Air bag deflection shield

• US 5,385,366 A
• Filed: 09/07/1993
• Issued: 01/31/1995
• Est. Priority Date: 09/07/1993
• Status: Expired due to Fees

• Current Assignee: General Motors Corporation (General Motors Company)
• Original Assignee: General Motors Corporation (General Motors Company)
• Inventors: Herr, Benjamin M. IV, Frank, Frederick W.
• Primary Examiner(s): Camby, Richard M.
• Assistant Examiner(s): Dickson, Paul N.
• Application Number:
  US08/116,200
• Time in Patent Office: 511 Days
• Field of Search: 280/728 B, 280/732, 280/728 R
• US Class Current: 280/728.3
• CPC Class Codes: B60R 2021/161 characterised by additional means for controlling deployment trajectory
• CPC Class Codes: B60R 21/16 Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags protective garments with automatically inflatable shock-absorbing means A41D13/018; connection of valves to inflatable elastic bodies B60C29/00
• CPC Class Codes: B60R 21/216 comprising tether means for limitation of cover motion during deployment

Abstract

According to the invention, a vehicle has an air bag module mounted beneath an opening in a vehicle panel. The module includes an inflatable air bag for deployment through the opening. A cover door closes the opening and is hingedly connected to the vehicle panel for movement away from the opening. An air bag deflection shield is underlying and separate from the cover door and overlying the air bag and module. The deflection shield has a forward edge hingedly connected to the module to enable the inflating air bag to pivot the deflection shield away from the module so that the deflection shield engages and moves the cover door away from the opening. A flexible strap limits the pivotal movement of the deflection shield to a predetermined position such that upon air bag deployment, the deflection shield directs the inflating air bag rearwardly and downwardly towards a vehicle occupant and shields the cover door from contact by the inflating air bag.

Claims

1. In a vehicle having an air bag module mounted beneath an opening in a vehicle panel, the module including an inflatable air bag for deployment through the opening, and a cover door closing the opening and hingedly connected to the vehicle panel for pivotal movement away from the opening, the improvement comprising:

an air bag deflection shield underlying and separate from the cover door and overlying the air bag and module, the deflection shield having a forward edge hingedly connected to the module to enable the inflating air bag to pivot the deflection shield away from the module so that the deflection shield engages and moves the cover door away from the opening, the deflection shield having a rearward edge being upwardly rolled to form a U-shaped cross-section for creating a strong, smooth rearward edge on the deflection shield for directing the inflating air bag,

and means for limiting the pivotal movement of the deflection shield to a predetermined position forming a rearwardly opening angle to direct deployment of the inflating air bag,

whereby upon air bag deployment the deflection shield directs the inflating air bag rearwardly and downwardly towards a vehicle occupant and shields the cover door from contact by the inflating air bag.

2. In a vehicle having an air bag module mounted beneath an opening in a vehicle panel, the module including an inflatable air bag for deployment through the opening, and a cover door closing the opening and hingedly connected to the vehicle panel for pivotal movement away from the opening, the improvement comprising:

an air bag deflection shield underlying and separate from the cover door and overlying the air bag and module, the deflection shield having a forward edge and a rearward edge,

hinging means operatively associated with the forward edge of the deflection shield to enable pivotal movement of the deflection shield by the inflating air bag away from the module so that the deflection shield engages and moves the cover door away from the opening,

and a flexible strap having a predetermined length for limiting the pivotal movement of the deflection shield to a predetermined position forming a rearwardly opening angle to direct deployment of the inflating air bag, the strap having first and second ends each attached to opposite side edges of the module, and the strap having a central portion overlying the deflection shield and fixedly attached to the deflection shield by a plurality of fasteners,

whereby upon air bag deployment the deflection shield directs the inflating air bag rearwardly and downwardly towards a vehicle occupant and shields the cover door from contact by the inflating air bag.

3. The improvement of claim 2 further characterized by the hinging means including a convoluted metal strap adapted for anchoring the deflection shield to the module, the metal strap being integral with the deflection shield and transversely extending along the forward edge of the deflection shield.

4. The improvement of claim 2 further characterized by the rearward edge being upwardly rolled to form a U-shaped cross-section for creating a strong, smooth rearward edge on the deflection shield for directing the inflating air bag.

5. The improvement of claim 2 further characterized by the deflection shield having first and second slots each on opposite side edges of the deflection shield to locate the central portion of the strap on the deflection shield.

6. The improvement of claim 2 further characterized by having first and second brackets carried by opposite side edges of the module each for receiving an end of the flexible strap therethrough to enable attachment of the strap to the module.

7. In a vehicle having an air bag module mounted beneath an opening in a vehicle panel, the module including an inflatable air bag for deployment through the opening, and a cover door closing the opening and hingedly connected to the vehicle panel for pivotal movement away from the opening, the improvement comprising:

an air bag deflection shield underlying and separate from the cover door and overlying the air bag and module, the deflection shield having a forward edge hingedly connected to the module to enable the inflating air bag to pivot the deflection shield away from the module so that the deflection shield engages and moves the cover door away from the opening,

a flexible strap having first and second ends each attached to opposite side edges of the module and a central portion overlying the deflection shield, the strap having a predetermined length to define limited pivotal movement of the deflection shield to a predetermined position forming a rearwardly opening angle to direct deployment of the inflating air bag,

and the deflection shield having first and second slots each on opposite side edges of the deflection shield to locate the central portion of the strap on the deflection shield,

whereby upon air bag deployment the deflection shield directs the inflating air bag rearwardly and downwardly towards a vehicle occupant and shields the cover door from contact by the inflating air bag.

8. The improvement of claim 7 further characterized by the deflection shield having a rearward edge upwardly rolled to form a U-shaped cross-section for creating a strong, smooth rearward edge on the deflection shield for directing the inflating air bag.

9. The improvement of claim 7 further characterized by the central portion of the strap being fixedly attached to the deflection shield by a plurality of fasteners.

10. The improvement of claim 7 further characterized by having first and second brackets carried by opposite side edges of the module each for receiving an end of the flexible strap therethrough to enable attachment of the strap to the module.

11. In a vehicle having an air bag module mounted beneath an opening in a vehicle panel, the module including an inflatable air bag for deployment through the opening, and a cover door closing the opening and hingedly connected to the vehicle panel for pivotal movement away from the opening, the improvement comprising:

an air bag deflection shield underlying and separate from the cover door and overlying the air bag and module, the deflection shield having a transversely extending forward edge comprising an integral convoluted metal strap for hingedly connecting the deflection shield to the module to enable pivotal movement of the deflection shield by the inflating air bag away from the module about the forward edge so that the deflection shield engages and moves the cover door away from the opening,

and a flexible strap having a predetermined length for limiting the pivotal movement of the deflection shield to a predetermined position forming a rearwardly opening angle to direct deployment of the inflating air bag, the strap having first and second ends each attached to opposite side edges of the module, and the strap having a central portion overlying the deflection shield to limit the pivotal movement of the deflection shield to the predetermined position,

whereby upon air bag deployment the deflection shield directs the inflating air bag rearwardly and downwardly towards a vehicle occupant and shields the cover door from contact by the inflating air bag.

12. The improvement of claim 11 further characterized by the deflection shield having side edges spaced apart from the module.