IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0204903
(2001-12-27)
|
우선권정보 |
JP-0396734 (2000-12-27); JP-0396735 (2000-12-27); JP-0396736 (2000-12-27); JP-0396737 (2000-12-27); JP-0109472 (2001-04-09); JP-0109483 (2001-04-09); JP-0109484 (2001-04-09); JP-0109485 (2001-04-09); JP-0177616 () |
국제출원번호 |
PCT//JP01/11574
(2002-08-26)
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§371/§102 date |
20020826
(20020826)
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국제공개번호 |
WO02//05167
(2002-07-04)
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발명자
/ 주소 |
- Katsuda, Nobuyuki
- Nakayasu, Masayuki
- Matsuda, Naoki
- Goto, Yuzo
|
출원인 / 주소 |
- Daicel Chemical Industries, Ltd.
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대리인 / 주소 |
Birch, Stewart, Kolasch &
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인용정보 |
피인용 횟수 :
5 인용 특허 :
11 |
초록
▼
The present invention is an inflator with an improved reliability wherein a charge holder 37 for giving directivity to an detonation wave generated due to combustion of a priming 36 is provided to an igniter 26, thereby promoting rupture of a rupturable plate 19. A cross-shaped notch is applied to a
The present invention is an inflator with an improved reliability wherein a charge holder 37 for giving directivity to an detonation wave generated due to combustion of a priming 36 is provided to an igniter 26, thereby promoting rupture of a rupturable plate 19. A cross-shaped notch is applied to a surface of the rupturable plate 19, and when the rupturable plate 19 receives a rupture pressure from the igniter 26, four portions of the rupturable plate lap so that the outflow of the pressurized medium can be secured and fragments cannot be made. An inflator housing 12 and a diffuser 20 are connected by screwing a male screw portion on an outer surface of the end portion in the inflator housing 12 into a female screw portion on an inner surface of the end portion in the diffuser portion 20. An existing gas cylinder can be used in this method. A diffuser portion 320 is connected in the opening portion side of a housing 312, and a gas discharging port 340 is connected to the diffuser portion 320. The outflow direction of the pressurized medium and the axial directions of the inflator housing 312 and the gas discharging port 340 are coincident with each other at actuation. The diffuser portion 520 is connected in the opening portion side of the inflator housing 512, and the gas discharging port 540 is connected to the diffuser portion 520, and two filter means 400a and 400b are arranged. After actuation, foreign objects included in the pressurized medium can be removed by the filter means 400a and 400b.
대표청구항
▼
1. An inflator, comprising:an inflator housing in which a pressurized medium is charged and one end thereof being provided with an opening portion; a diffuser portion fixed to the opening portion of the inflator housing and provided with a gas discharging hole for discharging the pressurized medium
1. An inflator, comprising:an inflator housing in which a pressurized medium is charged and one end thereof being provided with an opening portion; a diffuser portion fixed to the opening portion of the inflator housing and provided with a gas discharging hole for discharging the pressurized medium flowing from the opening portion to the outside upon actuation; a rupturable plate closing an outflow path for the pressurized medium between the diffuser portion and the opening portion of the inflator housing; rupturing means for the rupturable plate provided in the diffuser portion; and a gas discharging port connected to the gas discharging hole and extended in an axial direction of said inflator housing, wherein an end portion of said gas discharging port is closed, and a circumferential surface of said gas discharging port is provided with an exhaust opening. 2. An inflator according to claim 1, wherein a filter for removing foreign objects in the discharged pressurized medium is provided inside the gas discharging port.3. An inflator according to claim 1, wherein a filter for removing foreign objects in the discharged pressurized medium is provided at the opening portion of the gas discharging port.4. An inflator comprising:an inflator housing in which a pressurized medium is charged and one end thereof being provided with an opening portion; a diffuser portion fixed to the opening portion of the inflator housing and provided with a gas discharging hole for discharging the pressurized medium flowing from the opening portion to the outside upon actuation; a rupturable plate closing an outflow path for the pressurized medium between the diffuser portion and the opening portion of the inflator housing; rupturing means for the rupturable plate provided in the diffuser portion; and a gas discharging port connected to the gas discharging hole and extended in an axial direction of said inflator housing, wherein the gas discharging port comprises a cylindrical member having one end closed and the other end provided with an opening portion, and the pressurized medium flows out from the opening portion. 5. An inflator, comprising:an inflator housing in which a pressurized medium is charged and one end thereof being provided with an opening portion; a diffuser portion fixed to the opening portion of the inflator housing and provided with a gas discharging hole for discharging the pressurized medium flowing from the opening portion to the outside upon actuation; a rupturable plate closing an outflow path for the pressurized medium between the diffuser portion and the opening portion of the inflator housing; rupturing means for the rupturable plate provided in the diffuser portion; and a gas discharging port connected to the gas discharging hole and extended in an axial direction of said inflator housing, wherein an end portion of the gas discharging port is closed and a circumferential surface of said gas discharging port is provided with an exhaust opening, and wherein an outflow amount of the pressurized medium upon actuation is controlled by one of a gas discharging hole and a filter provided at the gas discharging hole. 6. An inflator according to claim 5, wherein the filter is an annular filter made of one layered porous member such as a punched metal, a plain-stitched wire mesh or a similar member or at least two layers of such porous members.7. An inflator, comprising:an inflator housing in which a pressurized medium is charged and one end thereof being provided with an opening portion, a diffuser portion fixed to the opening portion of the inflator housing and provided with a gas discharging hole for discharging the pressurized medium flowing from the opening portion to the outside at actuation; a