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FR2520238A1 - Vehicle passenger inflatable retainer belt - comprises tubular belt with double wound elastic weft threads - Google Patents

Vehicle passenger inflatable retainer belt - comprises tubular belt with double wound elastic weft threads Download PDF

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Publication number
FR2520238A1
FR2520238A1 FR8201037A FR8201037A FR2520238A1 FR 2520238 A1 FR2520238 A1 FR 2520238A1 FR 8201037 A FR8201037 A FR 8201037A FR 8201037 A FR8201037 A FR 8201037A FR 2520238 A1 FR2520238 A1 FR 2520238A1
Authority
FR
France
Prior art keywords
strap
gas generator
tubular
overmolded
belt
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.)
Granted
Application number
FR8201037A
Other languages
French (fr)
Other versions
FR2520238B1 (en
Inventor
Frederic Coussau
Gerard Albert Romann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aerazur EFA SA
Original Assignee
Aerazur EFA SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aerazur EFA SA filed Critical Aerazur EFA SA
Priority to FR8201037A priority Critical patent/FR2520238A1/en
Publication of FR2520238A1 publication Critical patent/FR2520238A1/en
Application granted granted Critical
Publication of FR2520238B1 publication Critical patent/FR2520238B1/fr
Granted legal-status Critical Current

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
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/276—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means to vent the inflation fluid source, e.g. in case of overpressure
    • 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
    • B60R21/18—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags the inflatable member formed as a belt or harness or combined with a belt or harness arrangement
    • 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
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/276—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means to vent the inflation fluid source, e.g. in case of overpressure
    • B60R2021/2765—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means to vent the inflation fluid source, e.g. in case of overpressure comprising means to control the venting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Air Bags (AREA)

Abstract

The inflatable retainer is for use by a vehicle passenger, comprising a flexible casing supplied with gas under pressure by a gas generator. The casing consists of a tubular belt (1) woven from longitudinal chain stitches (3) and double-wound elastic weft threads. One thread holds the belt in the rest position and breaks on inflation, while the other is strong to limit the extension of the weft. One end of the belt can be secured inside a tubular component moulded onto it, and fitting oVer a gas generator secured to the vehicle chassis.

Description

Des recherches sont actuellement entreprises pour munir les hélicoptères ou les véhicules de dispositifs de retenue, sous forme de harnais ou baudriers gonflables qui, en cas de choc, se gonflent dans un laps de temps très court. Ces dispositifs doivent avoir pour rôle primordial d'assurer une bonne rétention de l'utilisateur, puis d'amortir sa course en avant par laminage des gaz enfermés dans l'enveloppe et d'augmenter la zone de répartition des efforts sur le thorax de l'utilisateur grâce à sa grande largeur. Research is currently being undertaken to provide helicopters or vehicles with restraint devices, in the form of inflatable harnesses or harnesses which, in the event of an impact, inflate within a very short period of time. These devices must have the primary role of ensuring good retention of the user, then of damping their forward stroke by rolling the gases enclosed in the envelope and of increasing the zone of distribution of the forces on the thorax of the body. user thanks to its large width.

Comme la plupart des fractures de côtes dans le cas de l'utilisation de dispositifs de retenue classiques à sangle sont provoquées par des forces de cisaillement exercées par les bords de la sangle, il est clair que cette cause de blessures pourrait être considérablement diminuée par l'utilisation d'un système gonflable de grande largeur. Since most rib fractures when using conventional webbing restraints are caused by shear forces exerted by the edges of the webbing, it is clear that this cause of injury could be greatly reduced by the use of a large width inflatable system.

Tandis que les dispositifs classiques actuels, sous forme de harnais ou de baudriers, se limitent à arrêter la course vers l'avant de l'utilisateur, cette course dépendant directement de la manière dont est aJustée la sangle sur le thorax, on a déJà envisagé l'utilisation de dispositifs gonflables constitués principalement d'une enveloppe souple poreuse qui est conditionnée à la largeur d'une sangle classique mais bien plus épaisse lorsqu'elle n'est pas active et qui se déploie lors d'un choc par la poussée des gaz engendrés par un système pyrotechnique ou par un réservoir de gaz sous pression. La partie active forme un cylindre d'un diamètre de l'ordre de 120 mm en fin de gonflage dont la longueur recouvre le thorax dans sa totalité. While current conventional devices, in the form of harnesses or harnesses, are limited to stopping the forward race of the user, this course depending directly on how the strap is adjusted on the chest, we have already considered the use of inflatable devices mainly consisting of a porous flexible envelope which is conditioned to the width of a conventional strap but much thicker when it is not active and which deploys during an impact by the push of the gases generated by a pyrotechnic system or by a pressurized gas tank. The active part forms a cylinder with a diameter of the order of 120 mm at the end of inflation, the length of which covers the entire thorax.

La présente invention a pour but d'améliorer les dispositifs du type ci-dessus de façon à les rendre moins encombrants, plus souples et plus rationnels. A cet effet, le tissu qui forme l'enveloppe extérieure est remplacé par une sangle tubulaire dont la trame constituant les fils transversaux est élastique et qui est de dimension sensiblement identique à celle d'une sangle normale tandis que les fils de channe longitudinaux assurent la tenue mécanique de la sangle. Le fil de trame est un fil spécial élastique à double guipage.  The present invention aims to improve the devices of the above type so as to make them less bulky, more flexible and more rational. For this purpose, the fabric which forms the external envelope is replaced by a tubular strap whose weft constituting the transverse threads is elastic and which is of dimension substantially identical to that of a normal strap while the longitudinal threads provide the mechanical resistance of the strap. The weft thread is a special elastic thread with double covering.

Le premier guipage est constitué d'un fil à casser qui n'a pas ou peu d'allongement et qui confère à la sangle tissée une bonne tenue à l'état de repos. Lors du gonflage. The first covering consists of a breaking wire which has little or no elongation and which gives the woven strap good resistance in the rest state. During inflation.

ce fil de premier guipage casse et libère l'rame élastique du fil de trame qui s'rallonge pour permettre à l'enveloppe d'atteindre un diamètre suffisamment important et nécessaire à une bonne efficacité du système.this first covering yarn breaks and releases the elastic ream from the weft yarn which lengthens to allow the envelope to reach a sufficiently large diameter and necessary for good system efficiency.

Le deuxième guipage est constitué d'un fil plus résistant qui limite l'allongement de l'rame élastique du fil de trame et assure une bonne tenue aux contraintes engendrées par l'effet de pression interne de la tubulure. The second wrapping consists of a more resistant wire which limits the elongation of the elastic ream of the weft yarn and ensures good resistance to the stresses generated by the internal pressure effect of the tubing.

La sangle tubulaire, une fois tissée, est enduite intérieurement d'un produit assurant l'étanchéité et permettant un allongement compatible à l'extension du fil de trame. The tubular strap, once woven, is internally coated with a product ensuring sealing and allowing an elongation compatible with the extension of the weft thread.

On obtient ainsi un cylindre d'un diamètre voulu, étanche ou non à la demande, assurant le maintien d'une pression interne pendant un temps donné.A cylinder of a desired diameter is thus obtained, sealed or not on demand, ensuring the maintenance of an internal pressure for a given time.

Les deux extrémités de la sangle sont surmoulées d'une part en formant un ensemble susceptible de recevoir un système de génération de gaz et d'autre part sur une bouclerie assurant l'interface entre le baudrier et la sangle de liaison.  The two ends of the strap are overmolded on the one hand by forming an assembly capable of receiving a gas generation system and on the other hand on a buckle ensuring the interface between the harness and the connecting strap.

Le surmoulage de la partie recevant le générateur de gaz est de conception particulière puisqu'il est nécessaire, pour une bonne résistance à la contrainte de traction, de la replier sur elle-même autour d'un Jonc afin d'obtenir un blocage des fils longitudinaux
Afin d'assurer l'amortissement de l'avance de l'utilisateur dans le cas d'une sangle élastique étanche, on utilise un dispositif d'échappement fonctionnant par déformation ou écrasement d'un support lorsque le dispositif est sous l'effet d'une forte traction. En se déformant, ce support compressible autorise le déplacement d'un piston qui peut être constitué par le générateur de gaz et ce piston dégage des lumières débouchant dans la chambre sous pression de la sangle tubulaire. Le dégagement des lumières permet l'évacuation du gaz dans un temps compatible à un bon amortissement.The overmolding of the part receiving the gas generator is of particular design since it is necessary, for good resistance to the tensile stress, to fold it back on itself around a rod in order to obtain a blocking of the wires. longitudinal
In order to ensure the absorption of the advance of the user in the case of a waterproof elastic strap, an exhaust device is used which operates by deformation or crushing of a support when the device is under the effect of 'strong traction. By deforming, this compressible support allows the displacement of a piston which may be constituted by the gas generator and this piston releases lights opening into the pressure chamber of the tubular strap. The clearance of the lights allows the evacuation of the gas in a time compatible with good damping.

Pour bien faire comprendre l'invention, on en décrira ci-après plus complètement un exemple d'exécution en référence au dessin schématique annexé, dans lequel :
la figure 1 est une coupe schématique transversale de la sangle tubulaire à l'état de repos
la figure 2 est une coupe correspondante de la sangle à l'état de gonflage
la figure 3 est une coupe longitudinale d'une extrémité de sangle tubulaire ancrée dans une pièce surmoulée qui peut être celle destinée à recevoir ou être un générateur de gaz ; et
la figure 4 est une coupe longitudinale de l'extré- mité de sangle tubulaire adaptée sur un générateur de gaz, la moitié de droite de la figure correspondant à l'état de repos de la sangle tandis que l'extrémité de gauche correspond à son étals de gonflage.To make the invention easier to understand, an embodiment of it will be described below more fully with reference to the appended schematic drawing, in which:
Figure 1 is a schematic cross section of the tubular strap in the rest state
Figure 2 is a corresponding section of the strap in the inflated state
Figure 3 is a longitudinal section of a tubular strap end anchored in an overmolded part which may be that intended to receive or be a gas generator; and
FIG. 4 is a longitudinal section of the end of a tubular strap adapted to a gas generator, the right half of the figure corresponding to the state of rest of the strap while the left end corresponds to its inflation stands.

La sangle tubulaire 1, représentée schématiquement en position de repos sur la figure 1, est aussi représentée schématiquement en position de gonflage sur la figure 2. Sur cette figure 2, on a indiqué en 2 les fils élastiques transversaux à double guipage et en 3 les fils longitudinaux de retenue tandis que le revêtement intérieur étanche et extensible a été indiqué en 4. The tubular strap 1, shown diagrammatically in the rest position in FIG. 1, is also shown diagrammatically in the inflation position in FIG. 2. In this FIG. 2, the elastic transverse yarns with double covering are indicated at 2 and at 3 the longitudinal retaining wires while the waterproof and extensible interior coating has been indicated in 4.

La figure 3 montre l'ancrage d'une extrémité de la sangle tubulaire 1 dans une pièce surmoulée 5 en une matière injectée pouvant être chargée de fibre de verre. Pour le surmoulage, l'extrémité 6 de la sangle tubulaire 1 est repliée autour d'une armature annulaire 7 qui assure le blocage des fils longitudinaux. FIG. 3 shows the anchoring of one end of the tubular strap 1 in an overmolded part 5 in an injected material which can be loaded with glass fiber. For overmolding, the end 6 of the tubular strap 1 is folded around an annular frame 7 which ensures the locking of the longitudinal wires.

Sur la figure 4, on a représenté schématiquement l'adaptation d'une pièce surmoulée 5 sur un générateur de gaz 8 avec interposition d'une couronne 9 en matière compressible ou pièce déformable entre l'arrière du générateur de gaz 8 et une pièce d'appui 10 rendue solidaire de la pièce surmoulée 5. Cette pièce surmoulée présente des lumières d'échappement 11 qui, à l'état de repos représenté par la moitié de droite de la figure 4, se trouvent obturées par le générateur de gaz 8 fixé en 12 au châssis du véhicule.Sous l'action de la pression exercée par les gaz engendrés, la sangle tubulaire se gonfle comme indiqué en 13 ; à cet instant, l'inertie du corps de l'utilisateur, par son déplacement vers l'avant, provoque une traction sur la sangle gonflée 13, de sorte que la pièce surmoulée 5 se trouve tirée le long du générateur de gaz 8 qui forme piston et qui dégage alors les lumières Il en permettant l'échappe- ment rapide mais progressif des gaz et en amortissant au mieux la course de l'utilisateur vers l'avant. On voit que ce déplacement de la pièce surmoulée provoque en 14 1' écrasement de la couronne 9. In Figure 4, there is shown schematically the adaptation of an overmolded part 5 on a gas generator 8 with the interposition of a crown 9 of compressible material or deformable part between the rear of the gas generator 8 and a part d support 10 made integral with the overmolded part 5. This overmolded part has exhaust ports 11 which, in the rest state represented by the right half of FIG. 4, are closed by the gas generator 8 fixed at 12 to the chassis of the vehicle. Under the action of the pressure exerted by the gases generated, the tubular strap inflates as indicated at 13; at this instant, the inertia of the body of the user, by its movement forward, causes traction on the inflated strap 13, so that the overmolded part 5 is pulled along the gas generator 8 which forms piston and which then releases the lights II by allowing the rapid but gradual escape of gases and by damping the user's forward stroke as best as possible. It can be seen that this displacement of the overmolded part causes the crown 9 to be crushed at 14.

On comprendra que l'exemple d'exécution plus particulièrement décrit ci-dessus et représenté au dessin annexé n'a aucun caractère limitatif et qu'on pourrait y apporter diverses modifications ou adjonctions sans s'écarter du cadre de l'invention définie par les revendications annexées0  It will be understood that the embodiment more particularly described above and shown in the appended drawing is in no way limiting and that it would be possible to make various modifications or additions thereto without departing from the scope of the invention defined by the attached claims0

Claims (4)

R E V E N D I C A T I O N S.R E V E N D I C A T I O N S. 1. Dispositif de retenue gonflable pour utilisateur d'hélicoptère ou de véhicule comprenant une enveloppe souple dont la cavité est alimentée en gaz sous pression par un générateur de gaz, caractérisé par le fait que ladite enveloppe est constituée par une sangle tubulaire (1) tissée au moyen de fils de channe longitudinaux (3) et de fils de trame (2) transversaux élastiques à double guipage dont un constitué par des fils à casser assurant la tenue de la sangle au repos et cassant au gonflage tandis que l'autre guipage est constitué par un fil résistant qui limite l'allongement de l'ême élastique des fils de trame. 1. Inflatable restraint device for helicopter or vehicle user comprising a flexible envelope, the cavity of which is supplied with gas under pressure by a gas generator, characterized in that said envelope consists of a woven tubular strap (1) by means of longitudinal channe threads (3) and elastic transverse weft threads (2) with double wrapping, one of which is made of breaking threads ensuring that the strap is held at rest and breaking when inflated while the other wrapping is constituted by a resistant thread which limits the elongation of the elastic core of the weft threads. 2. Dispositif de retenue gonflable selon la revendication 1, caractérisé en outre en ce qu'une extrémité de la sangle tubulaire (1) est ancrée dans une pièce tubulaire surmoulée destinée à coiffer un générateur de gaz fixé au ch ssis du véhicule. 2. Inflatable restraint device according to claim 1, further characterized in that one end of the tubular strap (1) is anchored in an overmolded tubular part intended to cap a gas generator fixed to the chassis of the vehicle. 3. Dispositif de retenue gonflable selon la revendication 2, dans lequel l'extrémité (6) de la sangle tubulaire élastique (1) à surmouler par la pièce tubulaire (5) coiffant le générateur de gaz (8) est repliée autour d'une armature annulaire (7) assurant dans la pièce surmoulée (5) le blocage des fils longitudinaux (3) de la sangle tubulaire. 3. Inflatable restraint device according to claim 2, in which the end (6) of the elastic tubular strap (1) to be overmolded by the tubular part (5) covering the gas generator (8) is folded around a annular frame (7) ensuring in the overmolded part (5) the locking of the longitudinal wires (3) of the tubular strap. 4. Dispositif de retenue gonflable selon la revendication 2, dans lequel une couronne (9) en matière compressible ou déformable sous l'effet d'une forte pression est interposée entre l'arrière du générateur de gaz (8) ou d'un piston fixe et une partie solidaire de la pièce surmoulée (5) en permettant ainsi, lors du gonflage de la sangle, le coulissement de la pièce surmoulée (5) le long du générateur de gaz (8) ou du- piston qui dégage des lumières d'échappement (11) ménagées à travers la paroi de la pièce surmoulée en permettant ainsi l'évacuation rapide mais progressive des gaz de gonflage, ce qui évite que le corps de l'utilisateur rebondisse sur la sangle gonflée en étant projeté vers l'arrière.  4. Inflatable restraint device according to claim 2, in which a crown (9) of compressible or deformable material under the effect of a strong pressure is interposed between the rear of the gas generator (8) or of a piston fixed and an integral part of the overmolded part (5) thus allowing, during inflation of the strap, the sliding of the overmolded part (5) along the gas generator (8) or of the piston which releases lights from '' exhaust (11) formed through the wall of the overmolded part thus allowing rapid but gradual evacuation of the inflation gases, which prevents the body of the user from rebounding on the inflated strap while being projected backwards .
FR8201037A 1982-01-22 1982-01-22 Vehicle passenger inflatable retainer belt - comprises tubular belt with double wound elastic weft threads Granted FR2520238A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8201037A FR2520238A1 (en) 1982-01-22 1982-01-22 Vehicle passenger inflatable retainer belt - comprises tubular belt with double wound elastic weft threads

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8201037A FR2520238A1 (en) 1982-01-22 1982-01-22 Vehicle passenger inflatable retainer belt - comprises tubular belt with double wound elastic weft threads

Publications (2)

Publication Number Publication Date
FR2520238A1 true FR2520238A1 (en) 1983-07-29
FR2520238B1 FR2520238B1 (en) 1984-04-27

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FR8201037A Granted FR2520238A1 (en) 1982-01-22 1982-01-22 Vehicle passenger inflatable retainer belt - comprises tubular belt with double wound elastic weft threads

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5118132A (en) * 1989-12-14 1992-06-02 Takata Corporation Cover of an air bag device
EP0536677A1 (en) * 1991-10-10 1993-04-14 Dynamit Nobel Aktiengesellschaft Safety device for the protection of vehicle occupants against injury in case of accident
US5358270A (en) * 1992-08-31 1994-10-25 Takata Corporation Air bag device
US5431436A (en) * 1993-09-21 1995-07-11 Morton International, Inc. Airbag module
FR2719531A1 (en) * 1994-05-04 1995-11-10 Breed Automotive Tech Inflation device for passenger side air bags.
EP0904993A2 (en) * 1997-09-02 1999-03-31 Takata Corporation Inflatable safety belt device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2080330A5 (en) * 1970-02-21 1971-11-12 Rutzki Edith
FR2200747A5 (en) * 1972-09-21 1974-04-19 Allied Chem
FR2200813A5 (en) * 1972-09-21 1974-04-19 Allied Chem
US3830519A (en) * 1973-01-10 1974-08-20 Allied Chem Fiber reinforced inflatable restraining band for vehicles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2080330A5 (en) * 1970-02-21 1971-11-12 Rutzki Edith
FR2200747A5 (en) * 1972-09-21 1974-04-19 Allied Chem
FR2200813A5 (en) * 1972-09-21 1974-04-19 Allied Chem
US3830519A (en) * 1973-01-10 1974-08-20 Allied Chem Fiber reinforced inflatable restraining band for vehicles

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5118132A (en) * 1989-12-14 1992-06-02 Takata Corporation Cover of an air bag device
EP0536677A1 (en) * 1991-10-10 1993-04-14 Dynamit Nobel Aktiengesellschaft Safety device for the protection of vehicle occupants against injury in case of accident
US5388860A (en) * 1991-10-10 1995-02-14 Dynamit Nobel Aktiengesellschaft Safety device for protecting the passenger of a motor vehicle from injury in a collision
US5358270A (en) * 1992-08-31 1994-10-25 Takata Corporation Air bag device
US5431436A (en) * 1993-09-21 1995-07-11 Morton International, Inc. Airbag module
FR2719531A1 (en) * 1994-05-04 1995-11-10 Breed Automotive Tech Inflation device for passenger side air bags.
EP0904993A2 (en) * 1997-09-02 1999-03-31 Takata Corporation Inflatable safety belt device
EP0904993A3 (en) * 1997-09-02 2000-04-05 Takata Corporation Inflatable safety belt device
EP1273487A2 (en) * 1997-09-02 2003-01-08 Takata Corporation Air belt device
EP1273487A3 (en) * 1997-09-02 2003-05-02 Takata Corporation Air belt device

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