WO2009124394A1 - Inflatable bolster - Google Patents
Inflatable bolster Download PDFInfo
- Publication number
- WO2009124394A1 WO2009124394A1 PCT/CA2009/000475 CA2009000475W WO2009124394A1 WO 2009124394 A1 WO2009124394 A1 WO 2009124394A1 CA 2009000475 W CA2009000475 W CA 2009000475W WO 2009124394 A1 WO2009124394 A1 WO 2009124394A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wall
- bolster
- pleats
- extension
- hollow body
- Prior art date
Links
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
-
- 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
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/205—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards
- B60R21/206—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in dashboards in the lower part of dashboards, e.g. for protecting the knees
-
- 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
- B60R2021/0293—Additional pads or cushions in vehicle compartments, e.g. movably mounted
-
- 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
- B60R2021/23169—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for knee protection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
Definitions
- the present invention relates generally to the field of safety devices for vehicles. More particularly, it concerns an inflatable bolster for use in the passenger compartment of a vehicle.
- a conventional bolster is mounted within a passenger compartment and includes a hollow body and an inflator for injecting a pressurized fluid into the hollow body.
- the inflator is activated upon detection of such an event and the bolster is inflated.
- the impact event may be a front, rear or side impact, a rollover, or any other event which is likely to cause a rapid change in the vehicle's momentum and thereby cause the occupant to strike some portion of the vehicle's passenger compartment.
- the fluid released by the inflator into the hollow body serves to inflate the bolster, bringing its outer surface closer to an occupant. By decreasing the distance between the occupant and its outer surface, the bolster can absorb more of the occupant's momentum over a longer period of time, thereby lessening the force experienced.
- Bolsters may be provided as part of an instrument panel, a door panel, roof panel, a head rest, or other interior portion of the vehicle.
- an inflatable bolster 10 including several aspects of a conventional bolster is illustrated for exemplification purposes.
- An inflator 18 is mounted to the bolster 10, which here is shown in an uninflated state.
- the pleats 18 are folded and form a wave-like pattern as shown, for example, in Figure 1A. During inflation, the pleats 18 can unfold and the bolster 10 is able to expand outward.
- bolsters when such bolsters are in their folded, stored position, they can create a hollow sound when an occupant, for example, knocks, scrapes, touches, or otherwise makes contact with the wall facing the passenger compartment.
- a bolster's hollow body can behave somewhat like sound box and that a generally flat occupant facing wall may behave somewhat like a drum skin.
- the occupant facing wall may be deflected inward, towards the opposing wall, and create a popping sound when released.
- the vehicle, and hence the bolsters therewithin vibrates, this can create a rattling sound.
- air holes in the bolster 10 could be another source of unwanted noise.
- United States Patent No. 6,619,689 discloses a bolster having a pair of transverse strengthening ribs which are formed in an inner wall. These strengthening ribs extend inwards of the bolster's hollow body and engage an opposing outer wall. It will be appreciated however that these while ribs strengthen the bolster, they will have little to no effect on the acoustical behavior of the bolster. The strengthening ribs engage the outer wall along two lines which extend across the center of the bolster. There remain, however, two large sections on either side of the ribs which may still create unwanted noise.
- an inflatable bolster comprising a hollow body having a first wall devised to face a mating surface of the vehicle, the first wall having a central area and a circumferential area surrounding the central area, a second wall opposite the first wall and devised to face the passenger compartment, and an air chamber formed between the first and second walls.
- the inflatable bolster also comprises an inflator for injecting a pressurized fluid into the air chamber and thereby inflating the hollow body.
- the inflator is in communication with the hollow body.
- the inflatable bolster also comprises a plurality of concentric extension pleats formed in the first wall.
- the extension pleats extend around a major part of the circumferential area.
- the extension pleats contact the second wall at a plurality of contact points which are distributed across the second wall.
- the plurality of contact points is sufficient in number to at least partially suppress audible vibration of the second wall.
- an inflatable bolster according to the above-mentioned aspect may advantageously at least partially prevent unwanted acoustical effects.
