IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0642032
(2011-04-15)
|
등록번호 |
US-8720946
(2014-05-13)
|
우선권정보 |
FR-10 52995 (2010-04-20) |
국제출원번호 |
PCT/EP2011/056048
(2011-04-15)
|
§371/§102 date |
20121018
(20121018)
|
국제공개번호 |
WO2011/131589
(2011-10-27)
|
발명자
/ 주소 |
- Prima, Gérald
- Kermarrec, Sébastien
- Lejeune, Maxime
- Clech, Gildas
|
출원인 / 주소 |
|
대리인 / 주소 |
Harness, Dickey & Pierce, P.L.C.
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
12 |
초록
▼
A gas generator has two pyrotechnic charges in two chambers having openings for gas outlet to the outside. Only the first chamber is provided with an igniter for first charge. The chambers are separated by a third wall with a through hole for permanent gas communication, sealed in an initial state b
A gas generator has two pyrotechnic charges in two chambers having openings for gas outlet to the outside. Only the first chamber is provided with an igniter for first charge. The chambers are separated by a third wall with a through hole for permanent gas communication, sealed in an initial state by a cap. The cap is configured to be broken under the pressure of the combustion gases from first charge to keep the hole opened permanently and allow the combustion gases from the first charge to go via the hole kept permanently opened from a first chamber to a second chamber, where these gases induce the combustion of charge. When in an initial state, the cap is configured to go under the pressure of the combustion gases from second charge to the permanent state, in which the cap is broken to keep hole opened permanently and allow the combustion gases from said second charge to go via the hole kept permanently open from the second chamber to the first chamber, where this combustion gases induce the combustion of charge.
대표청구항
▼
1. A gas generator comprising: first and second pyrotechnic charges located respectively in first and second chambers, the first chamber partly delimited by a first outer wall having a first opening for releasing gas outside of the gas generator, the second chamber partly delimited by a second outer
1. A gas generator comprising: first and second pyrotechnic charges located respectively in first and second chambers, the first chamber partly delimited by a first outer wall having a first opening for releasing gas outside of the gas generator, the second chamber partly delimited by a second outer wall having a second opening for releasing gas outside of the gas generator, the first chamber provided with an igniter suitable to be triggered to ignite the first pyrotechnic charge, the second chamber having no igniter, the first chamber abutting the second chamber and being separated from the second chamber by a third wall that partially delimits the first and second chambers,the first opening closed by a first closing device that is suitable to be opened under pressure of combustion gases of the first pyrotechnic charge,the second opening closed by a second closing device that is suitable to be opened under pressure of combustion gases of the second pyrotechnic charge,a third wall including a through hole extending between the first chamber and the second chamber, the through hole being sealed in a first initial state by at least one third cap, the through hole operative to ensure permanent communication of gas directly between the first chamber and the second chamber in a second permanent state, the third cap being configured to be broken under the pressure of the combustion gases of the first pyrotechnic charge such that, when the third cap is in a broken state corresponding to the second permanent state, to permanently keep open the through hole of the third wall in said second permanent state and to let the combustion gases of the first pyrotechnic charge through said through hole permanently open in said second permanent state from the first chamber to the second chamber, where the combustion gases of the first pyrotechnic charge induce the combustion of the second pyrotechnic charge,wherein the third cap seals the through hole when the third cap is in the first initial state, and the third cap is configured to go to the second permanent state under pressure of the combustion gases of the second pyrotechnic charge, and wherein the third cap is broken in the second permanent state to permanently keep the through hole of the third wall open in said second permanent state and to let the combustion gases of the second pyrotechnic charge through said through hole in said second permanent state from the second chamber to the first chamber, such that the combustion gases of the second pyrotechnic charge induce the combustion of the first pyrotechnic charge. 2. The gas generator according to claim 1, further comprising a fourth rigid separation wall having first gas-passage openings, the fourth rigid separation wall disposed between the igniter and the third cap. 3. The gas generator according to claim 1, further comprising a gas filter between the first closing device and the first pyrotechnic charge. 4. The gas generator according to claim 3, wherein the gas generator has means arranged to allow opening of the first closing device before the second closing device by triggering the igniter. 5. The gas generator according to claim 1, further comprising a fourth rigid separation wall having first gas-passage openings between the first pyrotechnic charge and the third cap. 6. The gas generator according to claim 1, further comprising a gas filter disposed between the second closing device and the second pyrotechnic charge. 