Steering wheel assembly featuring the elimination of a contact coil

• US 6,517,105 B1
• Filed: 04/12/2002
• Issued: 02/11/2003
• Est. Priority Date: 04/12/2002
• Status: Expired due to Fees

• Current Assignee: Key Safety Systems, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Breed Automotive Technology, Inc. (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Ford, Brian
• Primary Examiner(s): Dickson, Paul N.
• Assistant Examiner(s): Ilan, Ruth
• Application Number:
  US10/120,506
• Time in Patent Office: 305 Days
• Field of Search: 745/52, 280/731, 280/740, 280/742, 280/736, 280/730.1
• US Class Current: 280/731
• CPC Class Codes: B60R 21/203 in steering wheels or steering columns
• CPC Class Codes: Y10T 74/20834 Hand wheels

Abstract

A steering wheel assembly including an inflator subassembly, a steering wheel armature, and a cushion subassembly. The inflator subassembly and the cushion subassembly are located on opposite sides of the steering wheel armature. The inflator subassembly comprises an inflator. The inflator subassembly has a lip, which fits into a circular channel on the bottom portion of the steering wheel armature. The cushion subassembly includes an airbag, a retainer, and an airbag cover. Upon detection of a crash from a crash sensor, the inflator begins to generate gas. The gas flows through the inflator subassembly and then is forced to flow through the hub portion of the steering wheel and into the cushion.

Claims

1. A steering wheel assembly comprising:

a flange (17) adapted to receive a steering shaft (15);

a gas deflector (19) attached to the flange (17) for directing a flow of inflation gas in a desired direction, wherein an upper edge around the gas deflector (19) and the flange form a flexible lip (38);

an inflator (18) for providing inflation gas, the inflator (18) being off-set mounted relative to the steering shaft (15);

an armature (20) comprising a hub portion (34) having a channel that receives the flexible lip (38), wherein the flexible lip flexes toward an outer wall of the channel of the hub portion (34) to reduce gas leakage during airbag deployment.

2. A steering wheel assembly according to claim 1, wherein the inflator (18) does not cover any portion of an aperture (30) of the flange (17).

3. A steering wheel assembly according to claim 1, wherein the gas deflector (19) is secured to a pan (28) of the flange (17) and the inflator is disposed between the pan (28) and the gas deflector (19).

4. A steering wheel assembly according to claim 1 further comprising a slip ring (16) installed on a side of a pan (28).

5. A steering wheel assembly according to claim 1 wherein the armature and the inflator (18) are rotationally decoupled.

6. A steering wheel assembly according to claim 1 further comprising a fastener (22) for fastening the armature (20) to the steering shaft (15), wherein the steering shaft (15)passes through an aperture (20) of the flange (17).

7. A steering wheel assembly according to claim 1 further comprising a retainer ring (23) for securing an airbag (24) to the armature (20), the airbag (24) and the retainer ring (23) are disposed on one side of the armature (20) while the inflator (18) is disposed on another side of the armature (20).

8. A steering wheel assembly according to claim 1 further comprising a bracket (60) for connecting the flange (17) to a steering column, the bracket (60) comprises a plurality of integrated rivets (62).

9. A steering wheel assembly comprising:

an inflator subassembly (26) having an inflator (18), a flange (17) with a pan (28) for holding the inflator (18), and an aperture (30) therethrough that receives a steering shaft (15);

an armature (20) comprising a hub portion (34) that receives a flexible lip of the inflator subassembly (26);

a cushion subassembly (27) comprising a retainer ring (23) for securing an airbag (24) to the armature (20) and an airbag cover (25) for covering the airbag (24), wherein the cushion subassembly (27) and inflator subassembly (26) are arranged on opposite sides of the armature;

wherein the flexible lip (38) of the inflator subassembly fits into a channel in the hub portion (34), the flexible lip (38) flexes toward an outer wall of the channel in the hub portion (34) to reduce gas leakage during airbag deployment.

10. A steering wheel assembly according to claim 9, wherein the inflator (18) is off-set mounted relative to the steering shaft (15).

11. A steering wheel assembly according to claim 9, wherein the inflator subassembly (26) further comprises an gas deflector (19) for deflecting the flow of inflation gas, the gas deflector (19) is secured to the pan (28) and the inflator (18) is disposed between the pan (28) and the gas deflector (19).

12. A steering wheel assembly according to claim 9 further comprising a slip ring (16) installed on a side of the pan (28).

13. A steering wheel assembly according to claim 9 wherein the armature (20) and the inflator subassembly (26) are rotationally decoupled.

14. A steering wheel assembly according to claim 9 further comprising a fastener (22) for fastening the armature (20) to the steering shaft (15), which passes through the aperture (30) of the flange (17).