Anti-telescoping inflatable curtain

• US 20070126214A1
• Filed: 12/01/2005
• Published: 06/07/2007
• Est. Priority Date: 12/01/2005
• Status: Active Grant

• 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: White, Michael, Quach, Thanh
• Granted Patent: US 7,516,978 B2
• Time in Patent Office: Days
• US Class Current: 280/730.200
• CPC Class Codes: B60R 21/213 in vehicle roof frames or pillars
• CPC Class Codes: B60R 21/232 Curtain-type airbags deploying mainly in a vertical direction from their top edge
• CPC Class Codes: B60R 21/237 characterised by the way they are folded

Abstract

An apparatus (10) for helping to protect an occupant (28) of a vehicle (12) that has a side structure (16) and a roof (18). The apparatus (10) includes an inflatable vehicle occupant protection device (14) having a stored condition in which the protection device is deflated, rolled up, and positioned extending along the vehicle roof (18). The protection device (16) is inflatable away from the vehicle roof (18) to a deployed condition positioned between the side structure (16) and the vehicle occupant (28). The apparatus (10) also includes a housing (40) for the protection device (16) when in the stored condition. At least one of the housing (40) and the protection device (16) include a portion (200) for blocking telescoping movement of the protection device (14).

Claims

1. An apparatus for helping to protect an occupant of a vehicle that has a side structure and a roof, the apparatus comprising:

an inflatable vehicle occupant protection device having a stored condition in which the protection device is deflated, rolled up, and positioned extending along the vehicle roof, the protection device being inflatable away from the vehicle roof to a deployed condition positioned between the side structure and a vehicle occupant; and

a housing for the protection device when in the stored condition, at least one of the housing and the protection device comprising a portion for blocking telescoping movement of the protection device.

2. The apparatus recited in claim 1, wherein the portion for blocking telescoping movement comprises a portion of the housing that blocks telescoping movement of the protection device.

3. The apparatus recited in claim 1, further comprising a tether having a first end portion connected to the protection device and an opposite second end portion connectable with the side structure of the vehicle, wherein the portion for blocking telescoping movement comprises an opening in a sheet of material through which the tether extends to help block the protection device from telescoping.

4. The apparatus recited in claim 3, wherein the opening is sized so as to form an interference fit with the tether to help maintain the position of the tether in the opening.

5. The apparatus recited in claim 3, wherein the housing comprises a tear seam that intersects the opening, the tear seam being rupturable upon inflation of the protection device to allow the protection device to inflate and deploy and to release the tether from the opening.

6. The apparatus recited in claim 1, wherein the housing comprises a fabric sheath wrapped around the protection device while deflated and rolled up to help support the protection device in the stored condition, the portion for blocking telescoping movement comprising portions of the sheath that are folded over to block the protection device from telescoping.

7. The apparatus recited in claim 6, wherein the folded portions of the sheath place an open end portion of the sheath in a tapered configuration that helps prevent the protection device from telescoping through the open end portion.

8. The apparatus recited in claim 7, further comprising an adhesive for securing the portions of the sheath while folded over to help block telescoping movement of the protection device through the open end portion.

9. The apparatus recited in claim 6, further comprising a tether having a first end portion connected to the protection device and an opposite second end portion connectable with the side structure of the vehicle, wherein the folded portions of the sheath are folded around the tether to allow the tether to extend outside the sheath while the protection device is in the stored condition inside the sheath.

10. The apparatus recited in claim 1, wherein the protection device has a terminal edge portion arranged in a generally spiral configuration when the protection device is in the stored condition, the portion for blocking telescoping movement helping maintain the spiral configuration of the terminal edge portion while the protection device is supported in the stored condition by the housing.

11. The apparatus recited in claim 10, wherein the portion for blocking telescoping movement of the protection device helps prevent relative axial displacement of portions of the protection device that would place the edge portion of the protection device in a helical configuration.

12. The apparatus recited in claim 1, wherein the protection device when in the stored position is rolled about a roll axis such that an imaginary line on the protection device perpendicular to the roll axis is rolled up into a generally spiral configuration when the protection device is rolled up, the portion for blocking telescoping movement helping maintain the spiral configuration of the imaginary line while the protection device is supported in the stored condition by the housing.

13. The apparatus recited in claim 12, wherein the portion for blocking telescoping movement of the protection device helps prevent relative axial displacement of portions of the protection device that would place the imaginary line in a helical configuration.