7. The gas generator according to claim 6, wherein the gas filter surrounds a gas passage, which extends at least to face the through hole, the through hole being connected, when the third cap is broken, to an inside of a gas guiding device, which is located in the gas passage and which extends into the second chamber up to a point located in the second chamber at a distance from the gas filter, the gas guiding device comprising second gas passage openings between an inside of the gas guiding device and an outside of the gas guiding device, the second pyrotechnic charge being outside the gas passage. 8. The gas generator according to claim 7, wherein the gas guiding device is tubular. 9. The gas generator according to claim 1, wherein the first pyrotechnic charge has a first mass, the second pyrotechnic charge has a second mass and distribution of mass between the first and second pyrotechnic charges is greater than or equal to ¼ and less than or equal to 3. 10. The gas generator according to claim 1, wherein the first pyrotechnic charge has a first mass, the second pyrotechnic charge has a second mass and distribution of mass between the first and second pyrotechnic charges is less than or equal to 1. 11. The gas generator according to claim 1, wherein the generator has means arranged to allow ignition of the first pyrotechnic charge before the second pyrotechnic charge by triggering the igniter. 12. The gas generator according to claim 1, further comprising means arranged to allow opening of the third cap before the first closing device by triggering the igniter. 13. The gas generator according to claim 1, further comprising means arranged to allow opening of the third cap before the second closing device by triggering the igniter. 14. A gas generator comprising: first and second pyrotechnic charges located respectively in first and second chambers, the first chamber partly delimited by a first outer wall having a first opening or releasing as outside of the gas generator, the second cha be partly delimited by a second outer wall having a second opening for releasing gas outside of the gas generator, the first chamber provided with an igniter suitable to be triggered to ignite the first pyrotechnic charge, the second chamber having no igniter, the first chamber abutting the second chamber and being separated from the second chamber by a third wall that partially delimits the first and second chambers,the first opening closed by a first closing device that is suitable to be opened under pressure of combustion gases of the first pyrotechnic charge,the second opening closed by a second closing device that is suitable to be opened under pressure of combustion gases of the second pyrotechnic charge,a third wall including a through hole extending between the fist chamber and the second chamber, the through hole being sealed in a first initial state by at least one third cap, the through hole operative to ensure permanent communication of gas directly between the first chamber and the second chamber in a second permanent state, the third cap being configured to be broken under the pressure of the combustion gases of the first pyrotechnic charge such that, when the third cap in a broken state corresponding to the second permanent state, to permanently keep open the through hole of the third wall in said second permanent state and to let the combustion gases of the first pyrotechnic charge through said through hole permanently open in said second permanent state from he first chamber to the second chamber where the combustion gases of the first pyrotechnic charge induce the combustion of the second pyrotechnic charge,wherein the third cap, seals the through hole when the third cap is in the first initial state, and the third cap configured to so to the second permanent state under pressure of the combustion gases of the second pyrotechnic charge, and wherein the third cap is broken in the second permanent state to permanently keep the through hole of the third wall open in said second permanent state and to let the combustion gases of the second pyrotechnic charge through said through hole in said second permanent state from the second chamber to the first chamber, such that the combustion gases of the second pyrotechnic charge induce the combustion of the firsts pyrotechnic charge,wherein between the first closing device and the first pyrotechnic charge is a first gas filter surrounding a first gas passage, which extends between the third cap and at least one fourth rigid separation wall comprising first gas passage openings located facing said first passage, the first pyrotechnic charge being outside the first passage. 15. The gas generator according to claim 14, wherein the gas passage extends along a longitudinal direction going from the first chamber to the second chamber. 