Compensated valve for breathing system

Details Compensated valve for breathing system Compensated valve for breathing system

1985-03-13

1986-10-14

Husar, Stephen F.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

137102, 137908, A62B 902

Patent

active

046166467

ABSTRACT:
A combined inhalation/exhalation valve for use on a breathing mask for high altitude flights comprises a housing carried by the mask and connectable to a demand regulator. A one-part diaphragm located in the housing controls gas flow. The diaphragm has a cup whose bottom wall is provided with a radial lip seal cooperating with an exhalation seat. The cup is annular. It defines a tore-shaped chamber subjected to the compensation pressure, e.g. to the pressure which prevails in the exhalation line of the regulator connected to the valve. The bottom wall of the cup is further provided with a lip constituting the movable element of an inhalation valve.

REFERENCES:
patent: 3556122 (1971-01-01), Laerdal
patent: 3799185 (1974-03-01), Milnes et al.
patent: 4428392 (1984-01-01), Jones et al.

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