Inflator having gas deflector flanges

• US 6,149,192 A
• Filed: 08/11/1998
• Issued: 11/21/2000
• Est. Priority Date: 08/11/1998
• Status: Expired due to Fees

• Current Assignee: TRW Inc. (Northrop Grumman Corporation)
• Original Assignee: TRW Inc. (Northrop Grumman Corporation), TRW Vehicle Safety Systems Incorporated (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Swann, Timothy A., Bowers, Paul A.
• Primary Examiner(s): Mai, Lanna
• Assistant Examiner(s): JASMIN, LYNDA C
• Application Number:
  US09/132,341
• Time in Patent Office: 833 Days
• Field of Search: 280/736, 280/741, 280/742, 280/740
• US Class Current: 280/740
• 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
• CPC Class Codes: B60R 21/26 characterised by the inflation fluid source or means to control inflation fluid flow arrangement or mounting thereof to the vehicle B60R21/20; blasting cartridges for producing gas under pressure in general F42B3/04; initiators or igniters therefor F42B3/10
• CPC Class Codes: B60R 21/261 with means other than bag structure to diffuse or guide inflation fluid

Abstract

An apparatus (10) comprises an inflatable vehicle occupant protection device (12) and an actuatable inflator (14) for, when actuated, providing inflation fluid to inflate the inflatable vehicle occupant protection device. The inflator (14) includes a circumferentially spaced plurality of radially extending outlet openings (26) and a circumferentially spaced plurality of deflector flanges (30). The deflector flanges (30) are spaced radially from the outlet openings (26) and are radially aligned with the outlet openings. The deflector flanges (30) completely overlie the outlet openings (26). When the inflator (14) is actuated, the deflector flanges (30) deflect the inflation fluid flowing from the outlet openings (26) and thereby prevent the inflation fluid from impinging directly the inflatable vehicle occupant protection device (12) as the inflation fluid is being directed out of the inflator (14).

Claims

1. An apparatus for use in a vehicle, said apparatus comprising:

an inflatable vehicle occupant protection device having inner and outer surfaces; and

an actuatable inflator for, when actuated, providing inflation fluid to inflate said inflatable vehicle occupant protection device,

said inflator including a circumferentially spaced plurality of radially extending outlet openings which are located inside said inflatable vehicle occupant protection device and through which inflation fluid from said inflator is directed radially outward to inflate said inflatable vehicle occupant protection device,

said inflator further including a circumferentially spaced plurality of deflector flanges, said plurality of deflector flanges being permanently spaced radially from said plurality of outlet openings and being radially aligned with said outlet openings, said plurality of deflector flanges completely overlying said plurality of outlet openings such that, when said inflator is actuated, said deflector flanges deflect the inflation fluid flowing from said plurality of outlet openings and thereby prevent the inflation fluid from impinging directly on said inner surface of said inflatable vehicle occupant protection device as the inflation fluid is being directed out of said inflator;

said inflator including a housing, said plurality of outlet openings being formed in said housing, said plurality of deflector flanges being formed in one piece with said housing.

2. The apparatus of claim 1 wherein each of said plurality of deflector flanges radially aligns with and completely overlaps a respective one of said plurality of outlet openings.

3. The apparatus of claim 1 wherein said inflator includes a housing having a cylindrical outer surface, said plurality of deflector flanges extending parallel to said cylindrical outer surface.

4. The apparatus of claim 1 wherein said inflator includes a housing having a cylindrical outer surface, said plurality of deflector flanges extending at an angle relative to said cylindrical outer surface.

5. The apparatus of claim 1 wherein said plurality of outlet openings and said plurality of deflector flanges are equally spaced about the circumference of said inflator.

6. The apparatus of claim 1 wherein said plurality of outlet openings and said plurality of deflector flanges are unequally spaced about the circumference of said inflator.

7. The apparatus of claim 1 wherein each of said plurality of outlet openings is identical in size.

8. The apparatus of claim 1 wherein said plurality of outlet openings includes diffuser openings of different sizes.

9. An apparatus for use in a vehicle, said apparatus comprising:

an inflatable vehicle occupant protection device having inner and outer surfaces; and

an actuatable inflator for, when actuated, providing inflation fluid to inflate said inflatable vehicle occupant protection device,

said inflator including a circumferentially spaced plurality of radially extending outlet openings which are located inside said inflatable vehicle occupant protection device and through which inflation fluid from said inflator is directed radially outward to inflate said inflatable vehicle occupant protection device,

said inflator further including a circumferentially spaced plurality of deflector flanges, said plurality of deflector flanges being spaced radially from said plurality of outlet openings and being radially aligned with said outlet openings, said plurality of deflector flanges completely overlying said plurality of outlet openings such that, when said inflator is actuated, said deflector flanges deflect the inflation fluid flowing from said plurality of outlet openings and thereby prevent the inflation fluid from impinging directly on said inner surface of said inflatable vehicle occupant protection device as the inflation fluid is being directed out of said inflator;

at least one of said plurality of deflector flanges comprising a base panel and first and second side panels.

10. The apparatus of claim 9 wherein said first and second side panels extend perpendicular to said base panel toward a respective one of said plurality of outlet openings.

11. The apparatus of claim 9 wherein at least one of said first and second side panels extends at an angle from said base panel toward a respective one of said plurality of outlet openings.

12. The apparatus of claim 9 wherein said first and second side panels extend at converging angles from said base panel toward a respective one of said plurality of outlet openings.

13. The apparatus of claim 9 wherein said inflator includes a housing, said plurality of outlet openings being formed in said housing, said plurality of deflector flanges being welded to said housing.