Wrapped inflatable restraint

• US 5,613,698 A
• Filed: 05/25/1995
• Issued: 03/25/1997
• Est. Priority Date: 05/25/1995
• Status: Expired due to Fees

• Current Assignee: TRW Vehicle Safety Systems Incorporated (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: TRW Vehicle Safety Systems Incorporated (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Essad, James W., Patercsak, Patrick E.
• Primary Examiner(s): Johnson, Brian L.
• Assistant Examiner(s): English, Peter C.
• Application Number:
  US08/448,921
• Time in Patent Office: 670 Days
• Field of Search: 280/728.2, 280/729, 280/730.1, 280/743.1, 280/743.2, 280/728.3, 280/728.1, 280/732, 280/731
• US Class Current: 280/728.1
• CPC Class Codes: B60R 2021/161 characterised by additional means for controlling deployment trajectory
• CPC Class Codes: B60R 21/201 Packaging straps or envelopes for inflatable members
• CPC Class Codes: B60R 21/2171 specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters B60R21/2176 takes precedence
• CPC Class Codes: B60R 21/237 characterised by the way they are folded

Abstract

An air bag (12) for restraining an occupant (14) of a vehicle (16) has a deflated condition and an inflated condition. The air bag (12) has layers (20, 22) defining between them an inflation fluid volume (18) into which inflation fluid is directed to inflate the air bag. A fluid impermeable wrap (140) encircles the air bag (12) when the air bag is in the deflated condition. The wrap (140) has fluid inlet openings (190, 192) for receiving inflation fluid and for directing inflation fluid into a predetermined portion (120) of the folded air bag (12) to cause the predetermined portion to inflate first.

Claims

1. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated folded condition and an inflated condition for protecting an occupant of a vehicle; and

a flexible wrap encircling said folded inflatable restraint and maintaining said folded inflatable restraint in said folded condition, said flexible wrap having portions which are secured together to maintain said wrap in an encircling relation with said folded inflatable restraint when said inflatable restraint is in the deflated folded condition;

said flexible wrap having an opening means for receiving inflation fluid and for directing inflation fluid into a predetermined portion of said deflated inflatable restraint to cause said predetermined portion to inflate first.

2. An apparatus as set forth in claim 1 wherein said flexible wrap comprises a sheet material member made from a fluid impermeable material, said opening means comprising a fluid inlet opening formed in said fluid impermeable material for selectively directing inflation fluid through said fluid impermeable material into said predetermined portion of said inflatable restraint.

3. An apparatus as set forth in claim 1 wherein said inflatable restraint when in the inflated condition has upper and lower sections;

said inflatable restraint when in the deflated condition having a first portion which is turned inside out and received inside a second portion of said inflatable restraint, said first portion of said inflatable restraint forming said lower section of said inflatable restraint when said inflatable restraint is in the inflated condition, said first portion of said inflatable restraint being the final portion of said inflatable restraint to inflate when said inflatable restraint is inflated;

said inflatable restraint comprising a plurality of layers including a back panel disposed farthest from the vehicle occupant when said inflatable restraint is inflated and a front panel disposed closest to the vehicle occupant when said inflatable restraint is inflated;

each of said back panel and said front panel having respective upper and lower portions, said upper portions of said back panel and of said front panel forming said upper section of said inflatable restraint when said inflatable restraint is inflated, said lower portions of said back panel and of said front panel forming said lower section of said inflatable restraint when said inflatable restraint is inflated;

said first portion of said inflatable restraint including said lower portions of said back panel and of said front panel;

said inflatable restraint having an inflation fluid opening though which inflation fluid is directed to inflate said inflatable restraint, said inflatable restraint having a first condition in which first and second parts of said inflatable restraint are disposed on opposite sides of said inflation fluid opening;

said inflatable restraint having a second condition in which said first part of said inflatable restraint is rolled into a first compact shape and said second part of said inflatable restraint is disposed adjacent to said rolled first part of said inflatable restraint for mounting in the vehicle.

4. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated folded condition and an inflated condition for protecting an occupant of a vehicle, said inflatable restraint having at least one fabric panel defining an inflation fluid volume for receiving inflation fluid to inflate said inflatable restraint; and

a fluid impermeable flexible member wrapped around said folded inflatable restraint and maintaining said folded inflatable restraint in said folded condition, said flexible wrap having portions which are secured together to maintain said wrap in an encircling relation with said folded inflatable restraint when said inflatable restraint is in the deflated folded condition;

said flexible member having an opening means for directing inflation fluid to flow in a predetermined flow path into said inflation fluid volume of said inflatable restraint to inflate said inflatable restraint.

5. An apparatus as set forth in claim 4 wherein said opening means is disposed on a first side of said safety apparatus when said inflatable restraint is in the deflated condition, said flexible member having a tear seam which is disposed on a second side of said safety apparatus opposite from said first side when said inflatable restraint is in the deflated condition.

6. An apparatus as set forth in claim 4 wherein said inflatable restraint when in the inflated condition has upper and lower sections;

said inflatable restraint when in the deflated condition having a first portion which is turned inside out and received inside a second portion of said inflatable restraint, said first portion of said inflatable restraint forming said lower section of said inflatable restraint when said inflatable restraint is in the inflated condition, said first portion of said inflatable restraint being the final portion of said inflatable restraint to inflate when said inflatable restraint is inflated;

said at least one fabric panel of said inflatable restraint comprising a plurality of layers including a back panel disposed farthest from the vehicle occupant when said inflatable restraint is inflated and a front panel disposed closest to the vehicle occupant when said inflatable restraint is inflated;

each of said back panel and said front panel having respective upper and lower portions, said upper portions of said back panel and of said front panel forming said upper section of said inflatable restraint when said inflatable restraint is inflated, said lower portions of said back panel and of said front panel forming said lower section of said inflatable restraint when said inflatable restraint is inflated;

said first portion of said inflatable restraint including said lower portions of said back panel and of said front panel;

said inflatable restraint having an inflation fluid opening though which inflation fluid is directed to inflate said inflatable restraint, said inflatable restraint having a first condition in which first and second parts of said inflatable restraint are disposed on opposite sides of said inflation fluid opening;

said inflatable restraint having a second condition in which said first part of said inflatable restraint is rolled into a first compact shape and said second part of said inflatable restraint is disposed adjacent to said rolled first part of said inflatable restraint for mounting in the vehicle.

7. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated condition and having an inflated condition for protecting an occupant of a vehicle;

a fluid impermeable flexible wrap encircling said inflatable restraint when said inflatable restraint is in the deflated condition; and

an inflator for supplying inflation fluid to said inflatable restraint to inflate said inflatable restraint;

said inflatable restraint having a first part and a second part which are presented toward said inflator when said inflatable restraint is in the deflated condition;

said wrap including a plurality of layers which extend between said first part of said inflatable restraint and said inflator;

said wrap including a single layer which extends between said second part of said inflatable restraint and said inflator;

said single layer of said wrap including at least one fluid inlet opening disposed between said inflator and said second part of said inflatable restraint for receiving inflation fluid from said inflator and for directing inflation fluid through said single layer into said second part of said inflatable restraint to cause said second part of said inflatable restraint to inflate first.

8. An apparatus as set forth in claim 7 wherein a first end portion of said wrap is rolled up with said first part of said inflatable restraint and a second end portion of said wrap is disposed outside of said inflatable restraint in a position encircling said inflatable restraint when said inflatable restraint is in the deflated condition.

9. An apparatus as set forth in claim 7 wherein said inflatable restraint has at least one fabric material panel which defines an inflation fluid volume for receiving inflation fluid to inflate said inflatable restraint, said at least one fluid inlet opening directing inflation fluid to flow in a predetermined flow path into said inflation fluid volume of said inflatable restraint to inflate said inflatable restraint.

10. An apparatus as set forth in claim 9 wherein said wrap has a first end portion which is disposed in said inflation fluid volume adjacent to said at least one fabric material panel when said inflatable restraint is in the deflated condition.

