Safety apparatus

• US 5,114,179 A
• Filed: 12/18/1990
• Issued: 05/19/1992
• Est. Priority Date: 12/18/1990
• Status: Expired due to Term

• Current Assignee: TRW Inc. (Northrop Grumman Corporation)
• Original Assignee: TRW Inc. (Northrop Grumman Corporation)
• Inventors: Emery, Jerome W., O'Loughlin, John P.
• Primary Examiner(s): Marmor, Charles A.
• Assistant Examiner(s): DICKSON, PAUL N
• Application Number:
  US07/629,426
• Time in Patent Office: 518 Days
• Field of Search: 280/743, 280/741, 280/737, 102/530, 102/531, 206/522, 206/583
• US Class Current: 280/741
• CPC Class Codes: B60R 2021/26064 characterised by auto-ignition means
• CPC Class Codes: B60R 21/2644 using only solid reacting substances, e.g. pellets, powder

Abstract

An apparatus for use in inflating a vehicle occupant restraint includes an inflator housing and a canister containing gas generating material. The canister has a resiliently deflectable wall which presses against the inflator housing to hold the canister against movement relative to the inflator housing. A cushion is disposed inside the canister between the wall and the gas generating material. In addition, auto ignition material is disposed in a projecting wall portion of the canister. When the apparatus is assembled, the wall of the canister is resiliently deflected by applying a force against the projecting wall portion of the canister. After the inflator housing has been closed, the canister is retained against movement relative to the inflator housing by the force applied by the resiliently deflected wall of the canister against the inflator housing.

Claims

1. A method of assembling an apparatus for inflating a vehicle occupant restraint, said method comprising the steps of:

positioning a canister containing gas generating material and an inflator housing relative to each other;

resiliently deflecting a wall of the canister by applying a force against the wall of the canister by pressing the wall against a first wall of the inflator housing; and

retaining the canister against movement relative to the inflator housing by transmitting force between the resiliently deflected wall of the canister and a second wall of the inflator housing.

2. A method as set forth in claim 1 wherein the step of resiliently deflecting the wall of the canister includes resiliently deflecting the wall inwardly as the canister and inflator housing are positioned relative to each other.

3. A method as set forth in claim 1 further including the step of at least partially compressing a cushion between an inner side surface of the canister and the gas generating material during said step of resiliently deflecting a wall of the canister.

4. A method as set forth in claim 1 wherein the step of retaining the canister against movement by transmitting force includes applying a resilient restoring force resulting from said deflected wall against the inflator housing.

5. A method as set forth in claim 1 wherein the wall of the canister includes a projecting portion which at least partially defines a recess containing auto ignition material, said step of resiliently deflecting the wall of the canister including engaging the inflator housing with the projecting portion of the wall and resiliently deflecting the wall of the canister adjacent to the projecting portion while maintaining the projecting portion of the wall of the canister in engagement with the inflator housing.

6. A method as set forth in claim 1 wherein said step of resiliently deflecting the wall of the canister is performed while maintaining the wall of the canister spaced from the gas generating material.

7. A method as set forth in claim 1 wherein said step of positioning a canister containing gas generating material and an inflator housing relative to each other includes moving a first wall of the canister into engagement with a wall of the inflator housing while maintaining a seam between the first wall of the canister and a second wall of the canister spaced from the inflator housing wall, said step of resiliently deflecting a wall of the canister includes pressing the first wall of the canister against the inflator housing wall while maintaining the seam spaced from the inflator housing wall.

8. An apparatus for use in inflating a restraint for an occupant of a vehicle, said apparatus comprising:

an inflator housing, said inflator housing including first and second end walls which partially define a chamber; and

a canister containing gas generating material, said canister including a first wall, a second wall and a side wall, said side wall of said canister being fixedly attached to said first and second walls of said canister, said first wall of said canister engaging said first wall of said housing, said first wall of said canister being resiliently deformed and pressing against said first wall of said housing, said second wall of said canister engaging said second wall of said housing, said side wall transmitting force from said resiliently deformed first wall of said canister to maintain said second wall of said canister in engagement with said second wall of said housing.

9. An apparatus as set forth in claim 8, further including a cushion disposed in said canister between said first wall of said canister and the gas generating material, said cushion being at least partially compressed by said first wall of said canister.

10. An apparatus as set forth in claim 8, wherein said first wall of said canister includes a projecting portion which at least partially defines a recess containing auto ignition material, said projecting portion of said first wall of said canister being disposed in engagement with said first wall of said inflator housing, said first wall of said canister being resiliently deflected adjacent to said projecting portion of said first wall of said canister.

11. An apparatus as set forth in claim 8, wherein said first wall of said canister is spaced from the gas generating material in said canister.

12. An apparatus as set forth in claim 8, wherein a central portion of said first wall of said canister is disposed in abutting engagement with said first wall of said inflator housing and a portion of said first wall of said canister outwardly from said central portion is spaced from said first wall of said inflator housing.

13. An apparatus as set forth in claim 8, said canister including a seam, said seam interconnecting said first and side walls of said canister, said second and side walls of said canister being elements of a continuous unitary member.

14. An apparatus as set forth in claim 8, wherein a portion of said side wall of said canister is of reduced thickness to permit said side wall to rupture upon ignition of the gas generating material.

15. An apparatus for use in inflating a restraint for a occupant of a vehicle, said apparatus comprising:

an inflator housing having a chamber;

a canister containing gas generating material located in said chamber, said canister having a resiliently deflected wall pressing against said inflator housing to hold said canister against movement in said chamber relative to said housing; and

a cushion disposed in said canister between said wall of said canister and the gas generating material, said cushion being at least partially compressed by said wall of said canister to provide a force for resisting deflection of said wall of said canister and to hold the gas generating material against movement.

16. An apparatus as set forth in claim 15, wherein said wall of said canister includes a projecting portion which at least partially defines a recess containing auto ignition material, said projecting portion of said wall of said canister being disposed in engagement with said inflator housing, said wall of said canister being resiliently deflected adjacent to said projecting portion of said wall of said canister.

17. An apparatus as set forth in claim 15, wherein said wall of said canister is spaced from the gas generating material in said canister.

18. An apparatus as set forth in claim 15, wherein a central portion of said wall of said canister is disposed in abutting engagement with said inflator housing and a portion of said wall of said canister outwardly from said central portion is spaced from said inflator housing.

19. An apparatus as set forth in claim 15, said canister including a lower section and a seam interconnecting said wall and said lower section of said canister, said wall and said lower section of said canister enclosing the gas generating material, said seam providing a hermetic seal between said wall and said lower section of said canister, said wall providing a force to maintain said lower section of said canister in engagement with said housing.