GB2243119A - A vehicle air bag with inflation control straps - Google Patents
A vehicle air bag with inflation control straps Download PDFInfo
- Publication number
- GB2243119A GB2243119A GB9005453A GB9005453A GB2243119A GB 2243119 A GB2243119 A GB 2243119A GB 9005453 A GB9005453 A GB 9005453A GB 9005453 A GB9005453 A GB 9005453A GB 2243119 A GB2243119 A GB 2243119A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bag
- stitching
- straps
- envelope
- patch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 description 10
- 230000006378 damage Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
- B60R21/2338—Tethers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
- B60R21/2338—Tethers
- B60R2021/23382—Internal tether means
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
The bag includes a gas retaining envelope 1, 2 and tie straps 5 located within the envelope 1, 2. The tie straps 5 are stitched with fine stitching 9 to a central portion 6 of the topside 11 which is closest to the occupant of the vehicle. The stitching within the envelope is covered and protected from hot inflating gases by a patch 10. In the event of a crash, the bag will inflate and the occupant will impact upon the topside 1 and the stitching 9 which, because it is fine, will not abrade the occupant. The patch, straps and bag are vulcanised together. <IMAGE>
Description
INFLATABLE BAGS
This invention relates to an inflatable bag or cushion adapted to be used in a vehicle to protect an occupant against injury in the event of a crash by inflating rapidly so as to restrain forward movement of the occupant. Such bags or cushions are commonly known as vehicle crash bags.
Known vehicle crash bags are composed of pieces of composite rubber and textile material which are secured together to form an outer envelope with internal straps that act as ties to limit expansion of the bag and control its fully inflated shape. An additional piece of material, usually in the form of an octagonal patch, is provided internally of the bag to cover the straps and protect both straps and bag from heat damage caused by high gas temperatures when the bag is inflated rapidly. These pieces of material have been secured together by stitching, but this needs to be protected against heat damage internally, for example, by coating with a bead of RTV or similar material, and can also present an abrasion hazard externally for an occupant's face striking the bag under crash conditions.
As an alternative to stitching, the pieces of material that make up the crash bag have been secured together by vulcanisation which avoids all the above problems with stitching. However, vulcanised seams can open due to a process of de-lamination, especially under low temperature conditions.
An object of the present invention is to provide an improved crash bag in which the pieces thereof are secured together in a manner which is less vulnerable to heat damage or low temperatures and which reduces abrasion hazards.
According to the present invention, the outer material of a crash bag is secured to an internal tie strap by fine stitching, a heat protective patch is applied to cover the strap and stitching internally of the bag, and the outer material, strap and patch are vulcanised together.
The use of stitching serves to protect the connection between the outer material of the bag and the internal strap against failure due to delamination. However, the stitching need only involve the use of fine grade thread, for example 30 grade thread as opposed to 20 grade thread normally used in the stitching of crash bags.
This gives adequate strength without producing an abrasion problem. Further, by not stitching the protective patch, the stitching is protected from heat by the patch.
A crash bag according to the invention is illustrated in the ac-ompanying drawing of a section through part of a crash bag. The bag comprises a topside 1 and an underside 2 which are secured together around their periphery at 11.
The underside 2 is provided with a central aperture 3 at which the edge of the fabric is attached to a ring 4 by which the bag is connected to inflation means (not shown).
Two pairs of straps 5 are connected internally to the bag between the underside 2 and the central portion 6 of the topside 1 so as to limit expansion of the bag along the central axis X - X of the bag. Each pair of straps 5 is arranged on a plane through the axis X - X perpendicular to the other pair of straps. Further, each pair of straps 5 is formed from a single length of material which is connected by stitching 7 at its free ends to the underside 2 on opposite sides of the ring 4, and which has an intermediate portion 8 fastened to the central portion 6 of the topside 1 by a single ring of fine stitching 9. This stitching employs grade 30 polyester thread.A heat protective patch 10 of octagonal shape is provided internally of the bag overlapping the two intermediate strap portions 8 and the central portion 6, and all of these are secured together by a vulcanisation process, the topside 1, the straps 5 and the patch 10 all being composed of suitable composite rubber and textile sheet material that can be joined by vulcanisation. A folded hinge member 12 is provided in the angle between each strap 5 and the topside 1 and is secured by vulcanisation so as to reinforce the joint therebetween. A similar folded hinge member 13 is provided between the topside 1 and underside 2 to reinforce the joint 11.
It will be appreciated that the stitching 9, because it employs fine grade thread, does not produce a significant abrasion hazard on the outer surface of the central portion 6. If required, finer grade thread such as grade 50 can be used and has been found to give adequate strength.
Further, the protective patch 10 serves to cover the stitching 9 and protect it against heat damage.
Claims (4)
1. A vehicle crash bag comprising an outer envelope, at least one tie strap secured to an inner surface of the envelope by fine stitching and a heat protective patch applied to cover the fine stitching within the envelope, the envelope, strap and patch being vulcanised together.
2. A vehicle crash bag as claimed in claim 1 wherein a hinge member is provided in an angle formed between the strap and the inner surface.
