Unitary filter for pyrotechnic airbag inflator

B - Operations – Transporting – 60 – R

Patent

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B60R 21/26 (2006.01) B01D 39/20 (2006.01) B01D 46/24 (2006.01)

Patent

CA 2124275

UNITARY FILTER FOR PYROTECHNIC AIRBAG INFLATOR Abstract of the Disclosure A unitary rigid filter for use in a high tem- perature, high pressure application in a pyrotechnic airbag inflator includes a matrix structure formed of porous carbonaceous foam material coated with silicon material and having a high thermal conductivity coeffi- cient for absorbing heat from the gases generated on ignition of a pyrotechnic material. The porous, car- bonaceous foam has a porosity rating or permeability of approximately 40 ppi to 80 ppi and a thin, sheet-like liner of porous, ceramic paper is mounted on the body of the foam matrix structure for improving operational characteristics.

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