Respiratory apparatus

Details Respiratory apparatus Respiratory apparatus

A - Human Necessities

61

B

137/1.52

A61B 7/00 (2006.01) A62B 19/00 (2006.01)

Patent

CA 1054480

A B S T R A C T A filter-type self-rescue apparatus includes downstream of its filter with respect to inhalation gas flow a heat exchanger comprised of a duct containing means of low thermal conductivity. The means has interstices through which the inhalation gas flows and may be in the form of wires, chips, screens, granules, balls, or tubes. These may be made of plastics. They can also be made of a non-porous material, such as a glass or a ceramic material.

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