Tablet-breaking initiator for airbag inflator
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60R-021/26
B60R-021/264
출원번호
US-0034287
(2011-02-24)
등록번호
US-8893622
(2014-11-25)
발명자
/ 주소
Jackson, Scott
Jackson, Andrew P.
Larsen, Alan R.
출원인 / 주소
Autoliv ASP, Inc.
대리인 / 주소
Madson IP, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
An igniter for a passenger vehicle safety airbag module includes a housing with apertured walls, gas-generating tablets filling the housing, and, in direct contact with gas-generating tablets, an initiator containing combustible material. A plurality of four malleable flaps of substantially identica
An igniter for a passenger vehicle safety airbag module includes a housing with apertured walls, gas-generating tablets filling the housing, and, in direct contact with gas-generating tablets, an initiator containing combustible material. A plurality of four malleable flaps of substantially identical shape and size are secured about the squib in an upstanding circumscribing array with spaced-apart, opposed lateral edges between adjacent of the flaps interconnected by fluid seals in the form of webbing that is structurally less robust than the flaps. The ends of the flaps remote from the squib curl radially inwardly into a spaced-apart edge-to-edge disposition beyond the combustible material. The webbing and the flaps together enclose an interior space and the combustible material. Pressure from the ignition of the combustible material causes the fluid seals to burst and the flaps to pivot outwardly crushing the gas-generating tablets in the housing.
대표청구항▼
1. An inflator assembly for a passenger vehicle safety airbag module comprising: an initiator with a housing and gas-generating tablets disposed within the housing, the gas-generating tablets being crushable into combustible powder, the initiator further comprising a casing assembly disposed within
1. An inflator assembly for a passenger vehicle safety airbag module comprising: an initiator with a housing and gas-generating tablets disposed within the housing, the gas-generating tablets being crushable into combustible powder, the initiator further comprising a casing assembly disposed within the housing with the gas-generating tablets being external to the casing assembly, the casing assembly having a pre-deployment mode and a deploying mode, the casing assembly comprising: (a) a tubular sidewall having opposed first and second ends while in the pre-deployment mode, the first end of the sidewall being secured about a squib, the sidewall between the second end thereof and the squib circumscribes an interior space for housing a combustible material ignitable by the squib;(b) an endwall secured to and closing the second end of the sidewall; and(c) a groove traversing the endwall and extending beyond the end wall along the sidewall toward the first end thereof, upon activation of the squib the casing assembly transitions from the pre-deployment mode to the deploying mode as pressure from the ignition of the combustible material causes the endwall and the sidewall on opposite sides of the groove to burst therealong creating flaps that pivot outwardly of the interior space about the first end of the sidewall to impact and crush at least a portion of the gas-generating tablets into combustible powder that combusts as a result of the impact. 2. An inflator assembly as recited in claim 1, wherein the groove is formed in the face of the endwall opposite from the interior space and in the face of the sidewall opposite from the interior space. 3. An inflator assembly as recited in claim 1, wherein the sidewall has a circular transverse cross section. 4. An inflator assembly as recited in claim 1, wherein the endwall is substantially planar. 5. An igniter assembly for a passenger vehicle safety airbag module comprising: an initiator having a pre-deployment mode and a deploying mode;a plurality of gas-generating tablets disposed about the initiator, the gas-generating tablets being crushable into combustible powder; andwherein the initiator comprises: (a) a squib remotely operable in the event of a vehicular collision;(b) combustible material ignitable by the squib;(c) a cup-shaped casing having an open end secured about the squib, the squib and the casing thereby together enclosing an interior space wherein the combustible material is housed while in the pre-deployment mode, the casing comprising: (i) a continuous sidewall having opposed first and second ends, the first end of the sidewall corresponding to the open end of the casing; and(ii) an endwall secured to and closing the second end of the sidewall; and(d) a network of frangible regions formed in the casing, individual of the frangible regions extending across the endwall and along the sidewall, upon activation of the squib the initiator transitions from the pre-deployment mode to the deploying mode as pressure from the ignition of the combustible material causes the endwall and the sidewall on opposite sides of each of the frangible regions to burst therealong creating flaps that pivot outwardly of the interior space about the first end of the sidewall to impact and crush at least a portion of the gas-generating tablets into combustible powder that combusts as a result of the impact. 