US20130221644A1 - Airbag with multi-state vent - Google Patents
Airbag with multi-state vent Download PDFInfo
- Publication number
- US20130221644A1 US20130221644A1 US13/771,488 US201313771488A US2013221644A1 US 20130221644 A1 US20130221644 A1 US 20130221644A1 US 201313771488 A US201313771488 A US 201313771488A US 2013221644 A1 US2013221644 A1 US 2013221644A1
- Authority
- US
- United States
- Prior art keywords
- vent
- air bag
- tether
- flap
- sliding member
- 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.)
- Abandoned
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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
- B60R21/239—Inflatable members characterised by their venting means
-
- 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
-
- 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
- B60R21/239—Inflatable members characterised by their venting means
- B60R2021/2395—Inflatable members characterised by their venting means comprising means to control the venting
Definitions
- the present invention relates to airbags with venting mechanisms and more particularly with the airbag having a tri-state vent mechanism.
- the present invention includes, an air bag having a tri-state vent, in an initial state the vent is configured to be closed, the vent in a medial state configured to be at least partially open or fully open as the air bag is starting to inflate, permitting some inflator gas to exit through the vent, and the vent in a final state configured to be at least partially closed or fully closed as the air bag continues to inflate,
- FIG. 1 diagrammatically illustrates a portion of the passenger compartment of the vehicle and illustrates typical seating positions of the small and large occupant.
- FIG. 2 illustrates the placement of a valve mechanism using the present invention relative to the other portions of an air bag.
- FIG. 3 diagrammatically illustrates the present valve mechanism can be used with dual depth airbags.
- FIG. 4 is a cross-sectional view showing the major elements of the valve mechanism.
- FIG. 5 is a plan view of the valve mechanism viewed from the interior of the air bag looking outwardly.
- FIGS. 6 a and FIG. 6 b illustrate parameters of the effective mechanism.
- FIG. 7 illustrates a change of state of the vent mechanism from closed to open.
- FIG. 8 shows another plan view of the vent mechanism.
- FIGS. 9 and 10 show the vent mechanism in a partially closed condition.
- FIGS. 11 and 12 show the vent mechanism in a fully closed condition.
- FIG. 1 illustrates a portion of a typical passenger compartment 500 of a vehicle 502 .
- a vehicle seat 504 is shown in a forward seating position and a rearward seating position 504 a.
- An occupant 510 of a small stature, such as a 5th percentile female, is shown seated upon seat 504 in the forward position.
- a relatively larger occupant 512 such as a 50 th percentile or 95th percentile male is shown seated upon the vehicle seat in its rearward position.
- Dotted line 520 illustrates a plane of contact between airbag 530 and occupant 510 while dotted line 522 is illustrative of a plane of contact 522 between airbag 530 and the larger occupant 512 .
- FIG. 1 illustrates a portion of a typical passenger compartment 500 of a vehicle 502 .
- a vehicle seat 504 is shown in a forward seating position and a rearward seating position 504 a.
- the airbag is located in a portion of the instrument panel 532 and when inflated may react against the vehicle windshield 534 and then move toward the occupant to be protected.
- Arrow 540 illustrates the direction of expansion of the airbag 530
- dotted line 530 a shows the airbag in a more inflated condition, protecting the larger sized occupant 512 in the presumed rearward seating position.
- Vent mechanism 600 can be located on any surface of the air bag; in the illustrated embodiment, the vent mechanism 600 is located on a side 550 of airbag 530 . Other vent mechanisms may be positioned on the other regions of the air bag.
- Vent mechanism 600 includes a tether 602 .
- the tether has an end 604 that is connected to region 606 of the air bag. This connection can be created using sewn stitches or a sonic weld or other similar method. As the air bag inflates, the tether moves with region 606 of the airbag and is pulled progressively taut which aids in the change of state of the vent mechanism 600 .
- FIG. 3 shows a dual depth airbag 531 .
- FIG. 3 shows the present vent mechanism 600 can also be used in airbags known as dual depth airbags.
- an additional tether 580 is connected to a region such as 582 of the bag.