- Figure 1 is a perspective view of an inflatable bolster incorporating several conventional aspects.
- Figure 1 A is a cross-sectional of the prior art bolster taken along line A-A of Figure 1.
- Figure 2 is a perspective view of an inflatable bolster according to a first preferred embodiment of the present invention.
- Figure 2A is a cross-sectional view taken along line B-B of Figure 2.
- Figure 3 is a perspective view of an inflatable bolster according to a second embodiment of the present invention.
- Figures 3A and 3B are perspective views of two variations of the inflatable bolster of Figure 3.
- Figure 3C is a cross-sectional view taken along line C-C of Figures 3, 3A and 3B.
- an inflatable bolster 30 according to a first preferred embodiment of the invention is illustrated.
- the vehicle interior into which the bolster 30 is to be installed has not been shown. It will be appreciated however that the bolster 30 could be installed, or adapted to be installed, in a variety of places within the passenger compartment of a vehicle.
- the bolster 30 comprises a hollow body 32 and an inflator 34 which is in communication therewith.
- the inflator 34 is mounted to the exterior of the hollow body 32.
- the hollow body 32 is preferably molded from a suitable plastic material, such as a thermoplastic. More preferably, the hollow body 32 is made by extrusion blow molding, which is known in the art and will not be discussed further herein.
- the hollow body 32 comprises a first wall 38 and a second wall 40 which is opposite the first wall 38.
- An air chamber 42 is formed between the two opposite walls 18 and 20.
- the hollow body 32 further comprises an attachment means 36 which is provided on the first wall 38.
- the attachment means 36 engage the vehicle's mating surface, such that the first wall 38 is hidden from view, while the second wall 40 faces the passenger compartment and any driver, passengers or otherwise therein.
- the expression mating surface should not be considered in a limiting manner, but rather should be considered to include all manner of structures, such as brackets and the like, to which the bolster 10 may be similarly mounted.
- the inflator 34 as is known in the art, is typically provided as a cartridge, although it will be appreciated that various other types of inflators are within the scope of the present invention.
- the inflator 34 is in fluid communication with the air chamber 42 and able to inject a pressurized fluid, typically a gas, therewithin. When installed, the inflator 34 is linked to various vehicle sensors which detect impact events and the like and are operable to activate the inflator 34 accordingly. A fluid outlet 44 is also provided for releasing the pressurized fluid after it has inflated the hollow body 32.
- a pressurized fluid typically a gas
- the first wall 38 comprises a central area 46 where the inflator 34, the attachment means 36 and the fluid outlet 44 are preferably provided.
- the first wall 38 further comprises a circumferential area 48 which surrounds the central area 46.
- the circumferential area 48 extends from the central area 46, outward to the circumferential edge 50 of hollow body 32 where the first and second walls 38 and 40 meet, although it will be appreciated that various other geometric arrangement are similarly within the scope of the present invention.
- the bolster 30 is also provided a plurality of extension pleats 52 which are arranged concentrically in the circumferential area 48. These extension pleats 52 are operable to unfold during inflation, effectively expanding the circumferential area 48 as the pleats are unfolded, thereby pushing the second wall 40 away from the first wall 38 and the vehicle's mating surface, and into passenger compartment.
- the illustrated embodiment comprises a substantially rectangular bolster 10 and a plurality of concentric pleats 52 which surround completely the central area 46
- various other geometrical arrangements are similarly possible.
- a plurality of pleats 52 could be provided which extend around three of the four sides of the hollow body 32.
- the unpleated side would have a hinge-like effect on the expansion of the hollow body 32 during inflation.
- the second wall 40 would swing away from the first wall 38 while remaining pivoted thereto along the unpleated side.
- various other shaped bolsters and pleat arrangements could similarly be provided wherein the pleats 52 cover a major part of the circumferential area 48.
- the pleats 52 comprise a substantially square wave-like shape formed by lateral sides 54 which separate upper and lower sides 56 and 58. It will be appreciated however that various other shapes of pleats may similarly be provided.
- the pleats 52 are provided with significant tack-off.
