Air bag inflator assembly

• US 5,141,247 A
• Filed: 12/18/1990
• Issued: 08/25/1992
• Est. Priority Date: 12/18/1990
• Status: Expired due to Fees

• Current Assignee: TRW Inc. (Northrop Grumman Corporation)
• Original Assignee: TRW Inc. (Northrop Grumman Corporation)
• Inventors: Barth, Thomas H.
• Primary Examiner(s): Marmor, Charles A.
• Assistant Examiner(s): FERRITER, KARIN L
• Application Number:
  US07/629,378
• Time in Patent Office: 616 Days
• Field of Search: 280/728, 280/730, 280/731, 280/732, 280/736, 280/740, 280/741, 280/743, 280/750, 141/313, 141/314, 403/195, 403/194, 403/199, 411/502, 411/503, 411/521, 29/513
• 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
• CPC Class Codes: Y10T 29/49922 by bending over projecting prongs

Abstract

A vehicle occupant safety apparatus including an inflatable air bag, an inflator for inflating the air bag, and a support plate for supporting the air bag and the inflator on a vehicle steering wheel. The safety apparatus further includes a retainer ring for clamping together the air bag, the inflator, and the support plate. The retainer ring has tabs which are bendable into positions for exerting clamping forces on the air bag, the inflator, and the support plate.

Claims

1. A vehicle occupant safety apparatus comprising:

an inflatable vehicle occupant restraint;

an inflator for inflating said restraint;

a support plate; and

means for clamping said restraint, said inflator, and said support plate together, said clamping means comprising a retainer member, said retainer member having an axis, a ring-shaped portion centered on said axis, and clamping elements projecting from said ring-shaped portion, said clamping elements being tabs arranged in an array extending circumferentially about said axis, said tabs being bent into clamping positions and including tabs bent radially inward of said ring-shaped portions and tabs bent radially outward of said ring-shaped portion.

2. A vehicle occupant safety apparatus as defined in claim 1, wherein said tabs include tabs of differing lengths.

3. A vehicle occupant safety apparatus as defined in claim 2, wherein said tabs include a first group of tabs bent radially inward of said ring-shaped portion, a second group of tabs bent radially inward of said ring-shaped portion and being longer than said tabs of said first group, and a third group of tabs bent radially outward of said ring-shaped portion and being longer than said tabs of said first group.

4. A vehicle occupant safety apparatus as defined in claim 1, wherein said retainer member having said clamping elements is a single piece of metal.

5. A vehicle occupant safety apparatus comprising:

an inflatable vehicle occupant restraint;

an inflator for inflating said restraint,

a support plate; and

means for clamping said restraint, said inflator, and said support plate together, said clamping means comprising a retainer member, said retainer member having a ring-shaped portion defining an opening, first clamping portions for applying clamping forces to said restraint and said support plate at locations radially outward of said opening, and second clamping portions for applying clamping forces to said inflator at locations radially inward of said opening.

6. A vehicle occupant safety apparatus as defined in claim 5 wherein said retainer member is a single piece of metal, said clamping means consisting of said retainer member.

7. A vehicle occupant safety apparatus comprising:

an inflatable vehicle occupant restraint having a first axis and an opening centered on said first axis;

an inflator for inflating said restraint, said inflator having a second axis;

a support plate having a third axis and an opening centered on said third axis; and

a retainer member having means for applying clamping forces on opposite axial sides of said restraint, said inflator, and said support plate to clamp said restraint, said inflator, and said support plate to said retainer member, said retainer member supporting said inflator in a position radially inward of said openings;

said retainer member having a fourth axis and a ring-shaped portion that is centered on said fourth axis, said retainer member, said restraint, said inflator, and said support plate being coaxial; and

said means for applying clamping forces including an annular flange extending radially from said ring-shaped portion of said retainer member and a plurality of tabs extending from said ring-shaped portion, at least some of said tabs being bent into positions extending radially over said flange.

8. A vehicle occupant safety apparatus comprising:

an inflatable vehicle occupant restraint,

an inflator for inflating said restraint, said inflator having an inflator housing with an axis and a flange extending circumferentially about said axis, said flange having an outer edge;

a support plate; and

a retainer member extending circumferentially around said inflator housing, said retainer member having first means connecting said support plate and said inflatable restraint to the inflator and second means clamping said inflator to said retainer member, said second means including clamping portions of said retainer member located on opposite axial sides of said flange on said inflator, said clamping portions of said retainer member clamping said flange between said clamping portions of said retainer member, said retainer member further extending around said outer edge of said flange between said clamping portions and joining said clamping portions to each other.

9. An apparatus as defined in claim 8 wherein said clamping portions of said retainer member include bendable tabs extending from said base portion.