Pyrotechnic inflator with composite overwrap
First Claim
1. A pyrotechnic inflator assembly containing a quantity of pyrotechnic material and having an initiator that upon actuation initiates reaction of the pyrotechnic material, the assembly comprising:
- a shell member having an open end, the shell member including a plurality of flow control features for controlling flow of product gas from the shell member;
an end cap joinable with the shell member to at least in part enclose the open end of the shell member to form a subassembly, the subassembly containing the quantity of pyrotechnic material and at least in part defining a combustion chamber wherein at least a portion of the quantity of pyrotechnic material is reactable to form product gas for inflation of an associated airbag cushion and to generate pressure within the combustion chamber; and
an overwrap about at least a portion of the subassembly to form a pyrotechnic inflator assembly that withstands the pressure generated within the combustion chamber upon reaction of the pyrotechnic material, the overwrap comprising a composite of fibers and a resin matrix system.
1 Assignment
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Accused Products
Abstract
A pyrotechnic inflator assembly including a shell member and an end cap joinable with the shell member to form a subassembly. The subassembly containing a quantity of pyrotechnic material and at least in part defining a combustion chamber wherein at least a portion of the quantity of pyrotechnic material is reactable to form product gas for inflation of an associated airbag cushion and to generate pressure within the combustion chamber. The inflator assembly further including an overwrap about at least a portion of the subassembly to form a pyrotechnic inflator assembly that withstands the pressure generated within the combustion chamber upon reaction of the pyrotechnic material.
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Citations
21 Claims
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1. A pyrotechnic inflator assembly containing a quantity of pyrotechnic material and having an initiator that upon actuation initiates reaction of the pyrotechnic material, the assembly comprising:
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a shell member having an open end, the shell member including a plurality of flow control features for controlling flow of product gas from the shell member; an end cap joinable with the shell member to at least in part enclose the open end of the shell member to form a subassembly, the subassembly containing the quantity of pyrotechnic material and at least in part defining a combustion chamber wherein at least a portion of the quantity of pyrotechnic material is reactable to form product gas for inflation of an associated airbag cushion and to generate pressure within the combustion chamber; and an overwrap about at least a portion of the subassembly to form a pyrotechnic inflator assembly that withstands the pressure generated within the combustion chamber upon reaction of the pyrotechnic material, the overwrap comprising a composite of fibers and a resin matrix system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A pyrotechnic inflator assembly comprising:
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a shell member having an open end, the shell member including a plurality of flow control orifices for controlling flow of product gas from the shell member; an end cap joinable with the shell member to at least in part enclose the open end of the shell member to form a subassembly, the subassembly containing a quantity of pyrotechnic material and at least in part defining a combustion chamber wherein the at least a portion of the quantity of pyrotechnic material is reactable to form product gas for inflation of an associated airbag cushion and to generate pressure within the combustion chamber, the subassembly also containing a filter element at least in part disposed between the quantity of pyrotechnic material and the flow control orifices, the end cap at least in part containing an initiator that upon actuation initiates reaction of the pyrotechnic material, the end cap also including mounting provisions for mounting the inflator assembly into an airbag module; and an overwrap about at least a portion of the subassembly to form a pyrotechnic inflator assembly that withstands the pressure generated within the combustion chamber upon reaction of the pyrotechnic material, the overwrap comprising a composite of fibers of one or more of glass and basalt and a resin matrix system; wherein the shell member is incapable of withstanding the pressure generated within the combustion chamber upon reaction of the pyrotechnic material without support provided by the overwrap.
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20. A method of making a pyrotechnic inflator assembly, the method comprising:
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joining a shell member having an open end with an end cap to at least in part enclose the open end of the shell member to form a subassembly, the subassembly containing a quantity of pyrotechnic material and at least in part defining a combustion chamber wherein the at least a portion of the quantity of pyrotechnic material is reactable to form product gas for inflation of an associated airbag cushion and to generate pressure within the combustion chamber; overwrapping the subassembly with a composite of fibers and a resin matrix system; and treating the composite overwrapped subassembly to form a pyrotechnic inflator assembly that withstands the pressure generated within the combustion chamber upon reaction of the pyrotechnic material and wherein the shell member is incapable of withstanding the pressure generated within the combustion chamber upon reaction of the pyrotechnic material without support provided by the composite overwrap. - View Dependent Claims (21)
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Specification