- tack-off refers to a portion of a molded hollow body which engages another opposing portion of the same molded hollow body. For clarity, this tack- off has been exaggerated.
- the hollow body 32 is molded such that there is tack-off between the inside of the lower side 56 of the pleats 52 and the inside of the second wall 40.
- the size of the lateral sides 54 i.e. the depth of the pleats 52, can be made longer than the nominal depth of the bolster, i.e. the distance between the first and second walls 38 and 40 over the non-pleated area. In this manner the pleats 52 have the added effect of creating a tension within the first and second walls 38 and 40.
- the depth of penetration off the tack off may also be adjusted in order to influence the retention strength and time of release during deployment of the bolster 30.
- the tack-off forms a plurality of points of contact 60 which are distributed across the circumferential area 48 of the first wall 38 and a corresponding area of the second wall 40.
- the term "contact point” as used herein should not be considered as being limited to the mathematical definition of a "point”, but rather be understood to encompass a relatively small contact area surrounding a central point. It will also be appreciated that a plurality of contact points can be combined so as to form a contact line. Again, this "line” should not be considered as being limited to the mathematical definition of a "line”, but rather be understood to encompass a contact area having a relatively small width which extends longitudinally.
- first and second walls 38 and 40 are bonded at one or more of the points of contact 60, then work must be done to release these walls 38 and 40 from one another during inflation. It will be appreciated however that if, during molding, the lower side 58 of a given pleat 52 is pushed too into the second wall 40, then these two could become permanently bonded. Such bonding could prevent separation during inflation.
- the plurality of contact points 60 formed between the first and second walls 38 and 40 combine to form such a contact line. These contact lines are aligned concentrically as each pleat 52 touches the inside of the second wall.
- the bolster 70 comprises a hollow body 72 which includes first and second opposing walls 78 and 80 and an air chamber 82 formed therebetween.
- the first wall 78 comprises a central area 86 and a circumferential area 88 which surrounds the central area 86.
- a plurality of concentric extension pleats 92 are formed around the circumferential area 86.
- the pleats 92 similarly comprise lateral sides 94 which separate upper and lower sides 96 and 98.
- the lower sides 96 further comprise a protuberance 100 which extends downwards towards the second wall 80 and forms a contact point 102.
- this protuberance 100 is provided along each pleat 92, thereby forming a contact line between each pleat 92 and the inside of the second wall 80.
- the protuberance 100 provides an area of contact which is relatively thinner than that which would be formed had the whole lower side 98 been in contact with the second wall 80. In certain applications, it may be desirable to provide relatively large pleats 92 but acceptable to provide a relatively small engagement with the second wall 80.
- FIGS 3A and 3B variations of the second preferred embodiment are illustrated.
- the pleats 92 comprise the cross-section shown in Figure 3C, but not across the entire length of the pleats 92. Rather, multiple protrusions 100 are provided along the pleats.
- Figure 3A provides plurality of elongated protrusions 100
- Figure 3B provides a plurality of circular protrusions 100.
- the discreet lines or points of contact 102 may be provided at predetermined intervals along the pleats 92 as desired. It will be appreciated that in certain cases, a distributed array of contact points 102 may sufficiently address the acoustical concerns. It will further be appreciated that such an arrangement of contact points 102 will have less of an effect on the flow of pressurized fluid during inflation.
- first and second embodiments are also possible wherein the depth of the pleats 52 is varied and the tack-off between the bottoms side 58 and the second wall 40 is provided in discreet intervals.
