IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0059652
(2010-01-14)
|
등록번호 |
US-8424908
(2013-04-23)
|
우선권정보 |
JP-2009-006743 (2009-01-15) |
국제출원번호 |
PCT/JP2010/050663
(2010-01-14)
|
§371/§102 date |
20110428
(20110428)
|
국제공개번호 |
WO2010/082683
(2010-07-22)
|
발명자
/ 주소 |
- Kobayashi, Tomoharu
- Matsuda, Naoki
- Fukawatase, Osamu
- Kurata, Tomoko
- Nonoyama, Yuki
- Yamada, Tadashi
- Ozaki, Toru
|
출원인 / 주소 |
- Daicel Chemical Industries, Ltd.
|
대리인 / 주소 |
Birch, Stewart, Kolasch & Birch, LLP
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
18 |
초록
▼
A gas generator, includes: a housing having closure shell, a diffuser shell including a gas discharge ports, and a flange portion; an inner tube member defining a combustion chamber in an outside thereof for accommodating a gas generating agent, the igniter being attached to the closure shell such t
A gas generator, includes: a housing having closure shell, a diffuser shell including a gas discharge ports, and a flange portion; an inner tube member defining a combustion chamber in an outside thereof for accommodating a gas generating agent, the igniter being attached to the closure shell such that the igniter projects inside from a hole formed in the bottom plate of the closure shell,the annular porous member having a plurality of holes which are smaller than the size of the gas generator, defining a space above the combustion chamber,a total opening area (A1) of the gas discharge ports being smaller than a total opening area (A2) of a gas pathway extending from the combustion chamber to the gas discharge ports (A1A2), andthe space and the gas discharge path being communicated with each other by a communicating portion.
대표청구항
▼
1. A gas generator for a restraining device of a vehicle, comprising: a housing formed by a cup-shaped closure shell, a cup-shaped diffuser shell having a plurality of gas discharge ports on a side surface portion thereof, and a flange portion having a hole for fixing the gas generator;a cup-shaped
1. A gas generator for a restraining device of a vehicle, comprising: a housing formed by a cup-shaped closure shell, a cup-shaped diffuser shell having a plurality of gas discharge ports on a side surface portion thereof, and a flange portion having a hole for fixing the gas generator;a cup-shaped inner tube member disposed inside the housing, defining therein an ignition device chamber for accommodating an igniter coaxially with a central axis of the housing, and defining, in an outside thereof, a combustion chamber charged with a gas generating agent;the cup-Shaped inner tube member having a bottom surface located adjacent to a bottom plate side of the diffuser shell, an opening portion located at a bottom plate of the closure shell and a first cutout portion formed at an end portion of the opening portion, for allowing a combustion product generated in the ignition device chamber to pass therethrough;the igniter attached to the closure shell such that the igniter projects inside from a hole formed in the bottom plate of the closure shell;the cup-shaped inner tube member fixed to an igniter attaching portion which comprises a cylindrical portion projecting inwardly, and a passage for a combustion product formed between the cup-shaped inner tube member and the igniter attaching portion to reach the first cutout ventilating portion;the combustion chamber having an outer circumferential surface formed by an outer circumference cylindrical member, an inner circumferential surface formed by the inner tube member, a bottom surface formed by the bottom plate of the closure shell and a top surface formed by an annular porous member provided between the outer circumferential surface and the inner circumferential surface, the annular porous member being provided with a first annular planar portion having a plurality of first holes, and a first annular inside wall surface portion formed on an inner circumference of the first annular planar portion and abutting with the inner tube member;a gas discharge path formed between the outer circumference cylindrical member and a side surface of the diffuser shell,one end of an opening portion of the outer circumference cylindrical member located at the bottom plate of the closure shell, a rim of the other end opening portion of the other circumference cylindrical member having a second cutout portion;the plurality of first holes being smaller than the size of the gas generating agent, and the annular porous member being disposed such that a space is formed between the annular porous member and the bottom plate of the diffuser shell;the space defined by the outer circumference cylindrical member, the bottom plate of the diffuser shell and the annular porous member;the space, along with the second cutout portion of the outer circumference cylindrical member, being communicated with the gas discharge path; anda total opening area of the plurality of gas discharge ports is smaller than a total opening area of a gas pathway extending from the combustion chamber to the gas discharge ports to increase a time period during which the combustion gas is in contact with wall surfaces forming the gas pathway extending from the combustion chamber to the gas discharge ports by increasing a time period during which the combustion gas passes through the gas pathway,wherein no means for cooling and filtering a gas generated by combustion of the gas generating agent is provided other than the annular porous member. 2. The gas generator for a restraining device for a vehicle according to claim 1, wherein the annular porous member has a first annular outside wall surface portion formed on an outer circumference of the first annular planner portion, and the first annular inside wall surface portion is on the same side as the first annular outside wall surface. 3. The gas generator for a restraining device for a vehicle according to claim 1, wherein the annular porous member has a first annular outside wall surface portion formed on an outer circumference of the first annular planner portion, and the first annular inside wall surface portion is formed on a side opposite to the first annular outside wall surface portion. 4. The gas generator for a restraining device for a vehicle according to claim 3, wherein an annular gas collision member for trapping combustion residues is further disposed on the annular porous member in the space,the annular gas collision member has concave and convex surfaces forming a radial gas pathway, and the outside in the radial direction of the gas pathway is sealed at one of the concave and convex surfaces by a second annular outside wall surface portion formed on an outer circumferential portion of the annular gas collision portion, andthe combustion gas of the combustion chamber collides with the annular gas collision member after passing through the holes of the annular porous member, and is discharged to the gas discharge path through the gas pathway that is not sealed. 5. The gas generator for a restraining device for a vehicle according to claim 1, wherein the outer circumference cylindrical member has, in the vicinity of the bottom plate of the diffuser shell, the second cutout portion for communicating the space and the gas discharge path with each other, and the gas discharge ports are formed closer to a side of the closure shell rather than the communication portion. 6. The gas generator for a restraining device for a vehicle according to claim 5, wherein the flange portion extends from the side surface portion of the diffuser shell to the outside in the radial direction and exists on the imaginary straight line connecting the second cutout portion and the gas discharge ports.
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