- a remote end 584 of the tether 580 is connected to a tether release mechanism 586 . If the tether release mechanism maintains its hold on tether 580 the airbag is restricted in size. If on the other hand the tether release mechanism 586 releases tether 580 the airbag 531 is permitted to inflate fully to a larger size.
- the valve mechanism 600 of the present invention is shown at two locations on the airbag 531 .
- Valve mechanism 600 includes a portion of the side or side panel 550 of airbag 530 .
- a first vent opening 601 is located on side panel 550 .
- the flap 610 is positioned in a closing relation over to opening 601 .
- a side 612 of flap 610 is secured to panel 550 such as by a sewn seam 614 or by some other method including adhesive, sonic welding or other similar method as is known in the art.
- Vent mechanism 600 further includes a sliding panel 620 which is shown, in FIGS. 4 and 5 , in a folded or compact orientation such as a roll. Tether 602 is secured at location 622 to sliding panel 620 .
- the pocket 630 includes multiple sides 632 and is sewn or otherwise peripherally attached to panel 550 .
- FIG. 5 shows a sewn seam 634 peripherally securing the pocket 632 to air bag panel 550 .
- Pocket 630 includes a small opening 636 through which tether 602 extends.
- the pocket 630 includes a second vent opening which is in general in registration with the first vent opening 601 .
- Opening 638 is generally the same size as opening 601 , however opening 638 can be smaller or larger than opening 601 as generally illustrated in FIGS. 6 a and 6 b .
- each of the elements of the vent mechanism 600 would lie one on top of the other and the various spaces shown between each element 550 , 601 , 602 , 620 and 630 in the figures are shown for the purpose of illustration. Additionally, various figures, again for the purpose of illustration, show the openings of the vent mechanism can be circular and rectangular.
- vent mechanism 600 When airbag 530 is folded, the components of vent mechanism 600 are in the condition as illustrated in FIG. 4 with the flap 610 closing the first vent opening 601 .
- the interior of the air bag will be pressurized by the inflation gas received from the inflator X to a first pressure P 1 .
- the level of pressure P 1 can be determined empirically or by measurement during development of the vent mechanism.
- FIG. 4 includes an arrow 640 which shows the direction of pressure P 1 . This pressure also acts across the total area of the pocket 630 with the exception of the area of opening 634 .
- FIG. 8 is another plan view of the underside of vent mechanism 600 . As can be seen in this state the sliding panel 620 has not moved to close opening 638 . The tether 602 crosses openings 601 and 638 .
- FIG. 2 As the air bag continues to inflate in the direction toward the occupant, a tension T, in tether 602 increases to a level sufficient to begin to pull the sliding panel across opening 638 .
- the tension, T, acting on tether 602 has pulled the sliding panel 620 partially across opening 638 to partially close openings 638 and 601 .
- the amount of inflation gas that is permitted to exit vent opening 601 is reduced. This relationship is also shown in FIG. 10 .
- the tension T acting on the tether pulls the sliding panel 630 fully across opening 638 to prevent further inflation gas from exiting vent hole 601 , thereby closing the vent mechanism 600 .
- the length of tether 602 and the size and position of the sliding panel 620 are chosen so the vent mechanism 600 reaches the partially enclosed condition just after the airbag passes plane 520 , that is just after the airbag is sufficiently inflated to protect the smaller occupant at the presumed seated location of the smaller occupant.
- FIGS. 11 and 12 show this closed relationship.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
Description
- The present invention relates to airbags with venting mechanisms and more particularly with the airbag having a tri-state vent mechanism.