- the points of contact serve to at least partially stifle, dampen or otherwise suppress any audible vibration experience by the bolster's occupant facing wall. These points can be spread across the hollow body in order to suppress vibration in those portions which might be susceptible. Although they need not necessary be spread evenly across the entirety of such a susceptible portion, the contact points 60 or 102 are distributed in sufficient number to at least partially suppress audible vibration of the exposed, occupant facing wall. It will be appreciated that this number and distribution will vary according to each individual bolster's design and installation.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112009000826.7T DE112009000826B4 (en) | 2008-04-11 | 2009-04-14 | Inflatable cushion |
US12/937,100 US8544876B2 (en) | 2008-04-11 | 2009-04-14 | Inflatable bolster |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4429408P | 2008-04-11 | 2008-04-11 | |
US61/044,294 | 2008-04-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009124394A1 true WO2009124394A1 (en) | 2009-10-15 |
Family
ID=41161496
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2009/000476 WO2009124395A1 (en) | 2008-04-11 | 2009-04-14 | An inflatable multilayer bolster and method of manufacture |
PCT/CA2009/000507 WO2009124401A1 (en) | 2008-04-11 | 2009-04-14 | Inflatable bolster |
PCT/CA2009/000475 WO2009124394A1 (en) | 2008-04-11 | 2009-04-14 | Inflatable bolster |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2009/000476 WO2009124395A1 (en) | 2008-04-11 | 2009-04-14 | An inflatable multilayer bolster and method of manufacture |
PCT/CA2009/000507 WO2009124401A1 (en) | 2008-04-11 | 2009-04-14 | Inflatable bolster |
Country Status (3)
Country | Link |
---|---|
US (5) | US7980589B2 (en) |
DE (3) | DE112009000826B4 (en) |
WO (3) | WO2009124395A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7980589B2 (en) | 2005-11-17 | 2011-07-19 | Salflex Polymers Ltd. | Inflatable bolster |
US7992895B2 (en) | 2005-11-17 | 2011-08-09 | Salflex Polymers Ltd. | Bolster deployment pattern |
US8231138B2 (en) | 2005-06-03 | 2012-07-31 | Salflex Polymers Ltd. | Active bolster |
US8459689B2 (en) | 2009-12-24 | 2013-06-11 | Salflex Polymers Ltd. | Passenger side active knee bolster |
US8491008B2 (en) | 2010-05-05 | 2013-07-23 | Salflex Polymers Ltd. | Injection molded inflatable active bolster |
US20130270803A1 (en) * | 2010-11-30 | 2013-10-17 | Ashimori Industry Co., Ltd. | Airbag device |
CN103661228A (en) * | 2012-09-25 | 2014-03-26 | 福特全球技术公司 | Active bolster with stepped bladder spacing |
US8931803B2 (en) | 2010-11-09 | 2015-01-13 | Salflex Polymers Ltd. | Active bolster |
US9254808B2 (en) | 2011-02-07 | 2016-02-09 | Salflex Polymers Limited | Active bolster assembly |
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US9022415B2 (en) * | 2011-01-11 | 2015-05-05 | Autoliv Development Ab | Cover for airbag device, and airbag device |
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US8408590B2 (en) | 2011-03-30 | 2013-04-02 | Ford Global Technologies, Llc | Active bolster with internal tear joints |
US8448985B2 (en) | 2011-07-11 | 2013-05-28 | Ford Global Technologies, Llc | Active bolster with double-hinged tether tabs |
US8336908B1 (en) | 2011-08-08 | 2012-12-25 | Ford Global Technologies, Llc | Insert molded TPO chute for automotive air bag system |
US8336910B1 (en) | 2011-10-03 | 2012-12-25 | Ford Global Technologies, Llc | Active bolster with integrated tear seam |
US8414024B1 (en) | 2011-10-17 | 2013-04-09 | Ford Global Technologies, Llc | Blow-molded active side bolster with tear tabs |
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US8573643B1 (en) * | 2012-05-08 | 2013-11-05 | Ford Global Technologies, Llc | Active bolster with gas directing channels |