16. A gas generator comprising: first and second pyrotechnic charges located respectively in first and second chambers, the first chamber partly delimited by a first outer wall having a first opening for releasing gas outside of the gas generator, the second chamber partly delimited by a second outer wall having a second opening for releasing gas outside of the gas generator, the first chamber provided with an igniter suitable to be triggered to ignite the first pyrotechnic charge the second chamber having igniter, the first chamber abutting the second chamber and being separated from the second chamber by a third wall that partially delimits the first and second chambers,the first opening closed by a first closing device that is suitable to be opened under pressure of combustion gases of the first pyrotechnic charge,the second opening closed by a second closing device that is suitable to be opened under pressure of combustion gases of the second pyrotechnic charge,a third wall including a through hole extending between the first chamber and the second chamber, the through hole being sealed in a first initial state by at least one third cap, the through hole operative to ensure permanent communication of gas directly between the first chamber and the second chamber in a second permanent state, the third cap being configured to be broken under the pressure of the combustion gases of the first pyrotechnic charge such that, when the third cap is in a broken state corresponding to the second permanent state, to permanently keep open the through hole of the third wall in said second permanent state and to let the combustion gases of the first pyrotechnic charge through said through hole permanently open in said second permanent state from the first chamber to the second chamber, where the combustion gases of the first pyrotechnic charge induce the combustion of the second pyrotechnic charge,wherein the third cap seals the through hole when the third cap is in the first initial state, and the third cap is configured to go to the second permanent state under pressure of the combustion gases of the second pyrotechnic charge, and wherein the third cap is broken in the second permanent state to permanently keep the through hole of the third wall open in said second permanent state and to let the combustion gases of the second pyrotechnic charge through said through hole in said second permanent state from the second chamber to the first chamber, such that the combustion gases of the second pyrotechnic charge induce the combustion of the firs pyrotechnic charge, andmeans arranged to allow opening of the first closing device before the third cap by triggering the igniter. 17. A gas generator comprising: first and second pyrotechnic charges located respectively in first and second chambers, the first chamber partly delimited by a first outer wall having a first a opening for releasing gas outside of the gas generator, the second chamber partly delimited by a second outer wall having a second opening for releasing gas outside of the gas generator, the first chamber provided with an igniter suitable to be triggered to ignite the first pyrotechnic charge, the second chamber having no igniter, the first chamber abutting the second chamber and being separated from the second chamber by a third wall that partially delimits the first and second chambers,the first opening closed by a first closing device that is suitable to be opened under pressure of combustion gases of the first pyrotechnic charge,the second opening closed by a second closing device that is suitable to be opened under pressure of combustion gases of the second pyrotechnic charge,a third wall including a through hole extending between the first chamber and the second chamber, the through hole being sealed in a first initial state by at least one third cap, the through hole operative to ensure permanent communication of gas directly between the first chamber and the second chamber in a second permanent state, the third cap being configured to be broken under the pressure of the combustion gases of the first pyrotechnic charge such that, when the third cap is in a broken state corresponding to the second permanent state, to permanently keep open the through hole of the third wall in said second permanent state and to let the combustion gases of the first s pyrotechnic charge through said through hole permanently open in said second permanent state from the first chamber to the second chamber, where the combustion gases of the first pyrotechnic charge induce the combustion of the second pyrotechnic charge,wherein the third cap seals the through hole when the third cap is in the first initial state, and the third cap is configured to go to the second permanent state under pressure of the combustion gases of the second pyrotechnic charge, and wherein the third cap broken in the second permanent state to permanently keep the through hole of the third wall open in said second permanent state and to let the combustion gases of the second pyrotechnic charge through said through hole in said second permanent state from the second chamber to the first chamber, such that the combustion gases of the second pyrotechnic charge induce the combustion of the first pyrotechnic charge,wherein the first closing device is formed by a first cap sealing first opening for gas outlet to the outside and suitable to be broken under pressure of the combustion gases of the first pyrotechnic charge, the second closing device is formed by a second cap sealing the second opening for gas outlet to the outside and suitable to be broken under the combustion gases pressure of the second pyrotechnic charge, the third cap and at least one of the first and second caps made of a single piece.
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