- The present invention includes, an air bag having a tri-state vent, in an initial state the vent is configured to be closed, the vent in a medial state configured to be at least partially open or fully open as the air bag is starting to inflate, permitting some inflator gas to exit through the vent, and the vent in a final state configured to be at least partially closed or fully closed as the air bag continues to inflate,
-
FIG. 1 diagrammatically illustrates a portion of the passenger compartment of the vehicle and illustrates typical seating positions of the small and large occupant. -
FIG. 2 illustrates the placement of a valve mechanism using the present invention relative to the other portions of an air bag. -
FIG. 3 diagrammatically illustrates the present valve mechanism can be used with dual depth airbags. -
FIG. 4 is a cross-sectional view showing the major elements of the valve mechanism. -
FIG. 5 is a plan view of the valve mechanism viewed from the interior of the air bag looking outwardly. -
FIGS. 6 a andFIG. 6 b illustrate parameters of the effective mechanism. -
FIG. 7 illustrates a change of state of the vent mechanism from closed to open. -
FIG. 8 shows another plan view of the vent mechanism. -
FIGS. 9 and 10 show the vent mechanism in a partially closed condition. -
FIGS. 11 and 12 show the vent mechanism in a fully closed condition. -
FIG. 1 illustrates a portion of atypical passenger compartment 500 of avehicle 502. Avehicle seat 504 is shown in a forward seating position and arearward seating position 504 a. Anoccupant 510 of a small stature, such as a 5th percentile female, is shown seated uponseat 504 in the forward position. A relativelylarger occupant 512 such as a 50th percentile or 95th percentile male is shown seated upon the vehicle seat in its rearward position.Dotted line 520 illustrates a plane of contact betweenairbag 530 andoccupant 510 while dottedline 522 is illustrative of a plane ofcontact 522 betweenairbag 530 and thelarger occupant 512. In the example ofFIG. 1 the airbag is located in a portion of theinstrument panel 532 and when inflated may react against thevehicle windshield 534 and then move toward the occupant to be protected. Arrow 540 illustrates the direction of expansion of theairbag 530, dotted line 530 a shows the airbag in a more inflated condition, protecting the larger sizedoccupant 512 in the presumed rearward seating position. - Reference is briefly made to
FIG. 2 which showsairbag 530 in the partially inflated condition.Vent mechanism 600 can be located on any surface of the air bag; in the illustrated embodiment, thevent mechanism 600 is located on aside 550 ofairbag 530. Other vent mechanisms may be positioned on the other regions of the air bag.Vent mechanism 600 includes atether 602. The tether has anend 604 that is connected toregion 606 of the air bag. This connection can be created using sewn stitches or a sonic weld or other similar method. As the air bag inflates, the tether moves withregion 606 of the airbag and is pulled progressively taut which aids in the change of state of thevent mechanism 600. - Reference is briefly made to
FIG. 3 which shows adual depth airbag 531.FIG. 3 shows thepresent vent mechanism 600 can also be used in airbags known as dual depth airbags. In this type of airbag anadditional tether 580 is connected to a region such as 582 of the bag. Aremote end 584 of thetether 580 is connected to atether release mechanism 586. If the tether release mechanism maintains its hold ontether 580 the airbag is restricted in size. If on the other hand thetether release mechanism 586 releases tether 580 theairbag 531 is permitted to inflate fully to a larger size. Thevalve mechanism 600 of the present invention is shown at two locations on theairbag 531. - Reference is made to
