Airbag assembly load distributing structure

• US 8,746,732 B1
• Filed: 03/15/2013
• Issued: 06/10/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Inventors: Kutchey, Michael, Schneider, David W., Witt, John F. Jr., Fritz, Jamie R.
• Primary Examiner(s): VERLEY, NICOLE T
• Application Number:
  US13/836,176
• Time in Patent Office: 452 Days
• Field of Search: 280/728.2
• US Class Current: 280/728.2
• CPC Class Codes: B60R 2021/2177 Reaction canisters characterised by material
• CPC Class Codes: B60R 21/206 in the lower part of dashboards, e.g. for protecting the knees
• 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

Abstract

An airbag assembly can include an inflator that may exert forces on an airbag housing during deployment of an airbag from the housing. The airbag assembly can include a load distributing plate to distribute or delocalize the forces. In some arrangements, the load distributing plate can be attached to the inflator.

Claims

1. An airbag assembly comprising:

a housing defining a cavity and an aperture and comprising a mounting region that is spaced from the aperture, wherein the mounting region is configured to couple the housing with a vehicle structure, wherein the housing comprises a wall that includes a recess, and wherein the aperture of the housing is defined by a portion of the housing that defines at least a portion of the recess;

an inflatable airbag positioned within the cavity of the housing;

an inflator positioned within the cavity of the housing and fluidly coupled with the airbag;

a mounting stem fixedly attached to the inflator and extending through the aperture of the housing from a position at an interior of the cavity of the housing to a position at an exterior of the housing; and

a load distributing plate attached to the mounting stem at an exterior of the housing, wherein the load distributing plate is configured to transfer a force that arises in the mounting stem when the inflator is activated to a region of the housing that is spaced from the aperture, wherein the load distributing plate is spaced from the mounting region of the housing so as not to directly transfer the force from the mounting stem to the vehicle structure, and wherein the load distributing plate comprises an attachment flange that extends into the recess and comprises a base portion that rests against a portion of the wall of the housing that is spaced from the recess.

2. The airbag assembly of claim 1, wherein the mounting region of the housing is defined by a flange at a periphery of the housing.

3. The airbag assembly of claim 2, wherein the flange defines an opening through which mounting hardware can be passed to couple the housing with a vehicle structure.

4. The airbag assembly of claim 1, wherein the mounting region is defined by a flange that extends from a wall of the housing, and wherein the aperture of the housing is defined by the wall of the housing.

5. The airbag assembly of claim 1, wherein the housing is elongated in a longitudinal direction and comprises two longitudinal ends, wherein the mounting region is at one of the longitudinal ends of the housing, and wherein the load distributing plate is coupled to the housing at a position that is spaced from each of the longitudinal ends.

6. The airbag assembly of claim 5, wherein the housing comprises an additional mounting region that is spaced from the aperture of the housing, and wherein a separate mounting region is located at each of the longitudinal ends of the housing.

7. The airbag assembly of claim 1, wherein the load distributing plate comprises an extension that is configured to interact with an exterior surface of the housing to counteract a torsional force that arise in the mounting stem when the inflator is activated.

8. The airbag assembly of claim 1, wherein the load distributing plate comprises:

a first portion that is substantially U-shaped;

a second portion that is arcuate in shape; and

a third portion that is configured to couple the load distributing plate to the airbag housing.

9. The airbag assembly of claim 8, wherein the first portion comprises a reinforcement rib.

10. The airbag assembly of claim 1, wherein the load distributing plate is stiffer than a region of the housing at which the load distributing plate is located.

11. An airbag assembly comprising:

a housing defining a cavity and comprising one or more mounting regions that are configured to couple the housing with a vehicle structure, wherein the housing comprises a wall that includes a recess, and wherein the aperture of the housing is defined by a portion of the housing that defines at least a portion of the recess;

an inflatable airbag positioned within the cavity of the housing;

an inflator positioned within the cavity of the housing and fluidly coupled with the airbag, wherein the inflator is attached to the housing; and

a load distributing plate attached to the housing at a first portion of the housing, wherein the load distributing plate comprises an attachment flange that extends into the recess and comprises a base portion that rests against a portion of the wall of the housing that is spaced from the recess, wherein the load distributing plate is configured to transfer a force that arises when the inflator is activated from the first portion of the housing to a second portion of the housing that is spaced from the first portion of the housing, and wherein the load distributing plate is configured to transfer forces solely to regions of the housing that are spaced from the one or more mounting regions.

12. The airbag assembly of claim 11, wherein the load distributing plate is at an exterior of the housing.

13. The airbag assembly of claim 11, wherein the load distributing plate is attached to the inflator.

14. The airbag assembly of claim 11, further comprising a mounting stem configured to couple the inflator to the housing and to the load distributing plate.

15. The airbag assembly of claim 11, wherein the one or more mounting regions comprise one or more mounting flanges that define openings through which hardware can be inserted.

16. The airbag assembly of claim 11, wherein the load distributing plate comprises an attachment flange and base portion, wherein the attachment flange is directly attached to the housing.

17. An airbag assembly comprising:

a housing defining a cavity and comprising a mounting region that is spaced from the aperture, wherein the mounting region is configured to couple the housing with a vehicle structure;

an inflatable airbag positioned within the cavity of the housing;

an inflator positioned within the cavity of the housing and fluidly coupled with the airbag;

a first mounting stem and a second mounting stem that are each fixedly attached to the inflator and extend through the housing from an interior of the cavity of the housing to an exterior of the housing; and

a load distributing plate attached to the first mounting stem but not the second mounting stem, wherein the load distributing plate is configured to transfer a force that arises in the first mounting stem when the inflator is activated to a region of the housing that is spaced from the first mounting stem, and wherein the load distributing plate is spaced from the mounting region of the housing so as not to directly transfer the force from the first mounting stem to the vehicle structure.

18. The airbag assembly of claim 17, wherein the housing is elongated in a longitudinal direction between two longitudinal ends, and wherein the first mounting stem is closer to a longitudinal center of the housing than is the second mounting stem.

19. The airbag assembly of claim 17, wherein the inflator comprises a plurality of ports through which inflation gases are permitted to exit the inflator, and wherein the first mounting stem is closer to the plurality of ports than is the second mounting stem.