[특허]Hybrid inflator of airbag

Mosa Industrial Corporation

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Hybrid inflator of airbag

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B60R-021/26
미국특허분류(USC)	280/741; 280/736; 280/737
출원번호	US-0686638 (2012-11-27)
등록번호	US-8641091 (2014-02-04)
우선권정보	TW-100143620 A (2011-11-28)
발명자 / 주소	Wang, Teh-Hsin Tsai, Long-Ming Lin, Chia-Jung Lin, Yun-Hsien
출원인 / 주소	Mosa Industrial Corporation
대리인 / 주소	Muncy, Geissler, Olds & Lowe, PLLC
인용정보	피인용 횟수 : 0 인용 특허 : 7

초록
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The present invention discloses a hybrid inflator of an airbag. The hybrid inflator of the airbag includes a main casing, a central channel, a vent tube, a rupture disc, an inner cover group, an igniter group, a first buffering pad, a second buffering pad and a diffuser. The main casing includes a bottom housing and an upper housing. The central channel is fixed with the bottom housing and passed through the upper housing. A convective hole is disposed on the central channel. The vent tube is covered onto the external central channel and has a throttle bore thereon. The first buffering pad is disposed on a bottom of the inter air chamber. The second buffering pad is disposed in the inner air chamber to separate a space for propellant. The diffuser is correspondingly covered and fixed on the main casing.

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1. A hybrid inflator of an airbag, comprising: a main casing, comprising a bottom housing and an upper housing, and the bottom housing having an ignition hole formed on a bottom wall of the bottom housing, and the upper housing being correspondingly fixed at the top of the bottom housing and the upper housing together with the bottom housing forming a complete sealed casing, and a through opening penetrated through a top end wall of the upper housing;a central channel, having a pipe member with a hollow therein and an opening formed at an upper end of the pipe member, and a bottom of the pipe member being correspondingly fixed onto the bottom housing, and the upper end of the pipe member correspondingly passing through the through opening for fixing the upper housing, and a plurality of convective holes being formed on a wall of the central channel;a vent tube, correspondingly sheathed on an external side of the central channel, and having an aluminum foil sticker attached onto an external surface of the vent tube, and a plurality of throttle holes penetrated through the vent tube;a rupture disc, correspondingly sealed and disposed at an upper end of the central channel for preventing a gas outflow from the main casing, and openable from an inner side by a pushing force of a certain degree;an inner cover group, comprising a cushion ring, a cup cover and a support plate, and the cushion ring being correspondingly disposed on an internal circular wall of the bottom housing, and the cup cover having a shape corresponding to a shape of the cushion ring and covered and fixed to a top of the cushion ring and the cup cover and the cup cover and the bottom housing being enclosed into an inner air chamber, and a propellant being disposed in the inner air chamber, and a sheath opening penetrated through the cup cover and correspondingly sheathed on the central channel, and the support plate being correspondingly disposed on the cup cover and abutted between the cup cover and the upper housing;an igniter group, correspondingly fixed to the ignition hole corresponding to the inner air chamber, for producing an ignition airflow after receiving an ignition signal, so as to further drive the propellant to burn;a first buffering pad, laid on the bottom of the inner air chamber;a second buffering pad, correspondingly disposed in the inner air chamber to separate the space for filling the propellant; anda diffuser, correspondingly sheathed and fixed at the main casing, and a space being formed between the diffuser and the main casing for solidifying and depositing a solid residue after the propellant is burned, and the diffuser having a plurality of exhaust holes formed thereon. 2. The hybrid inflator of the airbag according to claim 1, wherein the igniter group comprises an ignition base, an airtight hood, an igniter and a indicator, and the ignition base is fixed to the ignition hole, and the airtight hood being correspondingly covered onto the ignition base, and the igniter is correspondingly disposed in the ignition base and the airtight hood, for producing an ignition airflow after receiving an ignition signal, and the indicator are correspondingly disposed onto the airtight hood for guiding the ignition airflow produced by the igniter towards the propellant. 3. The hybrid inflator of the airbag according to claim 2, wherein the indicator is a hollow casing has a guide hole penetrated through a wall of the indicator. 4. The hybrid inflator of the airbag according to claim 2, wherein the airtight hood is fixed to the ignition base by a welding, and the ignition base is fixed to the ignition hole by the welding. 5. The hybrid inflator of the airbag according to claim 2, wherein the first buffering pad and the second buffering pad are ceramic fiber pads, crotch pads or thermal rubber pad, and the propellant is a nonazide gas generant. 6. The hybrid inflator of the airbag according to claim 5, wherein the second buffering pad is a metal partition. 7. The hybrid inflator of the airbag according to claim 2, wherein the rupture disc comprises a seal cover and a membrane, and the seal cover is fixed to the upper end of the central channel and has a port, and the membrane is correspondingly fixed onto the port of the seal cover by a welding, and the membrane is damaged from an inner side by a pushing force of a certain degree. 8. The hybrid inflator of the airbag according to claim 7, wherein the upper housing has a recessed portion disposed at the top wall of the upper housing for providing a buffering effect during inflation, and the recessed portion comprises a plurality of recessed channels. 9. The hybrid inflator of the airbag according to claim 7, wherein the throttle holes are not aligned evenly with the convective holes on the wall of the central channel. 10. The hybrid inflator of the airbag according to claim 7, wherein the exhaust holes are disposed uniformly at the periphery of the diffuser, and the diffuser has a fixed portion disposed thereon, and the fixed portion is comprised of at least one locking hole. 11. The hybrid inflator of the airbag according to claim 7 wherein the upper housing, the bottom housing and the diffuser are fixed by the welding. 12. The hybrid inflator of the airbag according to claim 7, wherein the diffuser further comprises a filter.

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Hybrid inflator of airbag

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Hybrid inflator of airbag

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이 특허에 인용된 특허 (7)

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