FIGS. 4 and 5 which show further features ofvalve mechanism 600.Valve mechanism 600 includes a portion of the side orside panel 550 ofairbag 530. Afirst vent opening 601 is located onside panel 550. Theflap 610 is positioned in a closing relation over to opening 601. Aside 612 offlap 610 is secured topanel 550 such as by asewn seam 614 or by some other method including adhesive, sonic welding or other similar method as is known in the art.Vent mechanism 600 further includes asliding panel 620 which is shown, inFIGS. 4 and 5 , in a folded or compact orientation such as a roll. Tether 602 is secured atlocation 622 to slidingpanel 620. As mentioned above the other end of thetether 602 is connected toregion 606 of theairbag panel 550. The slidingpanel 620 andflap 610 are protected by a pocket orjacket 630. Thepocket 630 includesmultiple sides 632 and is sewn or otherwise peripherally attached topanel 550.FIG. 5 shows a sewn seam 634 peripherally securing thepocket 632 toair bag panel 550. Pocket 630 includes asmall opening 636 through whichtether 602 extends. Thepocket 630 includes a second vent opening which is in general in registration with the first vent opening 601.Opening 638 is generally the same size as opening 601, however opening 638 can be smaller or larger than opening 601 as generally illustrated inFIGS. 6 a and 6 b. It should be appreciated by those skilled in the art that each of the elements of thevent mechanism 600 would lie one on top of the other and the various spaces shown between eachelement - When
airbag 530 is folded, the components ofvent mechanism 600 are in the condition as illustrated inFIG. 4 with theflap 610 closing the first vent opening 601. As the air bag becomes at least partially inflated to a size where the airbag approachesplane 520, which is illustrative of the smaller seated occupant, the interior of the air bag will be pressurized by the inflation gas received from the inflator X to a first pressure P1. The level of pressure P1 can be determined empirically or by measurement during development of the vent mechanism.FIG. 4 includes anarrow 640 which shows the direction of pressure P1. This pressure also acts across the total area of thepocket 630 with the exception of the area of opening 634. This pressure will act on the interior surface offlap 610, pushing the flap throughopening 601 as illustrated inFIG. 7 and changing the state of the vent mechanism from closed to open. Reference is briefly made toFIG. 8 which is another plan view of the underside ofvent mechanism 600. As can be seen in this state thesliding panel 620 has not moved to close opening 638. Thetether 602 crossesopenings - Reference is briefly made to
FIG. 2 . As the air bag continues to inflate in the direction toward the occupant, a tension T, intether 602 increases to a level sufficient to begin to pull the sliding panel across opening 638. InFIG. 9 the tension, T, acting ontether 602 has pulled thesliding panel 620 partially across opening 638 to partially closeopenings vent opening 601 is reduced. This relationship is also shown inFIG. 10 . Asairbag 530 continues to inflate and moves towardplane 522 into a protective relationship with the occupant seated in the rearward seating position, the tension T acting on the tether pulls the slidingpanel 630 fully across opening 638 to prevent further inflation gas from exitingvent hole 601, thereby closing thevent mechanism 600. Preferably, the length oftether 602 and the size and position of the slidingpanel 620 are chosen so thevent mechanism 600 reaches the partially enclosed condition just after the airbag passesplane 520, that is just after the airbag is sufficiently inflated to protect the smaller occupant at the presumed seated location of the smaller occupant.FIGS. 11 and 12 show this closed relationship. - Many changes and modifications in the above-described embodiment of the invention of course can be carried out without departing from the scope thereof. Accordingly, that scope is intended to be limited only by the scope of the appended claims.
Claims (6)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/771,488 US20130221644A1 (en) | 2012-02-23 | 2013-02-20 | Airbag with multi-state vent |
EP13751344.6A EP2819890B1 (en) | 2012-02-23 | 2013-03-18 | Airbag with multi-state vent |
PCT/US2013/032804 WO2013126929A1 (en) | 2012-02-23 | 2013-03-18 | Airbag with multi-state vent |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261602359P | 2012-02-23 | 2012-02-23 | |
US13/771,488 US20130221644A1 (en) | 2012-02-23 | 2013-02-20 | Airbag with multi-state vent |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130221644A1 true US20130221644A1 (en) | 2013-08-29 |
Family
ID=49002008
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/771,488 Abandoned US20130221644A1 (en) | 2012-02-23 | 2013-02-20 | Airbag with multi-state vent |
