Airbag inflator retention tabs

• US 5,615,907 A
• Filed: 06/25/1996
• Issued: 04/01/1997
• Est. Priority Date: 06/25/1996
• Status: Expired due to Fees

• Current Assignee: Autoliv ASP Incorporated (Autoliv Incorporated)
• Original Assignee: Morton International Incorporated (Autoliv Incorporated)
• Inventors: Stanger, Randy M.
• Primary Examiner(s): Ellis, Christopher P.
• Application Number:
  US08/670,007
• Time in Patent Office: 280 Days
• Field of Search: 280/728.2, 280/731, 280/729.1
• US Class Current: 280/728.2
• CPC Class Codes: B60R 21/217 Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together

Abstract

A module housing for mounting an airbag inflator, having a cylindrical sidewall and a inflator flange extending radially outwardly from the cylindrical sidewall, within an airbag module. The module housing includes a module baseplate having a bottom surface and defining a generally circular inflator-receiving aperture sized to receive the cylindrical sidewall of the airbag inflator with the inflator flange of the airbag inflator butting against the bottom surface of the module baseplate. Two opposing, resiliently bendable retention tabs are positioned around the inflator-receiving opening for clamping the inflator flange against the bottom surface of the module baseplate to retain the airbag inflator within the module housing prior to and during assembly of the airbag module, and during disassembly of the airbag module.

Claims

1. A module housing for mounting an airbag inflator within an airbag module, the airbag inflator having a cylindrical sidewall and a inflator flange extending radially outwardly from the cylindrical sidewall, the module housing comprising:

A) a module baseplate having a bottom surface and defining an inflator-receiving aperture sized to receive the cylindrical sidewall of the airbag inflator with the inflator flange of the airbag inflator butting against the bottom surface of the module baseplate; and

B) a plurality of resiliently bendable retention tabs extending from the bottom surface of the module baseplate around the inflator-receiving aperture for deflecting and then clamping the inflator flange against the bottom surface of the module baseplate when the airbag inflator is inserted into the inflator-receiving aperture and wherein each retention tab has an upper tab portion extending downwardly from the bottom surface of the module baseplate and radially inwardly towards the inflator-receiving aperture to a lower tab portion extending upwardly from the upper tab portion and also radially inwardly toward the inflator-receiving aperture to a distal end of the retention tab, the distal ends of each of the retention tabs spaced apart from the bottom surface of the module baseplate less than a thickness of the inflator flange.

2. A module housing as defined in claim 1 wherein the plurality of resiliently bendable retention tabs comprise at least two generally opposed, retention tabs, the at least two opposed retention tabs spaced radially outwardly from the inflator-receiving aperture so that when the airbag inflator is inserted into the inflator-receiving aperture, the inflator flange will contact the retention tabs forcing the retention tabs to bend radially outwardly from the inflator-receiving aperture so that the inflator flange may pass by the retention tabs and butt against the bottom surface of the module baseplate, and once the inflator flange has passed the retention tabs, the retention tabs will resiliently bend inwardly towards their original positions to clamp the inflator flange against the module baseplate and retain the airbag inflator within the module housing.

3. A module housing as defined in claim 1 wherein the plurality of resiliently bendable retention tabs comprise at least two opposed retention tabs spaced radially outwardly from the inflator-receiving aperture so that as the airbag inflator is inserted into the inflator-receiving aperture, the inflator flange will contact the lower portions of the retention tabs and force the lower portions and, in turn, the upper portions to bend radially outwardly from the inflator-receiving aperture with the distal ends of the retainer tabs moving radially outwardly from the inflator-receiving aperture and also downwardly away from the bottom surface of the module baseplate, so that the inflator flange may then pass by the distal ends and butt against the bottom surface of the module baseplate, and once the inflator flange has passed the distal ends of the retention tabs, the upper portions and the lower portions of the retention tabs will resiliently bend inwardly towards their original positions with the distal ends moving radially inwardly towards the inflator-receiving aperture and also upwardly towards the bottom surface of the module baseplate to clamp the inflator flange against the module baseplate.

