Moisture and heat exchange device for an oxygen self-contained b

Surgery – Respiratory method or device – Inhaled gas heated or humidified by exhaled gas

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Details

12820226, 12820326, 12820417, A62B 1808

Patent

active

047717700

ABSTRACT:
A moisture and heat exchange device for a regeneration type oxygen self-cained breathing apparatus comprises a casing having pipes of which one pipe is connected to a facepiece of the apparatus and the other pipe is connected to a regenerating cartridge of the apparatus. The casing houses a multiple-layer package of alternating hydrophilic and hydrophobic washers, disposed coaxially with the casing. The hydrophilic washers of the multiple-layer package are made in the form of nets of a fibrous material impregnated with a hygroscopic substance. The hydrophobic washers of the multiple-layer package are made of a non-woven bulk web having a linear density which is lower than the linear density of the material of the hydrophilic washers. Two air-distribution pressure screens are provided at the end faces of the multiple-layer package to engage the hydrophobic washers.

REFERENCES:
patent: 3650269 (1972-03-01), Curtis
patent: 3747598 (1973-07-01), Cowans
patent: 3920009 (1975-11-01), Olsen
patent: 4090513 (1978-05-01), Togawa
patent: 4168706 (1979-09-01), Lovell
patent: 4201206 (1980-05-01), Kuehn et al.
patent: 4300547 (1981-11-01), Pasternack
patent: 4484938 (1984-11-01), Okamoto

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