6. An igniter assembly as recited in claim 5, wherein the frangible regions of the network are interconnected. 7. An igniter assembly as recited in claim 5, wherein the frangible regions of the network comprise structurally-weakened portions of the sidewall and of the endwall of the casing. 8. An igniter assembly as recited in claim 7, wherein the structurally-weakened portions of the sidewall and of the endwall of the casing are thinner that the portions of the sidewall and the portions of the endwall adjacent thereto. 9. An igniter assembly as recited in claim 8, wherein the network comprises scorings on the face of the casing opposite from the interior space. 10. An igniter assembly as recited in claim 5, wherein the network comprises: (e) an elongated first relatively thin region in the casing that extends from a first location on the sidewall proximate the first end of the sidewall across the endwall and along the sidewall to a second location on the sidewall distinct from the first location and proximate the first end of the sidewall; and(f) an elongated second relatively thin region in the casing that extends from a third location on the sidewall proximate the first end of the sidewall across the endwall and along the sidewall to a fourth location on the sidewall distinct from the third location and proximate the first end of the sidewall. 11. An igniter assembly as recited in claim 10, wherein the first and second relatively thin regions cross on the endwall of the casing. 12. An igniter for a passenger vehicle safety airbag module, the igniter comprising: (a) a housing with apertured walls;(b) gas-generating tablets disposed within the housing, the gas-generating tablets being crushable into combustible powder;(c) an initiator in direct contact with gas-generating tablets in the housing, the initiator having a pre-deployment mode and a deploying mode and comprising: (i) a squib remotely operable in the event of a vehicular collision;(ii) combustible material ignitable by the squib;(iii) a casing comprising a plurality of malleable flap-like sections secured about the squib in an upstanding circumscribing array with spaced-apart lateral edges between adjacent of the flap-like sections, the ends of the flaps remote from the squib curling radially inwardly into a spaced-apart edge-to-edge disposition beyond the combustible material when the initiator is in the pre-deployment mode; and(iv) fluid seals interconnecting opposed edges of adjacent of the flap-like sections of the casing, the flap-like sections and the seals thereby together enclosing an interior space wherein the combustible material is housed when the initiator is in the pre-deployment mode, the fluid seals being sufficiently structurally less robust than the flap-like sections that upon activation of the squib the initiator transitions from the pre-deployment mode to the deployed mode as pressure from the ignition of the combustible material causes the fluid seals to burst creating flaps to pivot outwardly to impact and crush at least a portion of the gas-generating tablets within the housing into combustible powder that combusts as a result of the impact. 13. An initiator as recited in claim 12, wherein the fluid seals are interconnected. 14. An initiator as recited in claim 12, wherein the fluids seals comprise regions of webbing extending between opposed edges of adjacent of the flap-like sections. 15. An initiator as recited in claim 14, wherein the webbing and the flap-like sections are integrally formed from a single material. 16. An initiator as recited in claim 12, wherein the flap-like sections are substantially identical in shape and size. 17. An initiator as recited in claim 12, wherein the plurality of flap-like sections comprises four flap-like sections. 18. An inflator module of a passenger vehicle safety airbag module having an inflatable airbag, comprising: an igniter having a casing disposed about a squib and combustible material ignitable by the squib, the casing being subdivided into flap-like sections, each flap-like section being attached to the squib and being individually separated into flaps that are outwardly pivotable by the ignition of the combustible material; andgas-generating tablets in direct contact with the exterior of the casing, the gas-generating tablets combust when receiving pulverizing impacts from the flaps of the casing of the igniter. 19. An inflator module as recited in claim 18, wherein the flap-like sections are defined by scoring on the exterior of the casing forming a plurality of intersecting grooves. 20. An inflator module as recited in claim 18, further comprising a housing with apertured walls that encloses the casing and the gas-generating tablets, the apertured walls provide fluid communication of the inflation gas from the interior of the housing to the inflatable airbag.
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이 특허에 인용된 특허 (5)
Rink Karl K. ; Smith Bradley W. ; Green David J. ; Ravenberg Michael J. ; Moore Walter A. ; Pierotti L. John ; Lang Gregory J. ; Miller Harry W., Fuel containment for fluid fueled airbag inflators.
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