Inflator filter made of wrapped mesh
AssigneeMorton International, Inc.
InventorsChristopher Hock, Linda M. Rink, Kurt E. Kottke, Paul Philpot
Life of this patent
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Abstract
An improved method for fabricating a filter for use in automotive air bag inflators which comprises forming a hollow cylindrical inner core or combustion screen of filter material and outer filter layers wound outward from the surface of the core so as to be maintained in cylindrical relation thereabout. This invention is specifically directed to an improved filter which does not include a perforated support tube and relies on only the interior combustion screen for support in the final wrapping of the remaining filter structure.
Claims8
A gas generator filter assembly having a multiple layered or stack-up wrapped cylindrical configuration consisting essentially of:
- a hollow cylindrical inner core having at least one open end and internal and external surfaces constructed from at least one wrap of metal wire mesh or expanded metal filter material, and additional wraps of different filter material emanating from and being substantially coextensive with the external surface of said inner core such that said additional wraps are maintained in cylindrical relation about said core without further structural support, said additional wraps of different filter material comprise second, third and fourth wraps of filter material wrapped outward of said inner core, wherein the leading end of said second wrap is in contact with said core, the leading end of said third wrap is in contact with said second wrap, the leading end of said fourth wrap is in contact with both said second and third wraps and wherein the trailing ends of said third and fourth wraps terminate at approximately the same point within said assembly.
A gas generator filter assembly having a multiple layered or stack-up wrapped cylindrical configuration consisting essentially of:
- a hollow cylindrical inner core member having at least one open end and internal and external surfaces constructed from at least one wrap of metal wire mesh or expanded metal filter material, and having additional wraps of different filter material emanating from and being substantially coextensive with the external surface of said inner core member such that said additional wraps are maintained in cylindrical relation about said inner core member without further structural support, said additional wraps of different filter material comprising a three-ply laminate of second, third and fourth wraps filter material concentrically wrapped outward of said inner core member, wherein the leading end of said second wrap is attached to the outer surface of said inner core member and overlapping contact therewith, the leading end of said third wrap is in overlapping contact with said second wrap, the leading end of said fourth wrap is in overlapping contact with said third wrap and is located intermediate said second and third wraps and wherein the trailing ends of said third and fourth wraps terminate at approximately the same point within said assembly.
Dependencies are inferred from the claim text.