Continuous circumference diffuser reaction canister

• US 5,609,354 A
• Filed: 12/18/1995
• Issued: 03/11/1997
• Est. Priority Date: 02/24/1992
• Status: Expired due to Term

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Morton International Incorporated (Autoliv Incorporated)
• Inventors: Smith, Bradley W., Lauritzen, Donald R.
• Primary Examiner(s): Johnson, Brian L.
• Assistant Examiner(s): English, Peter C.
• Application Number:
  US08/574,171
• Time in Patent Office: 449 Days
• Field of Search: 280/728.2, 280/732, 280/728.1, 280/728.3, 280/736, 280/740, 280/741, 280/743.1, 248/99, 248/101, 220/404
• US Class Current: 280/728.2
• CPC Class Codes: B60R 21/201 Packaging straps or envelopes for inflatable members
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence
• CPC Class Codes: B60R 21/276 with means to vent the inflation fluid source, e.g. in case of overpressure B60R21/30 takes precedence; venting means on inflatable member walls B60R21/239

Abstract

A one piece reaction canister having a cover, a top panel and a bottom panel, a diffuser tube having a diffuser portion and a cap portion and formed in one piece with the top and bottom panels, end plates attached to the ends of the diffuser tube and the top and bottom panels, and a thrust neutral inflator supported by openings formed in the end plates, with the top and bottom panels extending in one piece to the cover from the diffuser and cap portions of the diffuser tube.

Claims

1. An air bag module comprising:

an extruded reaction canister, said reaction canister including a diffuser tube and extending sides, characterized in that said diffuser tube is formed in one piece with said extending sides, said diffuser tube including a portion situated at a designated position along each side integrally extending between the sides, the sides and the diffuser tube forming an open ended receptacle capable of receiving an inflator to inflate an associated air bag;

each side, at a rearwardly located edge thereof, includes a first slot, said reaction canister further includes a second slot located generally at the juncture of said diffuser portion and each side,

an inflatable air bag, said air bag including a generated gas inlet opening having a looped portion of air bag material formed at opposite sides thereof, a rod fitted into each looped portion, each rod and associated looped portion are positioned in one of the corresponding second slots, the remaining portions of the air bag being positioned in the space between said sides and said diffuser portion, and

a cover for said reaction canister, said cover being positioned adjacent said first slots that are provided at the rearwardly located edges of said reaction canister sides.

2. The apparatus as defined in claim 1, wherein said reaction canister includes end plates which enclose said receptacle, join ends of each of the reaction canister sides, and support an inflator.

3. The apparatus, as defined in claim 2, and wherein, in order to allow said inflator to be inserted in said open ended receptacle as a last operation in the assembly of said air bag module, a flange is provided on a first end of said inflator and a threaded fastener is provided on the second end thereof, a circular opening is provided in one of said end plates and a smaller opening is provided in the other of said end plates, the size of the circular opening in said one end plate being such as to allow said inflator to be inserted in a snug fit from the second end thereof, and the size of the opening in said other end plate is such as to snugly receive said threaded fastener of said inflator.

4. An air bag module comprising:

an extruded reaction canister including a top panel and a bottom panel and a diffuser tube having a diffuser portion and a cap portion and situated at a designated position along each of said top panel and said bottom panel, said top and bottom panels each having an edge that is rearwardly located with respect to said diffuser tube, with said diffuser portion and said cap portion forming an open ended receptacle that is capable of receiving an inflator to inflate an associated air bag and characterized in that said diffuser portion and said cap portion are formed in one piece with said top panel and said bottom panel of said reaction canister, each said top panel and said bottom panel includes a first slot that is provided at the rearwardly located edge of said top panel and said bottom panel, said reaction canister further includes a second slot located generally at the juncture of said diffuser portion and each said top panel and said bottom panel,

an inflatable air bag, said air bag including a generated gas inlet opening having a looped portion of air bag material formed at opposite sides thereof, a rod fitted into each looped portion, each rod and associated looped portion are positioned in one of the corresponding said second slots, the remaining portions of said air bag being positioned in the space defined by said top panel and said bottom panel and said diffuser portion, and

a cover for said reaction canister, said cover being positioned adjacent to said first slots that are provided at the rearwardly located edges of said top panel and said bottom panel.

5. The apparatus, as defined in claim 4, wherein said reaction canister includes end plates that are attached to the edges of the top panel and the bottom panel, which end plates enclose the open ended receptacle formed in said diffuser tube by said diffuser portion and said cap portion, and support an inflator.

6. The apparatus, as defined in claim 5, further including an inflator,

wherein a flange is provided on a first end of said inflator and a threaded fastener is provided on the second end thereof, a circular opening is provided in one of said end plates and a smaller opening is provided in the other of said end plates, the size of the opening in said one end plate being such as to allow said inflator to be inserted in snug fit from the second end thereof, and the size of the opening in said other end plate is such as to snugly receive said threaded fastener of said inflator,

whereby said inflator may be inserted in said open ended receptacle as a last operation of assembly of said air bag module.

7. An air bag module comprising:

an inflator and an extruded reaction canister and diffuser for a motor vehicle inflatable restraint system characterized in that said reaction canister has a cover, a top panel and a bottom panel, and said diffuser comprises a diffuser tube having a diffuser portion and a cap portion and characterized in that said diffuser and cap portions are formed in one piece with said top panel and said bottom panel of said reaction canister and form an open ended receptacle in which said inflator is positioned to inflate an associated air bag, and further characterized in that said top panel and said bottom panel extend in one piece to said cover from said diffuser and cap portions of said diffuser tube, and said reaction canister further includes air bag attachment slots located generally at the juncture of said diffuser portion and each said top panel and said bottom panel, and

an inflatable air bag, said air bag including a generated gas inlet opening having a looped portion of air bag material formed at opposite sides thereof, a rod fitted into each looped portion, each rod and associated looped portion are positioned in one of said air bag attachment slots, the remaining portions of said air bag being positioned between said top panel and said bottom panel and between said diffuser and said cover.

8. An air bag module, as defined in claim 7,

wherein said reaction canister further includes end plates which enclose said receptacle, join ends of each of said top panel and of said bottom panel and support said inflator.

9. An air bag module, as defined by claim 7,

wherein said inflator has an elongated cylindrical shape and includes a gas flow outlet arrangement that renders said inflator substantially thrust neutral.