rupturable plate closing an outflow path for the pressurized medium between the diffuser portion and the opening of the inflator housing; rupturing means for the rupturable plate provided in the diffuser portion; and a gas discharging port connected to the gas discharging hole and extended in an axial direction of said inflator housing, wherein an end portion of said gas discharging port is closed, and a circumferential surface of said gas discharging port is provided with an exhaust opening, wherein the pressurized medium discharged from the gas discharging hole passes the gas discharging port to be discharged from the exhaust opening of the gas discharging port, and an outflow amount of the pressurized medium at actuation is controlled by exhaust opening of the gas discharging port or a filter provided in the gas discharging port. 8. An inflator according to claim 7, wherein, when the inflator is connected to an air bag, the gas discharging port has convex portions continuously in a circumferential direction or at intervals provided on an outer surface from the opening on the side surface to a portion where the air bag is connected.9. An inflator wherein, in connecting the air bag to an inflator according to claim 8, when the gas discharging port is inserted into a cylindrical mouthpiece mounted to an opening portion of the air bag and the mouthpiece and the gas discharging port are connected to each other,a clearance exists between an inner surface of the mouthpiece and an outer surface of an inserted portion of the gas discharging port reaching the convex portion, and a sectional area of the clearance, which area is defined by a difference between a widthwise sectional area in the mouthpiece and a widthwise sectional area in the inserted portion of the gas discharging port reaching the projecting portion thereof, is larger than the total opening area of a outflow hole of a screen arranged at the gas discharging port. 10. An inflator wherein, in connecting the air bag to an inflator according to claim 8, when the gas discharging port is inserted into a cylindrical mouthpiece mounted to an opening portion of the air bag and the mouthpiece and the gas discharging port are connected to each other,a clearance exists between an inner surface of the mouthpiece and an outer surface of an inserted portion of the gas discharging port reaching the convex portion, and a sectional area of the clearance, which area is defined by a difference between a widthwise sectional area in the mouthpiece and a widthwise sectional area in the inserted portion of the gas discharging port reaching the projecting portion thereof, is larger than the total opening area of the gas discharging hole arranged at the diffuser portion. 11. An inflator according to claim 9 or 10, wherein a male screw is provided on the convex portion of the gas discharging port, and a female screw is provided on part of or the entire portion of the mouthpiece, and the mouthpiece and the convex portion of the gas discharging port is connected by screwing.12. An inflator according to claim 9, wherein the width of clearance existing between an inner surface of the mouthpiece and an outer surface of the inserted portion of the gas discharging port reaching the convex portion is in the range of 1 to 5 mm.13. An inflator, comprising:an inflator housing in which a pressurized medium is charged and one end thereof thereby being provided with an opening portion; a diffuser portion fixed to the opening portion of the inflator housing and provided with a gas discharging hole for discharging the pressurized medium flowing from the opening to the outside upon actuation; a rupturable plate closing an outflow path for the pressurized medium between the diffuser portion and the opening of the inflator housing; rupturing means for the rupturable plate provided in the diffuser portion; and a gas discharging port connected to the gas discharging hole and extended in an axial direction of said inflator housing, wherein an end portion of said gas discharging port is closed, and a circumferential surface of said gas discharging port is provided with an exhaust opening, wherein an outflow amount of the pressurized medium at actuation is controlled by the outflow path of the pressurized medium. 14. An inflator comprising:an inflator housing in which a pressurized medium is charged and one end thereby being provided with an opening portion, a diffuser portion fixed to the opening portion of the inflator housing and provided with a gas discharging hole for discharging the pressurized medium flowing from the opening portion to the outside at actuation; a rupturable plate closing an outflow path for the pressurized medium between the diffuser portion and the opening portion of the inflator housing; rupturing means for the rupturable plate provided in the diffuser portion; and a gas discharging port connected to the gas discharging hole and extended in an axial direction of said inflator housing, wherein the gas discharging port has two or more openings only at the side surface, at least two openings are positioned symmetrically in a widthwise direction or positioned similarly thereto, and a screen with a plurality of outflow holes is arranged at the position where the opening is provided inside the gas discharging port and wherein the pressurized medium discharged from the gas discharging hole passes the gas discharging port to be discharged from the exhaust opening of the gas discharging port, and an outflow amount of the pressurized medium at actuation is controlled by the exhaust opening of the gas discharging port or a filter provided in the gas discharging port. 15. An inflator according to claim 14, wherein the screen comprises a cylinder made of one layered porous member such as a punched metal, a plain-stitched wire mesh or the similar member or at least two layered of the porous members.16. An inflator according to claim 14 or 15, wherein the screen is arranged such that its axial direction is coincident with an axial direction of the gas discharging port.17. An inflator according to claim 7 or 13, wherein the pressurized medium discharged from the gas discharging hole passes the gas discharging port to be discharged from the exhaust opening of the gas discharging port.18. An inflator according to claim 1, 5, 7, or 13 wherein said gas discharging port is provided with a convex portion in a circumferential outer portion thereof where an air is connected.19. An inflator according to claim 1, 5, 7, or 13, wherein said rupturable means is provided within said diffuser portion such that an axis of said rupturable means is perpendicular to an axis of said inflator housing.
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