terminal ends, said first chamber containing inflation fluid under pressure, said second tube having a passage for directing inflation fluid from the second chamber into an air bag;
a weld securement fixing said terminal ends together with said first and second tubes extending in opposite directions from said securement;
a rupturable wall blocking fluid communication between said first and second chambers;
a canister in said second chamber having a movable section to rupture said wall upon moving a predetermined distance to enable inflation fluid to flow from said first chamber into said second chamber; and
energizable initiator means located in said canister for, when energized, causing said movable section to move the predetermined distance.
4 Assignments
0 Petitions
Accused Products
Abstract
An air bag inflator (20, 220, 420) comprises first and second coaxial tubes (22, 24, 222, 224, 422, 424) which define respective first and second chambers (62, 64, 262, 264, 462, 464). The tubes (22, 24, 222, 224, 422, 424) have terminal ends (42, 44, 242, 244). A weld securement (46, 246, 446) fixes the terminal ends (42, 44, 242, 244) of the tubes (22, 24, 222, 224, 422, 424) together so the chambers (62, 64, 262, 264, 462, 464) extend in opposite directions from the securement (46, 246, 446). The first chamber (62, 262, 462) contains inflation fluid under pressure. The second tube (64, 264, 464) has passages (82, 282, 482) for directing inflation fluid from the first chamber (62, 262, 462) into an air bag. A rupturable wall (66, 266, 466) blocks fluid communication between the first and second chambers (62, 64, 262, 264, 462, 464). A canister (102, 302, 502) in the second chamber (64, 264, 464) has a section which moves to rupture the wall (66, 266, 466) to enable the inflation fluid to flow from the first chamber (62, 262, 462) into the second chamber (64, 264, 464). An energizable initiator (142, 342, 542) is located in the second chamber (64, 264, 464) to, when energized, move the movable section of the canister to rupture the wall (66, 266, 466).
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Citations
31 Claims
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1. An air bag inflator comprising:
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first and second coaxial tubes defining respective first and second chambers, each of said first and second tubes having terminal ends, said first chamber containing inflation fluid under pressure, said second tube having a passage for directing inflation fluid from the second chamber into an air bag; a weld securement fixing said terminal ends together with said first and second tubes extending in opposite directions from said securement; a rupturable wall blocking fluid communication between said first and second chambers; a canister in said second chamber having a movable section to rupture said wall upon moving a predetermined distance to enable inflation fluid to flow from said first chamber into said second chamber; and energizable initiator means located in said canister for, when energized, causing said movable section to move the predetermined distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An air bag inflator comprising:
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first and second tubes defining respective first and second chambers, said tubes having terminal ends, said first chamber being a closed chamber containing inflation fluid under pressure, said second tube having passages for directing the inflation fluid into an air bag; a weld securement fixing said terminal ends together with said chambers extending in opposite directions from said securement; movable means in said second chamber for opening said first chamber, upon moving a predetermined distance, to enable the inflation fluid to flow from said first chamber into said second chamber; and energizable initiator means located in said second chamber for, when energized, effecting movement of said movable means. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An air bag inflator comprising:
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first and second coaxial tubes defining respective first and second chambers, said tubes having terminal ends, said terminal ends being fixed together, and said first and second tubes extending in opposite directions from their respective terminal ends; said first chamber being a closed chamber containing inflation fluid under pressure; said second tube having openings for directing inflation fluid from said second chamber into an air bag; actuatable means in said second chamber for, when actuated, effecting the opening of said first chamber to enable the inflation fluid to flow from said first chamber to said second chamber; and energizable initiator means located in said second chamber for, when energized, actuating said actuatable means.
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31. An air bag inflator comprising:
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first and second tubes defining respective first and second chambers, said tubes having terminal ends, said first chamber being a closed chamber containing inflation fluid under pressure, said second tube having passages for directing the inflation fluid into an air bag; a weld securement fixing said terminal ends together with said chambers extending in opposite directions from said securement; movable means in said second chamber for opening said first chamber, upon movement, to enable the inflation fluid to flow from said first chamber into said second chamber; ignitable material in said second chamber which, when ignited, effects movement of said movable means and heats the inflation fluid; and energizable initiator means located in said second chamber for, when energized, igniting said ignitable material.
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Specification