3. A vehicle crash bag as claimed in claim 2 wherein the hinge member is vulcanised to the strap and inner surface.
4. A vehicle crash bag substantially as described herein with reference to and illustrated by the accompanying drawing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9005453A GB2243119A (en) | 1990-03-10 | 1990-03-10 | A vehicle air bag with inflation control straps |
| DE9102740U DE9102740U1 (en) | 1990-03-10 | 1991-03-07 | Airbag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9005453A GB2243119A (en) | 1990-03-10 | 1990-03-10 | A vehicle air bag with inflation control straps |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9005453D0 GB9005453D0 (en) | 1990-05-09 |
| GB2243119A true GB2243119A (en) | 1991-10-23 |
Family
ID=10672424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9005453A Withdrawn GB2243119A (en) | 1990-03-10 | 1990-03-10 | A vehicle air bag with inflation control straps |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE9102740U1 (en) |
| GB (1) | GB2243119A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2252083A (en) * | 1991-01-22 | 1992-07-29 | Dowty Woodville Polymer Ltd | Heat resistant vehicle crash bag. |
| EP0856435A1 (en) | 1997-01-29 | 1998-08-05 | TRW Occupant Restraint Systems GmbH & Co. KG | Airbag |
| WO2000001559A1 (en) * | 1998-07-06 | 2000-01-13 | American Components, Inc. | Roll-over airbag |
| WO2001023183A1 (en) * | 1999-09-24 | 2001-04-05 | American Components, Inc. | Roll-over air bag with reinforced seal and method of sealing |
| US6257618B1 (en) * | 1995-04-28 | 2001-07-10 | Daimler-Benz Aktiengesellschaft | Collision protection device, especially for vehicle passengers |
| WO2002037941A3 (en) * | 2000-11-13 | 2002-12-27 | Milliken & Co | Air bag tether system comprising multi-segment tethers |
| US6715791B2 (en) | 2001-04-06 | 2004-04-06 | Milliken & Company | Air bag tether system comprising multiple segments cut in alignment with fabric warp of fill |
| US6733037B1 (en) | 2000-11-13 | 2004-05-11 | Milliken & Company | Multi-segment air bag tether construction |
| US6783155B2 (en) | 2000-04-14 | 2004-08-31 | Milliken & Company | Air bag tether construction |
| US6938922B2 (en) | 2000-04-14 | 2005-09-06 | Milliken & Company | Air bag tether construction |
| US8910319B2 (en) | 2008-12-09 | 2014-12-16 | Dainese S.P.A. | Garment adapted to be associated to a device for the personal protection of a user |
| US9027170B2 (en) | 2008-12-09 | 2015-05-12 | Dainese S.P.A. | Personal protection device and garment incorporating said device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59403012D1 (en) * | 1993-12-18 | 1997-07-10 | Porsche Ag | Impact protection device for occupants of a motor vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4887842A (en) * | 1987-08-17 | 1989-12-19 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Gas bag |
| GB2229680A (en) * | 1989-03-28 | 1990-10-03 | Takata Corp | An inflatable air bag for protection of a vehicle occupant |
-
1990
- 1990-03-10 GB GB9005453A patent/GB2243119A/en not_active Withdrawn
-
1991
- 1991-03-07 DE DE9102740U patent/DE9102740U1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4887842A (en) * | 1987-08-17 | 1989-12-19 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Gas bag |
| GB2229680A (en) * | 1989-03-28 | 1990-10-03 | Takata Corp | An inflatable air bag for protection of a vehicle occupant |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2252083A (en) * | 1991-01-22 | 1992-07-29 | Dowty Woodville Polymer Ltd | Heat resistant vehicle crash bag. |
| US6257618B1 (en) * | 1995-04-28 | 2001-07-10 | Daimler-Benz Aktiengesellschaft | Collision protection device, especially for vehicle passengers |
| EP0856435A1 (en) | 1997-01-29 | 1998-08-05 | TRW Occupant Restraint Systems GmbH & Co. KG | Airbag |
| EP1117566A4 (en) * | 1998-07-06 | 2003-06-25 | Methode Electronics Inc | Roll-over airbag |
| WO2000001559A1 (en) * | 1998-07-06 | 2000-01-13 | American Components, Inc. | Roll-over airbag |
| US6113141A (en) * | 1998-07-06 | 2000-09-05 | American Components, Inc. | Roll-over air bag |
| US6355123B1 (en) | 1998-07-06 | 2002-03-12 | Methode Electronics, Inc. | Roll-over air bag having a reinforced perimeter seal and associated method for producing a flat reinforced seal in a roll-over air bag |
| WO2001023183A1 (en) * | 1999-09-24 | 2001-04-05 | American Components, Inc. | Roll-over air bag with reinforced seal and method of sealing |
| US6783155B2 (en) | 2000-04-14 | 2004-08-31 | Milliken & Company | Air bag tether construction |
| US6938922B2 (en) | 2000-04-14 | 2005-09-06 | Milliken & Company | Air bag tether construction |
| WO2002037941A3 (en) * | 2000-11-13 | 2002-12-27 | Milliken & Co | Air bag tether system comprising multi-segment tethers |
| US6733037B1 (en) | 2000-11-13 | 2004-05-11 | Milliken & Company | Multi-segment air bag tether construction |
| US6796583B2 (en) * | 2000-11-13 | 2004-09-28 | Milliken & Company | Air bag tether system comprising multi-segment tethers |
| US6930065B2 (en) | 2000-11-13 | 2005-08-16 | Milliken & Company | Fabric blank for multi-segment air bag tether construction |
| US6715791B2 (en) | 2001-04-06 | 2004-04-06 | Milliken & Company | Air bag tether system comprising multiple segments cut in alignment with fabric warp of fill |
| US8910319B2 (en) | 2008-12-09 | 2014-12-16 | Dainese S.P.A. | Garment adapted to be associated to a device for the personal protection of a user |
| US9027170B2 (en) | 2008-12-09 | 2015-05-12 | Dainese S.P.A. | Personal protection device and garment incorporating said device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9005453D0 (en) | 1990-05-09 |
| DE9102740U1 (en) | 1991-08-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |