CN109353304A - Gas generator and Aerated safety device - Google Patents

Gas generator and Aerated safety device Download PDF

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Publication number
CN109353304A
CN109353304A CN201811309670.6A CN201811309670A CN109353304A CN 109353304 A CN109353304 A CN 109353304A CN 201811309670 A CN201811309670 A CN 201811309670A CN 109353304 A CN109353304 A CN 109353304A
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CN
China
Prior art keywords
shell
wall
filter
gas generator
gas
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
CN201811309670.6A
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Chinese (zh)
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CN109353304B (en
Inventor
道格拉斯·厄尔·奥弗顿
李俊杰
黄聪
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.)
Yanfeng Automotive Safety Systems Co Ltd
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Yanfeng Automotive Safety Systems Co Ltd
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.)
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Priority to CN201811309670.6A priority Critical patent/CN109353304B/en
Publication of CN109353304A publication Critical patent/CN109353304A/en
Priority to PCT/CN2019/111458 priority patent/WO2020093844A1/en
Application granted granted Critical
Publication of CN109353304B publication Critical patent/CN109353304B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26Inflatable 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
    • B60R21/264Inflatable 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 using instantaneous generation of gas, e.g. pyrotechnic
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26Inflatable 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
    • B60R21/276Inflatable 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

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

Abstract

The present invention relates to a kind of gas generator and including the Aerated safety device of such gas generator, the gas generator includes the shell (1) and setting ventilative filter (2) in the housing for being configured to pressure vessel, the filter at least partially defines gas producing medicinal room (5), the gas producing medicinal (3) that can be ignited is accommodated in gas producing medicinal room, flow channel (6) are formed between the inner wall (11) of shell and the outside wall surface (12) of filter, the shell has exhaust port (7), the exhaust port is arranged in the wall of restriction flow channel of shell.The inner wall of the restriction flow channel of the shell has not flat structure, the not flat structure is configured to: even if the dilatancy of filter at work makes the outside wall surface of filter and the inner wall with not flat structure of shell recline, dead volume is not also generated in flow channel.The functional reliability of gas generator can be improved whereby.

Description

Gas generator and Aerated safety device
Technical field
The present invention relates to a kind of gas generator and a kind of Aerated safety device including such gas generator, Especially air bag.The Aerated safety device is especially applied in a motor vehicle.
Background technique
Air bag is used widely in a motor vehicle.Air bag mainly includes the air bag and use as inflation element In the gas generator for generating gas.Air bag is usually foldedly snugly installed in a motor vehicle, in the emergency of motor vehicle In, such as when colliding or will collide, gas generator is triggered, and includes the production gas in gas generator Medicament, which is ignited and generates gas, is especially nontoxic gas, and gas is usually after filtering out residue by filter It is filled into air bag by the exhaust port of gas generator, so that air bag is unfolded rapidly, is made to play protection to occupant With.Air bag is usually filled within the time of several ms.
After gas producing medicinal is ignited, the gas sharply generated can make the filter of gas generator deform. If the deflection of filter is excessive, the outside wall surface of filter is possible on the inner wall for sticking on the shell of gas generator, So that at least one regional area and exhaust port of the flow channel between the outside wall surface of filter and the inner wall of shell Isolation, at least one described regional area are properly termed as " dead volume ".Dead volume in flow channel not only damages filter A part of filtering function is lost, and the gas output characteristics of gas generator is changed, influences air bag to occupant Defencive function.Therefore gas generator is it could even be possible to explode.
It is a kind of for avoiding the measure of dead volume from being, increase between the outside wall surface of filter and the inner wall of shell Distance, but therefore increase the size of shell and to increase the size of gas generator.With the hair of auto industry Exhibition, gas generator miniaturization is desirable.For gas generator, size is compacter, then its safety coefficient It is higher.The safety coefficient of gas generator can for example use relational expression: safety coefficient=shell maximum pressure-bearing/working inner pressure table Show.When one timing of internal pressure of gas generator at work, the size of shell is compacter, it is meant that the safety system of gas generator Number is higher.
A kind of gas generator is disclosed in patent document CN1440896A comprising filter, it on the filter can be with Equipped with external Round Porous tubular reinforcer.On the one hand, when gas generator works, the outside wall surface of filter is pressed on the reinforcement On the inner wall of part, this compression has an adverse effect to the filtering function of filter, and the reinforcer itself also obviously subtracts The effective filtration area of filter is lacked.On the other hand, the reinforcer is it is possible in gas generator work and shell Inner wall reclines, to form dead volume.
Summary of the invention
It include such the object of the present invention is to provide a kind of gas generator and one kind from the prior art The Aerated safety device of gas generator, wherein improve gas while being kept substantially gas generator compact size The functional reliability of generator.
The purpose is reached by a kind of gas generator, the gas generator include be configured to pressure vessel shell and Ventilative filter in the housing is set, and the filter at least partially defines gas producing medicinal room, in gas producing medicinal room The gas producing medicinal that can be ignited is accommodated, forms flow channel, the shell between the inner wall of shell and the outside wall surface of filter Body has exhaust port, and the exhaust port is arranged in the wall of restriction flow channel of shell, and the restriction of the shell is flowed The inner wall in channel is configured to not flat structure, the not flat structure: even if the dilatancy of filter at work made The outside wall surface of filter and the inner wall with not flat structure of shell recline, and dead volume is not also generated in flow channel.
By the beneficial effect of gas generator of the invention in particular, in that, gas generator work when, flow channel energy The connection that enough and exhaust port keeps clear can not substantially change the size of shell, therefore can be basic at the same time The upper functional reliability for keeping improving gas generator while gas generator compact size.
By a kind of advantageous embodiment of the invention, the not flat structure may include stretching out from the inner wall of shell Protrusion and/or the recess portion being recessed from the inner wall of shell.Here, the not flat structure can only include protrusion, or only include Recess portion, or not only including protrusion but also including recess portion.The protrusion either one it is continuous, wind in and out , protrusion with constant altitude or change in elevation, be also possible to multiple discrete protrusions.Similarly, the recess portion Either a recess portion continuous, winding in and out, with constant depth or varying depth, is also possible to more A discrete recess portion.
By a kind of advantageous embodiment of the invention, the protrusion was configured on the ring week of multiple inner walls in shell , the ring segment for being separated from each other distance and/or the recess configuration at it is on the ring week of multiple inner walls in shell, each other every Open the groove of distance.
In some embodiments, each protrusion may be in approximately the same plane or in multiple and different planes; Each protrusion can be configured to likewise, also can be configured to different;Each protrusion can be equally or disproportionately distributed;Respectively Protrusion can regularly be distributed or randomly be distributed;It is raised that each protrusion can be configured to dotted, linear or planar.
By a kind of advantageous embodiment of the invention, under the undeformed original state of filter, the protrusion patch Lean against outside wall surface in the outside wall surface of filter or with filter separated by a distance.
By a kind of advantageous embodiment of the invention, the shell can be configured to tubular, and the shell includes top Wall, bottom wall and circumferential wall.The cross section of the shell can be circular, oval or other suitable shapes.It is described Shell also can be configured to other shapes, such as elliposoidal.
By a kind of advantageous embodiment of the invention, the shell can be configured to double-body bike.Preferably, described Shell includes the first shell component with bottom wall and the second shell component with roof, and the first shell component opens wide Edge connect with the open edge of the second shell component.
By a kind of advantageous embodiment of the invention, the open edge of the first shell component and the second shell The open edge of body component is welded to connect.As an alternative, sealing thread connection or bonding are also possible.As supplement, The connection of connection and/or the force closure of form locking can also be additionally provided in.
By a kind of advantageous embodiment of the invention, the quantity of the exhaust port is multiple, and each exhaust port Setting is distributed in the circumferential wall of shell.Such as the exhaust port can be set in second shell component.Each exhaust port It can be homogeneously or heterogeneously distributed in the circumferential wall of second shell component.Each exhaust port can be set same flat In face or it is arranged in different planes.Each exhaust port can be set in the identical height of shell or different height On.Each exhaust port can be configured to circular hole, elliptical aperture, square hole, slit or other forms.
By a kind of advantageous embodiment of the invention, the exhaust port is configured to for pacifying with the inflatable of motor vehicle The inflation element of full device connects.It can not only be applied in motor vehicle by gas generator of the invention, such as safety Air bag, inflatable seat belt or Aerated safety vest, they collide in motor vehicle or when other similar emergencies It can play a protective role to occupant;It can also apply in other areas, such as can also apply in amusement facility, aircraft Or in marine vehicle.
It by a kind of advantageous embodiment of the invention, is observed on the axial direction of shell, the exhaust port setting In the central region of shell, the height dimension of the central region is no more than the 4/5 of the height dimension of entire shell, preferably not More than 3/4, such as no more than 2/3,1/2 especially for the height dimension of entire shell or 1/3.In the height gauge of central region The very little height dimension for entire shell 2/3 when, the vertex in the axial direction of central region and shell and the axial direction of bottom point The 1/6 of the height dimension of the respectively entire shell of distance.In the height dimension that the height dimension of central region is entire shell When 1/2, the vertex in the axial direction of central region and shell and the axial distance of bottom point are respectively the height of entire shell The 1/4 of size.
By a kind of advantageous embodiment of the invention, the shell is configured to tubular, and the shell includes roof, bottom Wall and circumferential wall;The shell is configured to double-body bike, and the shell includes having the first shell component of bottom wall and having to push up The open edge of the second shell component of wall, the open edge of the first shell component and the second shell component connects It connects;The not flat structure includes multiple discrete protrusions stretched out inwardly from the open edge of second shell component and/or more Open edge that the inner wall of a discrete circumferential wall from second shell component stretches out and with second shell component every The protrusion and/or the not flat structure of opening distance include the inner wall of multiple discrete circumferential walls in second shell component The groove being arranged on face.
By a kind of advantageous embodiment of the invention, the groove is on the axial direction of the central axis of reference shell Extend or the groove spirally extends with reference to the central axis of shell.Other trends of groove are also feasible.
By a kind of advantageous embodiment of the invention, the filter structure is at hollow cylindrical, the filter Both ends be respectively supported on the inner wall of shell, the inner wall of the filter and the inner wall of shell, which jointly limit, produces gas Medicament chamber.It is also possible that the filter individually limits gas producing medicinal room.The filter also can have other shapes Shape, for example, almost spherical or it is fusoid.
By a kind of advantageous embodiment of the invention, the gas generator may include igniter, the igniting Device is installed in the housing and is extend into gas producing medicinal room.It is also possible that drawing in hull outside to gas producing medicinal Combustion.
The purpose also passes through a kind of Aerated safety device and reaches comprising inflation element and by gas of the invention The air exit of generator, the gas generator is connect with inflation element.
By a kind of advantageous embodiment of the invention, the Aerated safety device can be the safety for motor vehicle Air bag, inflatable seat belt or Aerated safety vest.
In this respect it is to be noted that each technical characteristic in this application can be arbitrarily combined with each other, as long as this group Conjunction is not self-contradictory.All these feasible combinations are all the technology contents that the application records.
Detailed description of the invention
The present invention is preferably explained referring to attached drawing by embodiment below.Schematical Brief Description Of Drawings are as follows:
Fig. 1 and Fig. 2 shows that gas generator at work schematical in the case where not flat structure is indulged respectively Sectional view;
Fig. 3 shows the schematical longitudinal section of the gas generator by one embodiment of the present invention;
Fig. 4 shows the first shell component by the gas generator of Fig. 3 together with the diagrammatic top view of filter;
Fig. 5 shows the perspective view of the first shell component of the shell of the gas generator by Fig. 3 and Fig. 4;And
Fig. 6 and Fig. 7 shows a kind of perspective view of variant schemes of first shell component respectively.
Specific embodiment
For a better understanding of the present invention, first by means of Fig. 1 and Fig. 2 brief description gas generator in no not reef knot Working condition in the case where structure.Fig. 1 and Fig. 2 shows the schematical longitudinal section of gas generator at work respectively.It should Gas generator includes the shell 1 and setting ventilative filter 2 in the housing for being configured to pressure vessel.The shell 1 can To be configured to tubular, including roof, bottom wall and circumferential wall.The shell is configured to double-body bike, and the shell includes having The first shell component 1a of bottom wall and second shell component 1b with roof, the open edge of the first shell component 1a It is airtightly connect with the open edge of the second shell component 1b.It is set to distribution in the circumferential wall of second shell component 1b Set multiple exhaust ports 7.Although only one exhaust port 7 be also it is feasible, it is preferred that it is multiple in the circumferential wall of shell, Exhaust port 7 on sustained height is especially evenly distributedly set in the circumferential wall of second shell component 1b, so as to reality Existing particularly good exhaust.Exhaust port 7 can for example be connect with air bag.
As depicted in figs. 1 and 2, filter 2 can be configured to hollow cylindrical, and the both ends of the filter 2 are propped up respectively On the roof and bottom wall of shell, the inner wall of the filter and the roof of shell and bottom wall jointly limit gas producing medicinal for support Room 5.The gas producing medicinal 3 that can be ignited is accommodated in gas producing medicinal room 5, igniter 4 is mounted in first shell component 1a simultaneously And it extend into gas producing medicinal room 5.Flow channel 6 is formed between the inner wall 11 of shell 1 and the outside wall surface 12 of filter 2, Exhaust port 7 is arranged in the wall of restriction flow channel of shell 1.Gunpowder is widely used at present as gas producing medicinal, energy quilt Igniter is lighted.It is also possible that two kinds or more kinds of components are chemically reacted when contacting with each other or mixing And therefore generate gas, wherein these components dispose with being isolated, and are for example placed in and are in contact with each other in collision of motor-driven vehicles Or in being mixed with each other.This multi-component gas producing medicinal should also be considered as the " gas generant composition in accordance that can be ignited in the sense of the present invention Agent ".
Igniter 4 is once triggered, and will ignite gas producing medicinal 3, and then gas producing medicinal can generate rapidly nontoxic nothing Evil gas.Gas filters clean gas and is discharged to and fills via flow channel 6 and exhaust port 7 under pressure through filter 2 In the inflation element of gas formula safety device.In Fig. 1 with direction arrow schematically show gas from gas producing medicinal room 5, pass through Filter 2 is moved towards via the air-flow that flow channel 6 and exhaust port 7 are discharged.Flow channel 6 is usually an annular space. The gas of generation substantially radially passes through in the circumferential wall of filter 2 from gas producing medicinal room 5.Direction is only used in Fig. 1 Arrow schematically illustrates the trend of the air-flow by one of exhaust port 7.The dilatancy of filter is not retouched in Fig. 1 It states.Fig. 2 schematically describes the possible dilatancy at work of filter 2 with chain-dotted line in side.In practice, it filters It is prominent that drum occurs usually in whole circumference for device 5.When the dilatancy of filter 2 at work is excessive, it is possible to filter 2 Outside wall surface 12 sticks on the inner wall 11 of shell 1, so that flow channel 6 is opened in lower area shown in Fig. 2 with exhaust Mouth 7 is isolated, so that the lower area becomes dead volume, filter 5 loses filtering function in lower area.
Shell 1 can have fixing element 10, such as can be fixed in a motor vehicle by shell, or by inflation element It is fixed on shell.Fixing element 10 for example can be flange or lug.
Fig. 3 shows the schematical longitudinal section of the gas generator by one embodiment of the present invention, and Fig. 4, which is shown, to be pressed The first shell component of the gas generator of Fig. 3 is together with the diagrammatic top view of filter, and Fig. 5 shows the gas by Fig. 3 and Fig. 4 The perspective view of the first shell component of the shell of body generator.Other than the not flat structure for being configured to raised 8a, in its other party Face can be constituted same or likely with the gas generator by Fig. 1 and Fig. 2 by the gas generator of Fig. 3 and Fig. 4.It leads below Illustrate the not flat structure for being configured to raised 8a.4 protrusion 8a are constituted on the open edge of first shell component 1a, they It is spaced each other distance in a circumferential direction and is respectively structured as ring segment.Under the undeformed original state of filter 2, these Ring segment can contact with filter 2 or have gap.As it can be seen that filter 2 expands in gas generator work in Fig. 4 Deformation, so that filter is supported by each protrusion 8a, wherein by the notch 9 between adjacent protrusion 8a, entire flow channel 6 is protected It holds unobstructed, not will form segregate dead volume in flow channel 6.
Fig. 6 shows a kind of perspective view of variant schemes of first shell component 1a.By the first shell component of Fig. 6 and by figure The difference of 5 first shell component is that raised 8a is on the axial direction of first shell component 1a relative to first shell portion The open edge of part is retracted.
Fig. 7 shows the perspective view of another variant schemes of first shell component 1a.Here, flat structure is not configured to multiple On the inner wall of the circumferential wall of housing parts 1a distribution setting, extend on the axial direction of first shell component 1a it is recessed Portion 8b, these recess portions can be evenly distributedly arranged.
In Fig. 5 into embodiment shown in Fig. 7, flat structure does not only include protrusion or only includes recess portion.It is self-evident, Be also by protrusion and the not flat structure that forms of recess portion it is feasible, the circumferential wall of shell can be for example arranged in they alternating with each otherly Inner wall on.
The present invention is described in more details by specific embodiment above.Finally, it is noted that of the invention Above-mentioned specific embodiment is used only for understanding the present invention, without being construed as limiting to protection scope of the present invention.For this field skill For art personnel, modification can be made on the basis of the above embodiments, all such modifications are without departure from protection of the invention Range.

Claims (10)

1. a kind of gas generator, which includes being configured to the shell (1) of pressure vessel and being arranged in the housing Ventilative filter (2), the filter at least partially define gas producing medicinal room (5), and accommodating in gas producing medicinal room can quilt The gas producing medicinal (3) to ignite forms flow channel (6) between the inner wall (11) of shell and the outside wall surface (12) of filter, The shell has exhaust port (7), and the exhaust port is arranged in the wall of restriction flow channel of shell;
It is characterized in that, the inner wall (11) of the restriction flow channel of the shell has not flat structure, the not flat structure structure It causes: even if the dilatancy of filter (2) at work makes the outside wall surface (12) of filter with shell with not flat structure Inner wall (11) recline, also do not generate dead volume in flow channel (6).
2. gas generator according to claim 1, which is characterized in that the not flat structure includes the inner wall from shell The protrusion (8a) of stretching and/or the recess portion (8b) being recessed from the inner wall of shell;
Preferably, raised (8a) is configured to ring segment on the ring week of multiple inner walls in shell, to be separated from each other distance, And/or the recess portion (8b) is configured to groove on the ring week of multiple inner walls in shell, to be separated from each other distance;
Preferably, each ring segment be configured to it is same and be uniformly distributed on ring week and/or each groove be configured to it is same and It is uniformly distributed on ring week;
Preferably, under the undeformed original state of filter (2), the protrusion (8a) sticks on the outside wall surface of filter (12) outside wall surface (12) on or with filter is separated by a distance.
3. gas generator according to any one of claim 1 to 2, which is characterized in that the shell (1) is configured to cylinder Shape, the shell includes roof, bottom wall and circumferential wall;
Preferably, the shell (1) is configured to double-body bike, and the shell (1) includes the first shell component with bottom wall (1a) and second shell component (1b) with roof, the open edge of the first shell component and the second shell portion The open edge of part connects;
Preferably, the open edge welding of the open edge of the first shell component and the second shell component is in succession It connects;
Preferably, the quantity of the exhaust port (7) is multiple, and each exhaust port is distributed in the circumferential wall of shell (1) Setting.
4. gas generator according to any one of claim 1 to 3, which is characterized in that exhaust port (7) construction It is connect at the inflation element for the Aerated safety device with motor vehicle.
5. gas generator according to any one of claim 1 to 4, which is characterized in that the axial direction in shell (1) Upper observation, the exhaust port (7) are arranged in the central region of shell, and the height dimension of the central region is no more than entire The 2/3 of the height dimension of shell.
6. gas generator according to any one of claim 1 to 5, which is characterized in that
The shell (1) is configured to tubular, and the shell includes roof, bottom wall and circumferential wall;
The shell (1) is configured to double-body bike, and the shell includes having the first shell component (1a) of bottom wall and having to push up The second shell component (1b) of wall, the open side at the open edge of the first shell component and the second shell component Edge connection;
The not flat structure include it is multiple it is discrete stretched out inwardly from the open edge of second shell component it is raised or multiple Open spaced from edges that the inner wall of the circumferential wall of discrete slave second shell component stretches out and with second shell component The protrusion of distance and/or the not flat structure include the inner wall of multiple discrete circumferential walls in second shell component The groove of upper setting.
7. gas generator according to any one of claim 1 to 6, which is characterized in that the groove is in reference shell Central axis axial direction on extend or the groove spirally extends with reference to the central axis of shell.
8. gas generator according to any one of claim 1 to 7, which is characterized in that the filter (2) is configured to Hollow cylindrical, the both ends of the filter are respectively supported on the inner wall of shell, the inner wall and shell of the filter The inner wall of body jointly limits gas producing medicinal room (5);And/or
The gas generator includes igniter (4), and the igniter is installed in the housing and extend into gas producing medicinal In room (5).
9. a kind of Aerated safety device comprising inflation element, which is characterized in that it is characterized in that, the Aerated safety Device includes gas generator according to any one of claim 1 to 8, the air exit of the gas generator with fill The connection of gas element.
10. Aerated safety device according to claim 9, which is characterized in that the Aerated safety device is to be used for Air bag, inflatable seat belt or the Aerated safety vest of motor vehicle.
CN201811309670.6A 2018-11-06 2018-11-06 Gas generator and inflatable safety device Active CN109353304B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201811309670.6A CN109353304B (en) 2018-11-06 2018-11-06 Gas generator and inflatable safety device
PCT/CN2019/111458 WO2020093844A1 (en) 2018-11-06 2019-10-16 Gas generator and inflatable safety device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811309670.6A CN109353304B (en) 2018-11-06 2018-11-06 Gas generator and inflatable safety device

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CN109353304A true CN109353304A (en) 2019-02-19
CN109353304B CN109353304B (en) 2024-04-23

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WO2020093844A1 (en) * 2018-11-06 2020-05-14 延锋汽车智能安全系统有限责任公司 Gas generator and inflatable safety device

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CN109927664A (en) * 2019-04-04 2019-06-25 湖北航鹏化学动力科技有限责任公司 A kind of twin-stage type gas generator

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