Importance

Loading Importance Indicators...

Abstract

The respiratory valve face mask herein relates to a structure for use in restoring respiration by providing for a subject of respiratory failure or cardiac arrest a supply of pressurized oxygen enriched air and which permits in the alternative the free passage of ambient air to the subject under atmospheric pressure. The mask comprising the invention herein has a plurality of chin grooves to provide a general face fit for various sizes or lengths of faces with a perimeter overlying the air passages of a face together with appropriate strap members to secure the same about the head of a person and projecting from the inner surface of the mask is a particularly designed air sealing rib encircling the nose and mouth and carried in the mask is a valve structure which permits the face passage of ambient air to the person under atmospheric pressure and into which the input of oxygen or oxygen enriched air under appropriate pressure acts upon a piston to close the valve to ambient air, and further, in connection therewith, is pressure relief to the atmosphere in the event of an excessive build up of the pressure of oxygen or oxygen enriched air within the mask.

Loading the Abstract Image...

First Claim