Folded air bag

• US 5,275,435 A
• Filed: 08/04/1992
• Issued: 01/04/1994
• Est. Priority Date: 08/04/1992
• Status: Expired due to Term

• 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: Fischer, Kurt F.
• Primary Examiner(s): Culbreth, Eric D.
• Application Number:
  US07/925,579
• Time in Patent Office: 518 Days
• Field of Search: 280/743, 280/728, 280/730, 493/243, 493/405
• US Class Current: 280/743.1
• CPC Class Codes: B60R 21/237 characterised by the way they are folded

Abstract

An inflatable air bag for restraining an occupant of a vehicle has a deflated, folded condition and an inflated, unfolded condition. When in the folded condition, the air bag has a plurality of folded portions disposed in a stack adjacent to an inflator assembly. A first folded portion is disposed in an outer portion of the stack furthest from the inflator assembly and closest to the occupant. As the air bag inflates, the first folded portion pivots and moves sideways as it moves outwardly from the stack to contact the vehicle occupant. The first folded portion directs the vehicle occupant off to one side of the inflating air bag, and the remainder of the air bag inflates off to the side of the vehicle occupant. As a result, the vehicle occupant does not receive the full force of the inflating air bag.

Claims

1. An inflatable air bag for, when inflated by an inflator assembly, restraining an occupant of a vehicle,

said air bag having a deflated, folded condition and an inflated, unfolded condition for restraining a vehicle occupant,

said air bag having an inflation fluid receiving opening for receiving inflation fluid from the inflator assembly to inflate said air bag,

said air bag when in the folded condition having a plurality of folded portions disposed in a stack adjacent to the inflator assembly, said folded portions including means for moving an out of position occupant sideways in the vehicle prior to full inflation of said air bag, said means for moving an out of position occupant comprising a first flap portion of said air bag and means for connecting said first flap portion of said air bag for sideways pivotal movement relative to the stack during inflation of said air bag to move said first flap portion of said air bag sideways in the vehicle across a lateral centerline of the stack with sufficient force to move an out of position vehicle occupant sideways during inflation of said air bag,

said first flap portion being disposed in an outer portion of the stack furthest from the inflator assembly and closest to the occupant,

said air bag having a first portion which is the first portion of said air bag to inflate into the unfolded condition for restraining a vehicle occupant, said first lap portion comprising said first portion,

said air bag having surfaces defining a first inflation fluid flow path extending from the inflation fluid receiving opening to said first flap portion of said air bag, said surfaces defining said first inflation fluid flow path and defining only one 180°

directional change for said inflation fluid as said air bag is inflated from the deflated, folded condition into the unfolded condition.

2. An inflatable air bag as set forth in claim 1 wherein said plurality of folded portions includes a laterally central portion of said air bag, said first flap portion being pivotally connected with said laterally central portion of said air bag at a first lateral side of said stack, said laterally central portion of said air bag being disposed closest to the inflator assembly and furthest from the occupant when said air bag is in the folded condition.

3. An inflatable air bag as set forth in claim 1 wherein said air bag when in the inflated, unfolded condition has a laterally central area and two lateral side areas spaced apart on opposite sides of said laterally central area, said air bag when in the deflated, folded condition having a plurality of folded portions disposed in the stack adjacent to the inflator assembly including (i) said outer portion disposed in the stack furthest from the inflator assembly and closest to the occupant and forming one of said first and second lateral side areas of said air bag when said air bag is in the inflated condition, said first flap portion forming said outer portion, and (ii) an inner portion disposed in the stack closer to the inflator assembly than said outer portion and furthest from the occupant and forming said laterally central area of said air bag when said air bag is in the inflated condition.

4. An inflatable air bag for, when inflated by an inflator assembly, restraining an occupant of a vehicle,

said air bag having a deflated, folded condition and an inflated, unfolded condition for restraining a vehicle occupant,

said air bag having an inflation fluid receiving opening for receiving inflation fluid from the inflator assembly to inflate said air bag,

said air bag when in the folded condition having a plurality of folded portions disposed in a stack adjacent to the inflator assembly, said folded portions including means for moving an out of position occupant sideways in the vehicle prior to full inflation of said air bag, said means for moving an out of position occupant comprising a first flap portion of said air bag and means for connecting said first flap portion of said air bag for pivotal movement relative to the stack during inflation of said air bag to move said first flap portion of said air bag sideways in the vehicle with sufficient force to move an out of position vehicle occupant sideways during inflation of said air bag,

said first flap portion being disposed in an outer portion of the stack furthest from the inflator assembly and closest to the occupant,

said air bag having a first portion which is the first portion of said air bag to inflate into the unfolded condition for restraining a vehicle occupant, said first flap portion comprising said first portion,

said air bag having surfaces defining a first inflation fluid flow path extending from the inflation fluid receiving opening to said first flap portion of said air bag, said surfaces defining said first inflation fluid flow path and defining only one 180°

directional change for said inflation fluid as said air bag is inflated from the deflated, folded condition into the unfolded condition;

said plurality of folded portions including a second flap portion disposed in the stack closer to the inflator assembly than said first flap portion and further from the occupant than said first flap portion when said air bag is in the folded condition,

said air bag having surfaces defining a second inflation fluid flow path extending from the inflation fluid receiving opening to said second flap portion of said air bag and defining only one 180°

directional change for said inflation fluid as said air bag is inflated from the deflated, folded condition.

5. An inflatable air bag as set forth in claim 4 wherein said second flap portion of said air bag is pivotally connected with a laterally central portion of said air bag at a lateral side of said stack.