Driver side air bag module with annular air bag

• US 6,550,804 B2
• Filed: 05/31/2001
• Issued: 04/22/2003
• Est. Priority Date: 02/23/2001
• Status: Expired due to Term

• 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: Burdock, John M.
• Primary Examiner(s): Dickson, Paul N.
• Assistant Examiner(s): Ilan, Ruth
• Application Number:
  US09/870,906
• Publication Number:
  US 20020117838A1
• Time in Patent Office: 691 Days
• Field of Search: 280/743.1, 280/728.3, 280/743.2, 280/729, 280/731
• US Class Current: 280/731
• CPC Class Codes: B60R 2021/23576 Sewing
• CPC Class Codes: B60R 21/2035 using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit steering wheel covers with tear lines B60R21/21656; assembling of modules B60R21/217
• CPC Class Codes: B60R 21/216 comprising tether means for limitation of cover motion during deployment
• CPC Class Codes: B60R 21/21658 with integrated switches, e.g. horn switches
• CPC Class Codes: B60R 21/231 characterised by their shape, construction or spatial configuration
• CPC Class Codes: B60R 25/00 Fittings or systems for preventing or indicating unauthorised use or theft of vehicles locks for vehicles E05B77/00-E05B85/00

Abstract

An air bag module including an air bag, the air bag including: a face panel having a first central opening therein; a rear panel having a second central opening therein, that portion of the rear panel about the second central opening forming a neck portion; a tubular insert having an open end secured to the face panel about the first central opening, the tubular insert including a closed end opposite the open end, the tubular insert extending into the air bag, sides of the tubular insert including at least one opening; the tubular insert including an inflatable portion having an open end secured about the at least one opening and upon inflation the inflatable portion is moved into the center of the tubular insert.

Claims

1. An air bag module comprising an air bag, the air bag including:

a face panel having a central, first opening;

a rear panel having a second opening;

an inflatable, cylindrical tube or tether member secured to the face panel, about the first opening, wherein the cylindrical tube is closed at one end by an end panel, the cylindrical member at an opposite second end secured to the face panel about the first opening, wherein the first opening is not obscured;

at least one inflatable lobe secured about an opening in a wall of the cylindrical member, the lobe on inflation of the air bag inflates inwardly toward the center of the face panel.

2. The air bag module as defined in claim 1 including a cover to protect the air bag, wherein the cover is annular in shape and includes a plurality of tear seams on a top of the cover, the tear seams radially located about the control module and extending toward an outer diameter of the cover.

3. The air bag module as defined in claim 1 further includes a control module having at least one of an informational device and an activation button, the control module positioned centrally in the air bag module;

and a cover to protect the air bag,

wherein the cover is circular in shape and includes a plurality of tear seams on a top of the cover, the tear seams radially located about the control module and extending toward an outer diameter of the cover, the cover additionally includes an additional circumferential tear seam located generally along a periphery of the control module.

4. The air bag module as defined in claim 3 wherein the cover includes a plurality of tear seams on a top of the cover, the tear seams radially located about the control module and extending toward an outer diameter of the cover, the cover additionally includes an additional circumferential tear seam located generally along a periphery of the control module;

further including a fascia plate located on the top of the cover, within an area defined by the circumferential tear seam.

5. The air bag module as defined in claim 1 wherein the face panel is circular.

6. The air bag module as defined in claim 1 wherein the first opening is circular.

7. An air bag module comprising:

a control module having at least one of an informational device and an activation button, the control module positioned centrally in the air bag module;

an air bag that is initially folded peripherally relative to the control module and when inflated expands to an annular configuration about the control module, the center of the annular configuration generally coaxial with an axis extending out of a top of the control module, the air bag including at least one inflatable part which expands into the center of the annular configuration providing an inflatable barrier relative to the top of the control module;

a cover located above the peripherally folded air bag including a plurality of tear seams opened by the inflating air bag; and

wherein the air bag includes at least one inflatable lobe which when inflated is repositioned from within the air bag to a position in which the inflatable lobe is covering the control module.

8. An air bag module comprising an air bag, the air bag including:

a face panel having a first central opening therein;

a rear panel having a second central opening therein, a portion of the rear panel about the second central opening forming a neck portion;

a tubular insert having an open end secured to the face panel about the first central opening, the tubular insert including a closed end opposite the open end, the tubular insert extending into the air bag, and wherein sides of the tubular insert include at least one opening;

the tubular insert including an inflatable portion having an open end secured about the at least one opening and upon inflation the inflatable portion is moved into the center of the tubular insert.

9. The module as defined in claim 8 including a center module located within the tubular insert and positioned adjacent the closed end.

10. The module as defined in claim 9 including an inflator for providing inflation gas to inflate the air bag, the inflator positioned below the center module within the air bag proximate the neck portion.

11. The module as defined in claim 10 including a housing below the inflator, the housing including a side wall spaced relative to sides of the center module defining an annular space therebetween and wherein the air bag is placed into this annular space and inflates from this annular space.

12. The module as defined in claim 11 including a cover having a plurality of tear seams on a top of the cover, the tear seams radially located and extending to the outer diameter of the cover.

13. The air bag module as defined in claim 12 wherein the cover includes an additional circumferential tear seam located generally proximate the periphery of the center module.

14. The air bag module as defined in claim 13 further including a fascia plate located on the top of the cover, within an area defined by the circumferential tear seam.

15. The air bag module as defined in claim 14 wherein the circumferential tear seam is circular.