4. A module housing as defined in claim 3 wherein the retention tabs are unitary with the module baseplate.

5. A module housing as defined in claim 3 further comprising a module sidewall extending upwardly from an outer edge of the module baseplate to an outwardly curled rim defining an open top of the module housing.

6. A module housing as defined in claim 3 wherein the module baseplate is generally rectangular and the inflator-receiving aperture is generally circular.

7. An airbag module comprising:

A) airbag inflator having a cylindrical sidewall and a inflator flange extending radially outwardly from the cylindrical sidewall;

B) a module housing comprising;

a module baseplate having a top surface and a bottom surface, the module baseplate defining an inflator-receiving aperture around the cylindrical sidewall of the airbag inflator with the inflator flange of the airbag inflator butting against the bottom surface of the module baseplate; and

a plurality of resiliently bendable retention tabs extending from the bottom surface of the module baseplate around the inflator-receiving aperture wherein the plurality of resiliently bendable retention tabs comprise at least two retention tabs and wherein each of the at least two retention tabs includes an upper tab portion extending downwardly from the bottom surface of the module baseplate and radially inwardly toward the inflator-receiving aperture to a lower tab portion extending upwardly from the upper portion and radially inwardly toward the inflator-receiving aperture to a distal end of the retention tab, the distal ends of the at least two retention tabs spaced apart from the bottom surface of the module baseplate less than a thickness of the inflator flange, each of the distal ends of the at least two generally opposed retention tabs clamping the inflator flange against the bottom surface of the module baseplate and retaining the inflator within the inflator-receiving aperture;

C) an inflatable, folded airbag cushion having a collar defining an open mouth receiving the cylindrical sidewall of the airbag inflator;

D) means for securing the collar of the airbag cushion and the inflator flange to the baseplate; and

E) an airbag module cover secured to the module housing covering the folded airbag cushion.

8. An airbag module as defined in claim 7 wherein the retention tabs of the module housing are unitary with the module baseplate.

9. An airbag module as defined in claim 7 wherein the module housing further comprises a module sidewall extending upwardly from an outer edge of the module baseplate to an outwardly curled rim defining an open top of the module housing.

10. An airbag module as defined in claim 7 wherein the module baseplate of the module housing is generally rectangular and the inflator-receiving aperture is generally circular.

11. An airbag module comprising:

A) an airbag inflator having a cylindrical sidewall and a inflator flange extending radially outwardly from the cylindrical sidewall;

B) a module housing comprising;

a module baseplate having a top surface and a bottom surface, the module baseplate defining an inflator-receiving aperture around the cylindrical sidewall of the airbag inflator with the inflator flange of the airbag inflator butting against the bottom surface of the module baseplate; and

a plurality of resiliently bendable retention tabs extending from the bottom surface of the module baseplate around the inflator-receiving aperture clamping the inflator flange against the bottom surface of the module baseplate and wherein each retention tab has an upper tab portion extending downwardly from the bottom surface of the module baseplate and radially inwardly towards the inflator-receiving aperture to a lower tab portion extending upwardly from the upper tab portion and also radially inwardly toward the inflator-receiving aperture to a distal end of the retention tab, the distal ends of each of the retention tabs spaced apart from the bottom surface of the module baseplate less than a thickness of the inflator flange.

12. An airbag module as defined in claim 11 wherein the plurality of resiliently bendable retention tabs comprise at least two generally opposed retention tabs, the at least two opposed retention tabs spaced radially outwardly from the inflator-receiving aperture with the distal ends of the retention tabs providing the clamping of the inflator flange against the module baseplate retaining the airbag inflator within the module housing.

13. An airbag module as defined in claim 11 wherein the retention tabs of the module housing are unitary with the module baseplate.

14. An airbag module as defined in claim 11 wherein the module housing further comprises a module sidewall extending upwardly from an outer edge of the module baseplate to an outwardly curled rim defining an open top of the module housing.

15. An airbag module as defined in claim 11 wherein the module baseplate of the module housing is generally rectangular and the inflator-receiving aperture is generally circular.