DE102012011191A1 (en) * | 2012-06-06 | 2013-12-12 | Autoliv Development Ab | Knee protection device for a motor vehicle and motor vehicle with such a knee protection device |
US8544878B1 (en) * | 2012-06-11 | 2013-10-01 | Ford Global Technologies, Llc | Active bolster with cross-connected pleats |
US8454054B1 (en) * | 2012-09-10 | 2013-06-04 | Ford Global Technologies, Llc | Active bolster with vented hermetic seal |
US8720948B2 (en) * | 2012-09-26 | 2014-05-13 | Ford Global Technologies, Llc | Active bolster with protected weld for bladder |
US8973942B1 (en) * | 2013-08-26 | 2015-03-10 | Ford Global Technologies, Llc | Active bolster with integrated vent |
US9156408B1 (en) * | 2014-05-28 | 2015-10-13 | Ford Global Technologies, Llc | Active glove box door with reaction surface catcher |
US9156423B1 (en) | 2014-06-09 | 2015-10-13 | Ford Global Technologies, Llc | Active bolster with active vent formed in attachment bosses |
US9067557B1 (en) * | 2014-07-14 | 2015-06-30 | Ford Global Technologies, Llc | Active bolster with heat-staked reinforcement |
US9156422B1 (en) | 2014-08-18 | 2015-10-13 | Ford Global Technologies, Llc | Active bolster with multiple bladders on single trim piece |
US9180830B1 (en) * | 2014-12-17 | 2015-11-10 | Ford Global Technologies, Llc | Inflatable device for armrest of vehicle door |
US9327668B1 (en) * | 2015-01-28 | 2016-05-03 | Ford Global Technologies, Llc | Corrugated weld seam for active bolster |
US9636888B2 (en) | 2015-02-04 | 2017-05-02 | Ford Global Technologies, Llc | Injection molding of hollow articles |
US9327672B1 (en) * | 2015-03-12 | 2016-05-03 | Ford Global Technologies, Llc | Active bolster with bladder member hot welded to reaction plate |
US9421933B1 (en) | 2015-04-21 | 2016-08-23 | Ford Global Technologies, Llc | Active glove box door with intermediate skeleton member |
US9663058B1 (en) * | 2016-01-27 | 2017-05-30 | Ford Global Technologies, Llc | Deployable plastic knee bolster with off-centered telescoping support chamber |
US9994167B2 (en) * | 2016-05-17 | 2018-06-12 | Ford Global Technologies, Llc | Active vehicle interior trim panel with accordion fold |
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US8231138B2 (en) | 2005-06-03 | 2012-07-31 | Salflex Polymers Ltd. | Active bolster |
US8544880B2 (en) | 2005-06-03 | 2013-10-01 | Salflex Polymers Ltd. | Active bolster |
US10315608B2 (en) | 2005-06-03 | 2019-06-11 | Abc Technologies Inc. | Active bolster |
US9731675B2 (en) | 2005-06-03 | 2017-08-15 | Abc Group Inc. | Active bolster |
US8801032B2 (en) | 2005-06-03 | 2014-08-12 | Salflex Polymers Ltd. | Active bolster |
US9085275B2 (en) | 2005-06-03 | 2015-07-21 | Salflex Polymers Ltd. | Active bolster |
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US8544876B2 (en) | 2008-04-11 | 2013-10-01 | Salflex Polymers Ltd. | Inflatable bolster |
US8459689B2 (en) | 2009-12-24 | 2013-06-11 | Salflex Polymers Ltd. | Passenger side active knee bolster |
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CN103661228A (en) * | 2012-09-25 | 2014-03-26 | 福特全球技术公司 | Active bolster with stepped bladder spacing |
Also Published As
Publication number | Publication date |
---|---|
DE112009000826B4 (en) | 2017-07-27 |
US8388020B2 (en) | 2013-03-05 |
US7980589B2 (en) | 2011-07-19 |
US8827307B2 (en) | 2014-09-09 |
US20120080871A1 (en) | 2012-04-05 |
US20110109064A1 (en) | 2011-05-12 |
DE112009000826T5 (en) | 2011-05-19 |
DE112009000840T5 (en) | 2011-05-26 |
WO2009124401A1 (en) | 2009-10-15 |
US20110115201A1 (en) | 2011-05-19 |
DE112009000840B4 (en) | 2020-12-24 |
US8544876B2 (en) | 2013-10-01 |
DE112009000827T5 (en) | 2011-05-12 |
WO2009124401A8 (en) | 2010-01-21 |
US20110123739A1 (en) | 2011-05-26 |
WO2009124395A1 (en) | 2009-10-15 |
US20090250915A1 (en) | 2009-10-08 |
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