Surgery – Respiratory method or device – Inhaled gas heated or humidified by exhaled gas
Patent
1985-03-04
1986-11-04
Recla, Henry J.
Surgery
Respiratory method or device
Inhaled gas heated or humidified by exhaled gas
12820417, A62B 700
Patent
active
046205373
ABSTRACT:
Described briefly, according to a typical embodiment of the present invention, a breathing mask is provided which has the intake air heater and heat and moisture exchange media located below the nose and situated for minimum exposure to heat transfer to the exterior. The mounting thereof is somewhat cantilevered from the mask, to minimize direct heat transfer to the exterior. Electric heating element means are provided and supplied from an energy pack mounted in the mask itself at a relatively low level. Some of the inhaled air passes through a first filter and moisture collecting medium to the mouth and/or nose of the individual wearing the mask. All inhaled air passes through a heat exchanger and a second filter and moisture exchanger. A valve is provided so that all air exhaled during normal respiration passes through both of the moisture exchangers. A second valve is provided in the wall of the mask to permit exhalation of any air exceeding that which can get through both of the exchangers during strenuous exercise and unusually high rates of respiration.
REFERENCES:
patent: 2610038 (1952-09-01), Phillips
patent: 4136691 (1979-01-01), Ebeling et al.
patent: 4150671 (1979-04-01), Tiger
patent: 4200094 (1980-04-01), Gedeon et al.
patent: 4245631 (1981-01-01), Wilkinson et al.
patent: 4318398 (1982-03-01), Oetjen et al.
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