Liquid-fueled device to combine the functions of a low pressure switch (LPS), squib, and gas generator
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60R-021/26
H01H-035/34
출원번호
US-0392633
(1995-02-21)
발명자
/ 주소
Rink Karl K. (Liberty UT) Clark Marcus T. (Kaysville UT)
출원인 / 주소
Morton International, Inc. (Chicago IL 02)
인용정보
피인용 횟수 :
23인용 특허 :
0
초록▼
Featured for use with a hybrid air bag inflator containing inert stored gas under high pressure is a liquid fueled construction which combines the functions of an initiator, gas generator, and differential low pressure switch into a single device. Instead of being filled with a mixture of combustibl
Featured for use with a hybrid air bag inflator containing inert stored gas under high pressure is a liquid fueled construction which combines the functions of an initiator, gas generator, and differential low pressure switch into a single device. Instead of being filled with a mixture of combustible gases, the device is filled with a combination of gases and liquids. Alternatively, it makes use of a hybrid squib in conjunction with different combinations of gases and liquids. A pyrotechnic material is used to ignite the mixture regardless of the combination of fuel and oxidant used in the device. A ceramic body is used to house the device. Upon combustion of the mixture, the ceramic body ruptures violently, permitting efficient transfer of the explosive energy to the inert stored gas in the hybrid inflator.
대표청구항▼
A liquid-fueled device to combine the functions of a low pressure switch, squib and gas generator for a compressed gas air bag inflator comprising, first and second diaphragms each of which are electrically conducting, electrically non-conductive spacer means having a first side and a second side, a
A liquid-fueled device to combine the functions of a low pressure switch, squib and gas generator for a compressed gas air bag inflator comprising, first and second diaphragms each of which are electrically conducting, electrically non-conductive spacer means having a first side and a second side, attaching means attaching said first diaphragm and said second diaphragm in opposed and sealing relation to said first and second sides, respectively, of said spacer means thereby forming a hermetically sealed chamber, with said first diaphragm and said second diaphragm being movable toward and away from each other from a predetermined spaced relationship as the pressure of the environment externally of said hermetically sealed chamber increases and decreases relatively to the pressure in said hermetically sealed chamber, a liquid fuel normally stored under a high pressure oxidizing environment in said hermetically sealed chamber, a pyrotechnic initiator contained in said hermetically sealed chamber, said pyrotechnic initiator igniting in response to an electrical current of predetermined level thereto, a pressure monitoring resistor having first and second ends positioned so as to make and break electrical-contact with said first and second diaphragms as said first and second diaphragms are moved toward and away from each other from a predetermined spaced relation, and electrical circuit means to which said pressure monitoring resistor and said pyrotechnic initiator are connected, said electrical circuit means normally having a flow of electrical monitoring current therein which is too low to ignite said pyrotechnic initiator in said hermetically sealed chamber, but having a capability of having produced therein a flow of electrical current at a predetermined level high enough to cause initiation of said pyrotechnic initiator, whereby, with said hermetically sealed chamber pressurized to a predetermined reference level, in atmospheric environment conditions the pressure in said chamber is higher than atmospheric pressure and said first and second diaphragms are caused to move away from each other and thereby break the electrical contact of said pressure monitoring resistor and cause a change of resistance in said electrical circuit means, whereby with the pressure of the environment external to said hermetically sealed chamber higher by a predetermined amount than said predetermined reference level in said chamber, said first and second diaphragms are caused to move toward each other and cause said pressure monitoring resistor to make electrical contact with said diaphragms and cause a change of resistance in said electrical circuit means, whereby, if the seal of said hermetically sealed chamber fails, the resulting equalization of the chamber pressure and the pressure of the environment external to said chamber causes said first diaphragm and said second diaphragm to move away from each other and break the electrical contact of said pressure monitoring resistor and cause a change in the resistance of said electrical circuit means, and whereby with a flow of a large electrical current through said pyrotechnic initiator, that is, an electrical current at a level high enough to cause initiation thereof, said pyrotechnic initiator is initiated and ignites said liquid fuel in said hermetically sealed chamber.
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이 특허를 인용한 특허 (23)
Rink Karl K. ; Green David J. ; Hepworth Michael, Acetylene-based airbag inflator.
Ebner, Johannes; Kapfelsperger, Thomas, Combustion chamber comprising an opening device for a compressed gas tank of a hybrid inflator, hybrid inflator, airbag module, vehicle safety system and method of discharging fluid from an inflator.
Jenkins Jeffrey A. ; Wiers John W. ; Ellsworth Norman A. ; Buchanan William R. ; Good Stanley B. ; Slack Timothy D., Method for assembling a compressed air bag inflator.
Renfroe Donald (Knoxville TN) Ludeke Steven L. (Knoxville TN) Rose James (Knoxville TN) Bilbrey David A. (Crossville TN), Sliding piston pressure sensing device.
Green David J. ; Young Anthony M. ; Sutherland Glade G. ; Monk David B. ; Woodbury Mark B., Ultra low cost inflator device and method of manufacturing such.
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