Obturating element, gas generator provided with the latter and method for manufacturing same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60R-021/274
B60R-021/268
F17C-005/06
B21D-022/20
B23K-011/00
출원번호
US-0648520
(2013-11-29)
등록번호
US-9493138
(2016-11-15)
우선권정보
FR-12 61522 (2012-11-30)
국제출원번호
PCT/EP2013/075165
(2013-11-29)
국제공개번호
WO2014/083180
(2014-06-05)
발명자
/ 주소
Chauvin, Aurélie
Le Gall, Dominique
출원인 / 주소
AUTOLIV DEVELOPMENT AB
대리인 / 주소
Olson, Stephen T.
인용정보
피인용 횟수 :
0인용 특허 :
15
초록▼
A metal obturating element is capable of being resistance-welded to the outer side of an edge of a hole of a metal wall of a pressurized gas reservoir of a gas generator, including on a first side, a portion dimensioned for covering the hole and having an end intended to be inserted into the hole, a
A metal obturating element is capable of being resistance-welded to the outer side of an edge of a hole of a metal wall of a pressurized gas reservoir of a gas generator, including on a first side, a portion dimensioned for covering the hole and having an end intended to be inserted into the hole, and a portion for connecting the portion to the peripheral edge, having a surface tilted rearwards relatively to the end and around the portion, this surface intended to be welded to the outer side of the edge of the hole. The element is formed with a deep-drawn part. The tilted surface forms around the central portion an angle greater than or equal to 50° and less than or equal to 80° relatively to the axis. The part includes in a second side located opposite to the first side another surface tilted rearwards relatively to the end and this by at least one angle greater than or equal to 10° and less than or equal to 80° relatively to the axis.
대표청구항▼
1. A metal obturating element capable of being resistance-welded to the outer side of a first peripheral edge of a hole of a metal wall of a pressurized gas reservoir of a gas generator, the obturating element comprising: on a first side, from a central geometrical axis of the element towards a seco
1. A metal obturating element capable of being resistance-welded to the outer side of a first peripheral edge of a hole of a metal wall of a pressurized gas reservoir of a gas generator, the obturating element comprising: on a first side, from a central geometrical axis of the element towards a second peripheral edge of the element: a first central portion dimensioned in order to cover the hole and having a front end intended to be at least partly inserted into the hole,a second portion for connecting the first central portion to the second peripheral edge, the second connecting portion, having on the first side, a surface tilted rearwards relatively to the front end of the first central portion and around the first central portion, this tilted surface being welded directly to the outer side of the first edge of the hole of the metal wall of the pressurized gas reservoir, in order to obturate the hole,wherein the metal obturating element is a deep-drawn part formed of a metal sheet,wherein the tilted surface of the second connecting portion in the first side is tilted around the first central portion by at least one first angle greater than or equal to 50° and less than or equal to 80° relatively to the central geometrical axis,wherein the metal obturating element includes a second side located opposite to the first side, another tilted surface tilted rearwards relatively to the front end of the first central portion and at least one second angle greater than or equal to 10° and less than or equal to 80° relatively to the central geometrical axis. 2. The metal obturating element according to claim 1, wherein at least one of the tilted surface of the second connecting portion on the first side and the other tilted surface on the second side is substantially conical around the central geometrical axis. 3. The metal obturating element according to claim 1, wherein at least one of the tilted surface on the first side and the other tilted surface on the second side is dome-shaped. 4. The metal obturating element according to claim 1, wherein at least one of the first angle and the at least one second angle increases from the first central portion towards the second peripheral edge. 5. The metal obturating element according to claim 1, wherein at least one of the first angle and the second angle is greater than or equal to 55°. 6. The metal obturating element according to claim 1, wherein at least one of the first angle and the second angle is greater than or equal to 60°. 7. The metal obturating element according to claim 1, wherein at least one of the first angle and the second angle is less than or equal to 75°. 8. The metal obturating element according to claim 1, wherein at least one of the first angle and the second angle is less than or equal to 70°. 9. The metal obturating element according to claim 1, wherein the other tilted surface of the second side delimits a recess surrounded by the second peripheral edge. 10. The metal obturating element according to claim 1, wherein the tilted surface of the first side extends both on the second connecting portion and on the first central portion. 11. The metal obturating element according to claim 1, wherein the other tilted surface of the second side is of a shape mating the tilted surface of the first side. 12. The metal obturating element according to claim 1, wherein the first central portion and the second connecting portion are in one piece. 