Airbag having a filling piece and airbag arrangement having an airbag and a gas generator

• US 20100225098A1
• Filed: 05/19/2010
• Published: 09/09/2010
• Est. Priority Date: 11/20/2007
• Status: Active Grant

• Current Assignee: Joyson Safety Systems Germany GmbH (Ningbo Junsheng Investment Group Co., Ltd.)
• Original Assignee: Takata - Petri AG (Ningbo Junsheng Investment Group Co., Ltd.)
• Inventors: Baumgartner, Peter, Leifheit, Markus, Steck, Thomas
• Granted Patent: US 8,342,571 B2
• Time in Patent Office: Days
• US Class Current: 280/736
• CPC Class Codes: B60R 2021/23123 Heat protection panels
• CPC Class Codes: B60R 21/231 characterised by their shape, construction or spatial configuration
• CPC Class Codes: B60R 21/233 comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other B60R21/232 takes precedence
• CPC Class Codes: B60R 21/2346 Soft diffusers
• CPC Class Codes: B60R 21/237 characterised by the way they are folded

Abstract

The invention relates to an airbag, the airbag comprising a tubular area and a filling piece for filling the airbag with gas of a gas generator, wherein the filling piece is formed by putting-over the tubular area of the airbag. In one embodiment, the filling piece is formed by putting-over the tubular area of the airbag in the longitudinal direction, wherein an end of the put-over tubular area faces the airbag interior and said end of the put-over tubular area comprises one or several openings which are arranged to distribute gas inflowing from a gas generator in a targeted manner into the airbag.

Claims

1. Airbag, the airbag comprising:

a tubular area,

a filling piece for filling the airbag with gas of a gas generator,

the filling piece being formed by putting-over the tubular area of the airbag in the longitudinal direction,

wherein an end of the put-over tubular area faces the airbag interior,

and wherein said end of the put-over tubular area comprises one or several openings which are arranged to distribute gas inflowing from a gas generator in a targeted manner into the airbag.

2. Airbag according to claim 1, wherein the end of the tubular area facing the airbag interior after it has been put over reaches into the airbag interior.

3. Airbag according to claim 1, wherein the openings are defined by one or several seams or by holes in the tubular area.

4. Airbag according to claim 3, wherein there is provided as least one seam at the face side end of the tubular area, said seam defining at least two gas exit holes.

5. Airbag according to claim 1, wherein the tubular area is configured such that when filling the airbag with gas the inflowing gas is distributed by means of two partial gas streams in the airbag in a defined manner.

6. Airbag according to claim 1, wherein the put-over tubular area has one or more lateral openings which serve for a targeted distribution of gas in the airbag.

7. Airbag according to claim 1, wherein the airbag possesses an outer edge extending longitudinally and in that the part of the tubular area to be everted extends essentially parallel to the outer edge before its everting.

8. Airbag according to claim 1, wherein the end of the tubular area facing the airbag interior after it has been everted is beveled.

13. Airbag according to claim 1, wherein the filling piece is formed such that it is suited to receive at least a section of a gas generator and can be fixed to the gas generator.

14. Airbag according to claim 1, wherein the filling piece is formed such that it is suited for receiving at least a section of a diffuser and can be fixed to the diffuser or to a gas generator connected to the diffuser.

19. Airbag according to claim 1, wherein the put-over tubular area reaches into the airbag interior and therein forms a diffuser which distributes gas of a gas generator in a targeted manner in the airbag.

20. Airbag according to claim 19, wherein the diffuser is configured to guide gas of a gas generator via one or several gas exit openings directly into the airbag.

9. Airbag, the airbag comprising:

a tubular area,

a filling piece for filling the airbag with gas of a gas generator,

the filling piece being formed by putting-over the tubular area of the airbag in the longitudinal direction, and

at least one additional reinforcing layer,

said at least one additional reinforcing layer being secured to the tubular area,

said at least one additional reinforcing layer being at least partially also put-over during putting-over of the tubular area.

10. Airbag according to claim 9, wherein the at least one additional reinforcing layer comprises two fabric pieces wherein the fabric piece in each case is sewed or glued to the upper side and the lower side of the tubular area.

11. Airbag according to claim 9, wherein the at least on additional reinforcing layer comprises a fabric piece which is laid around the tubular area and is sewed or glued at its ends to the tubular area.

12. Airbag according to claim 9, wherein areas of the at least one additional reinforcing layer are connected to each other in such a way that they partially close the end of the tubular area, wherein the non-closed areas form one or more openings which distribute the inflowing gas in the airbag in a targeted manner during filling the airbag.

15. Airbag, the airbag comprising:

a tubular area,

a filling piece for filling the airbag with gas of a gas generator,

the filling piece being formed by putting-over the tubular area of the airbag in cross direction.

16. Airbag according to claim 15, wherein the filling piece is formed by putting-over a tubular area being open at both ends in cross direction.

17. Airbag according to claim 15, wherein the tubular area forms an essentially cylinder-shaped diffuser in the interior of the airbag after the putting-over in cross direction.

18. Airbag according to any claim 15, wherein the tubular area forms two tabs at the outside of the airbag after the putting-over in cross direction, which tabs can be flapped onto each other.