US14/379,678 Active 2033-07-27 US9561775B2 (en) | 2012-02-23 | 2013-03-18 | Airbag with multi-state vent |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/379,678 Active 2033-07-27 US9561775B2 (en) | 2012-02-23 | 2013-03-18 | Airbag with multi-state vent |
Country Status (3)
Country | Link |
---|---|
US (2) | US20130221644A1 (en) |
EP (1) | EP2819890B1 (en) |
WO (1) | WO2013126929A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150028571A1 (en) * | 2013-07-26 | 2015-01-29 | Autoliv Development Ab | Airbag Module With an Airbag Exhibiting a Vent Opening Closed in the Folded State by an Arrester Strap and Procedure of its Manufacture |
CN104691489A (en) * | 2013-10-31 | 2015-06-10 | 福特全球技术公司 | Partial low risk deployment vent assembly for an airbag assembly |
US9889937B2 (en) | 2012-03-19 | 2018-02-13 | Amsafe, Inc. | Structure mounted airbag assemblies and associated systems and methods |
US9925950B2 (en) | 2015-04-11 | 2018-03-27 | Amsafe, Inc. | Active airbag vent system |
US9944245B2 (en) | 2015-03-28 | 2018-04-17 | Amsafe, Inc. | Extending pass-through airbag occupant restraint systems, and associated systems and methods |
US10399534B2 (en) * | 2014-11-15 | 2019-09-03 | Key Safety Systems, Inc. | Driver airbag module and bag with passively vented cushion |
US10604259B2 (en) | 2016-01-20 | 2020-03-31 | Amsafe, Inc. | Occupant restraint systems having extending restraints, and associated systems and methods |
US10611331B2 (en) * | 2017-08-31 | 2020-04-07 | Hyundai Mobis Co., Ltd. | Airbag apparatus |
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-
2013
- 2013-02-20 US US13/771,488 patent/US20130221644A1/en not_active Abandoned
- 2013-03-18 US US14/379,678 patent/US9561775B2/en active Active
- 2013-03-18 EP EP13751344.6A patent/EP2819890B1/en active Active
- 2013-03-18 WO PCT/US2013/032804 patent/WO2013126929A1/en active Application Filing
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9889937B2 (en) | 2012-03-19 | 2018-02-13 | Amsafe, Inc. | Structure mounted airbag assemblies and associated systems and methods |
US20150028571A1 (en) * | 2013-07-26 | 2015-01-29 | Autoliv Development Ab | Airbag Module With an Airbag Exhibiting a Vent Opening Closed in the Folded State by an Arrester Strap and Procedure of its Manufacture |
US9227592B2 (en) * | 2013-07-26 | 2016-01-05 | Autoliv Development Ab | Airbag module with an airbag exhibiting a vent opening closed in the folded state by an arrester strap and procedure of its manufacture |
CN104691489A (en) * | 2013-10-31 | 2015-06-10 | 福特全球技术公司 | Partial low risk deployment vent assembly for an airbag assembly |
GB2519869B (en) * | 2013-10-31 | 2017-05-24 | Ford Global Tech Llc | Partial low risk deployment vent assembly for an airbag assembly |
US10399534B2 (en) * | 2014-11-15 | 2019-09-03 | Key Safety Systems, Inc. | Driver airbag module and bag with passively vented cushion |
US9944245B2 (en) | 2015-03-28 | 2018-04-17 | Amsafe, Inc. | Extending pass-through airbag occupant restraint systems, and associated systems and methods |
US9925950B2 (en) | 2015-04-11 | 2018-03-27 | Amsafe, Inc. | Active airbag vent system |
US10604259B2 (en) | 2016-01-20 | 2020-03-31 | Amsafe, Inc. | Occupant restraint systems having extending restraints, and associated systems and methods |
US10611331B2 (en) * | 2017-08-31 | 2020-04-07 | Hyundai Mobis Co., Ltd. | Airbag apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP2819890A1 (en) | 2015-01-07 |
EP2819890A4 (en) | 2015-12-09 |
WO2013126929A1 (en) | 2013-08-29 |
EP2819890B1 (en) | 2018-05-30 |
US9561775B2 (en) | 2017-02-07 |
US20160068132A1 (en) | 2016-03-10 |
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Legal Events
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AS | Assignment |
Owner name: KEY SAFETY SYSTEMS, INC., MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BEATTIE, CALUM;MALLINGER, HEATHER;RASKA, MARY;AND OTHERS;SIGNING DATES FROM 20130514 TO 20130515;REEL/FRAME:030419/0504 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- INCOMPLETE APPLICATION (PRE-EXAMINATION) |
|
AS | Assignment |
Owner name: UBS AG, STAMFORD BRANCH, CONNECTICUT Free format text: PATENT SECURITY AGREEMENT;ASSIGNOR:KEY SAFETY SYSTEMS, INC.;REEL/FRAME:033673/0524 Effective date: 20140829 |
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