13. The metal obturating element according to claim 1 in combination with a gas generator, the gas generator including at least one pressurized gas reservoir having at least one metal wall in which is found at least one hole delimited by a first edge, the first edge of the hole being obturated by an obturating element welded to the first edge of the wall, wherein the front end of the first central portion of the obturating element is inserted into the hole, the first central portion covering the hole,a surface for welding to the first edge of the hole of the metal wall of the pressurized gas reservoir being present on the first side in said tilted surface of the second connecting portion of the obturating element, andthe second peripheral edge of the obturating element protruding above the wall. 14. The gas generator according to claim 13, wherein the wall is curved. 15. A method for manufacturing a gas generator according to claim 13, the method comprising: during a first step for manufacturing the obturating element, a metal part is deep-drawn in order to form said obturating element, the tilted surface of which of the second connecting portion on the first side forms the first angle greater than or equal to 50° and less than or equal to 80° relatively to the central geometrical axis and the other surface of which, on a second side located opposite to the first side, is tilted rearwards relatively to the front end of the first portion by at least one second angle greater than or equal to 10° and less than or equal to 80° relatively to the central geometrical axis, andduring a second step for assembling the gas generator, said tilted surface of the second connecting portion located on the first side of the obturating element is resistance-welded to an the outer side of the first edge of the hole of the metal wall of the gas reservoir, in order to obturate the hole. 16. The manufacturing method according to claim 15, wherein during said second step for assembling the gas generator, at least the gas reservoir of the gas generator is filled with pressurized gas through the hole of the metal wall of the gas reservoir and said tilted surface of the second connecting portion located on the first side of the obturating element is resistance-welded to the outer side of the first edge of the hole of the metal wall of the gas reservoir, in order to obturate the hole. 17. The metal obturating element according to claim 1, wherein the metal obturating element is discoidal. 18. The metal obturating element according to claim 1, wherein the first and second sides are substantially parallel. 19. A metal obturating element capable of being resistance-welded to an outer side of a first edge of a hold of a metal wall of a pressurized gas reservoir of a gas generator, the metal obturating element comprising: on a first side, from a central geometrical axis of the element towards a second peripheral edge of the element: a first central portion dimensioned in order to cover the hole and having a front end intended to be at least partly inserted into the hole,a second portion for connecting the first central portion to the second peripheral edge, the second connecting portion, having on the first side, a surface tilted rearwards relatively to the front end of the first central portion and around the first central portion, this tilted surface being intended to be welded to the outer side of the first edge of the hole of the metal wall of the pressurized gas reservoir, in order to obturate the hole,wherein the tilted surface of the second connecting portion in the first side is tilted around the first central portion by at least one first angle greater than or equal to 50° and less than or equal to 80° relatively to the central geometrical axis,wherein the metal obturating element includes a second side located opposite to the first side, another tilted surface tilted rearwards relatively to the front end of the first central portion and this by at least one second angle greater than or equal to 10° and less than or equal to 80° relatively to the central geometrical axis,wherein the metal obturating element has a fiber structure oriented parallel to at least one of the tilted surface of the first side and the other tilted surface of the second side. 20. A gas generator comprising: a pressurized gas reservoir having a metal wall with a hole; anda metal obturating element resistance welded to an edge of the hole to close the hole, the metal obturating element including first and second sides extending from a central geometrical axis to a peripheral edge, a central portion having a front end and a first tilted surface between the central portion and the peripheral edge, the front end at least partially extending into the hole, the first tilted surface rearwardly tilting relative to the front end and around the central portion and welded directly to an outer side of an edge of the hole to obturate the hole,wherein the metal obturating element is discoidal. 21. The gas generator of claim 20, wherein the second side includes a second tilted surface tilted rearwards relatively to the front end of the central portion, and wherein the metal obturating element is discoidal and the first and second sides are substantially parallel to one another. 22. The gas generator according to claim 21, wherein the second tilted surface is tilted rearwards relatively to the central geometrical axis. 23. The gas generator according to claim 20, wherein the tilted surface is tilted around the first central portion by at least one first angle greater than or equal to 50° and less than or equal to 80° relatively to the central geometrical axis. 24. The gas generator according to claim 20, wherein the metal obturating element is formed from a metal sheet.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (15)
Basten, Silvan, Airbag module for a motor vehicle.
Horton, Mark; Ritter, Kimberly; McLeod, II, William Francis; Kelley, Michael Eugene; Dennis, Michael K.; Townsend, Richard Mead, Opening device for a cold gas inflator.
Marsaud Benoit,FRX ; Perotto Christian,FRX ; Duvacquier Daniel,FRX ; Kozyreff Michel,FRX, Pyrotechnic gas generator for inflatable air-bag of a motor vehicle.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.