11. An apparatus as set forth in claim 10 wherein said at least one fabric material panel includes a front panel and a back panel of said inflatable restraint, said first end portion of said flexible wrap extending in said inflation fluid volume between said front panel and said back panel, said flexible wrap having a second end portion which encircles said inflatable restraint when said inflatable restraint is in the deflated condition.

12. An apparatus as set forth in claim 7 wherein said inflatable restraint when in the inflated condition has upper and lower sections;

said inflatable restraint when in the deflated condition having a first portion which is turned inside out and received inside a second portion of said inflatable restraint, said first portion of said inflatable restraint forming said lower section of said inflatable restraint when said inflatable restraint is in the inflated condition, said first portion of said inflatable restraint being the final portion of said inflatable restraint to inflate when said inflatable restraint is inflated;

said inflatable restraint comprising a plurality of layers including a back panel disposed farthest from the vehicle occupant when said inflatable restraint is inflated and a front panel disposed closest to the vehicle occupant when said inflatable restraint is inflated;

each of said back panel and said front panel having respective upper and lower portions, said upper portions of said back panel and of said front panel forming said upper section of said inflatable restraint when said inflatable restraint is inflated, said lower portions of said back panel and of said front panel forming said lower section of said inflatable restraint when said inflatable restraint is inflated;

said first portion of said inflatable restraint including said lower portions of said back panel and of said front panel;

said inflatable restraint having an inflation fluid opening though which inflation fluid is directed to inflate said inflatable restraint, said inflatable restraint having a first condition in which said first and second parts of said inflatable restraint are disposed on opposite sides of said inflation fluid opening;

said inflatable restraint having a second condition in which said first part of said inflatable restraint is rolled into a first compact shape and said second part of said inflatable restraint is disposed adjacent to said rolled first part of said inflatable restraint for mounting in the vehicle.

13. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated condition and an inflated condition for protecting an occupant of a vehicle; and

a flexible wrap encircling said inflatable restraint when said inflatable restraint is in the deflated condition;

said flexible wrap having an opening for receiving inflation fluid and for directing inflation fluid into a predetermined portion of said deflated inflatable restraint to cause said predetermined portion to inflate first;

a first end portion of said wrap being folded with a first part of said inflatable restraint and a second end portion of said wrap being disposed outside of said inflatable restraint in a position encircling said inflatable restraint when said inflatable restraint is in the deflated condition.

14. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated condition and an inflated condition for protecting an occupant of a vehicle; and

a flexible wrap encircling said inflatable restraint when said inflatable restraint is in the deflated condition;

said flexible wrap having an opening for receiving inflation fluid and for directing inflation fluid into a predetermined portion of said deflated inflatable restraint to cause said predetermined portion to inflate first;

said wrap including a first layer which extends between an inflator and a first part of said inflatable restraint when said inflatable restraint is in the deflated condition and which does not extend between said inflator and a second part of said inflatable restraint;

said wrap including a second layer having a first section which extends between said inflator and said first part of said inflatable restraint when said inflatable restraint is in the deflated condition and having a second section which extends between said inflator and said second part of said inflatable restraint.

15. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated condition and an inflated condition for protecting an occupant of a vehicle; and

a flexible wrap encircling said inflatable restraint when said inflatable restraint is in the deflated condition;

said flexible wrap having an opening for receiving inflation fluid and for directing inflation fluid into a predetermined portion of said deflated inflatable restraint to cause said predetermined portion to inflate first;

a first part of said inflatable restraint presented toward an inflator being covered with said wrap at a location inside of said opening when said inflatable restraint is in the deflated condition and a second part of said inflatable restraint presented toward said inflator being exposed to said inflator through said opening.

16. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated condition and an inflated condition for protecting an occupant of a vehicle; and

a flexible wrap encircling said inflatable restraint when said inflatable restraint is in the deflated condition;

said flexible wrap having an opening for receiving inflation fluid and for directing inflation fluid into a predetermined portion of said deflated inflatable restraint to cause said predetermined portion to inflate first;

said flexible wrap comprising a sheet material member made from a fluid impermeable material, said opening comprising a fluid inlet opening formed in said fluid impermeable material for selectively directing inflation fluid through said fluid impermeable material into said predetermined portion of said inflatable restraint;

said wrap including a plurality of layers which cover said inflatable restraint when said inflatable restraint is in the deflated condition, said plurality of layers including a single layer which overlies said predetermined portion of said inflatable restraint which inflates first, said single layer including said fluid inlet opening.

17. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated condition and an inflated condition for protecting an occupant of a vehicle, said inflatable restraint having at least one fabric panel defining an inflation fluid volume for receiving inflation fluid to inflate said inflatable restraint; and

a fluid impermeable flexible member wrapped around said inflatable restraint when said inflatable restraint is in the deflated condition;

said flexible member having an opening for directing inflation fluid to flow in a predetermined flow path into said inflation fluid volume of said inflatable restraint to inflate said inflatable restraint;

said flexible member having a first end portion which is disposed in said inflation fluid volume adjacent to said at least one fabric panel when said inflatable restraint is in the deflated condition.

18. An apparatus as set forth in claim 17 wherein said at least one fabric panel includes a front panel and a back panel of said inflatable restraint, said first end portion of said flexible member extending in said inflation fluid volume between said front panel and said back panel, said flexible member having a second end portion which encircles said inflatable restraint when said inflatable restraint is in the deflated condition.

19. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated condition and an inflated condition for protecting an occupant of a vehicle, said inflatable restraint having at least one fabric panel defining an inflation fluid volume for receiving inflation fluid to inflate said inflatable restraint; and

a fluid impermeable flexible member wrapped around said inflatable restraint when said inflatable restraint is in the deflated condition;

said flexible member having an opening for directing inflation fluid to flow in a predetermined flow path into said inflation fluid volume of said inflatable restraint to inflate said inflatable restraint;

said flexible member including a plurality of layers which cover said inflatable restraint when said inflatable restraint is in the deflated condition, said plurality of layers including a single layer which overlies a predetermined portion of said inflatable restraint which inflates first, said single layer including said opening.

20. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated condition and an inflated condition for protecting an occupant of a vehicle, said inflatable restraint having at least one fabric panel defining an inflation fluid volume for receiving inflation fluid to inflate said inflatable restraint;

a fluid impermeable flexible member wrapped around said inflatable restraint when said inflatable restraint is in the deflated condition;

said flexible member having an opening for directing inflation fluid to flow in a predetermined flow path into said inflation fluid volume of said inflatable restraint to inflate said inflatable restraint; and

an inflator for supplying inflation fluid to said inflatable restraint to inflate said inflatable restraint;

said inflatable restraint having a first part and a second part which are presented toward said inflator when said inflatable restraint is in the deflated condition;

said flexible member including a plurality of layers which extend between said first part of said inflatable restraint and said inflator;

said flexible member including a single layer which extends between said second part of said inflatable restraint and said inflator;

said single layer of said flexible member including said opening, said opening being disposed between said inflator and said second part of said inflatable restraint for receiving inflation fluid from said inflator and for directing inflation fluid through said single layer into said second part of said inflatable restraint to cause said second part of said inflatable restraint to inflate first.

21. A vehicle safety apparatus comprising:

an inflatable vehicle occupant restraint having a deflated folded condition and an inflated condition for protecting an occupant of a vehicle;

a retaining ring securable to said inflatable restraint, said retaining ring containing at least a portion of said inflatable restraint when said inflatable restraint is in said folded condition; and

a flexible wrap encircling said folded inflatable restraint and said retaining ring, and maintaining said folded inflatable restraint in said folded condition, said flexible wrap having portions which are secured together to maintain said wrap in an encircling relation with said folded inflatable restraint when said inflatable restraint is in the deflated folded condition;

said flexible wrap having an opening for receiving inflation fluid and for directing inflation fluid into said deflated inflatable restraint to cause said inflatable restraint to inflate.