Respiratory valve face mask structure

DETAILED DESCRIPTION The invention herein comprises a respiratory valve equipped oxygen mask readily adapted to be positioned air tight onto the face of a subject for the injection of oxygen enriched air to a subject suffering from respiratory failure or cardiac arrest such as in connection with the apparatus described in my pending application Ser.
No.
895,733 filed Apr.
5, 1978 entitled Cardiac Pulmonary Resuscitation Apparatus.
To have effective use of the injection of oxygen enriched air into a subject there must be the cooperative relationship of a valve equipped mask readily positioned to be air tight, to suitably fit various sized faces and have a valve structure which permits free passage of ambient air under atmospheric pressure and which embodies means for simultaneously sealing off the passage of ambient air during the application of oxygen enriched air to the subject.
More specifically stated, it is an object of this invention to provide a flexible face mask having an elongated chin engaging structure with cheek flaps and an internal rib to provide an air tight fit about the air passages of a subject and which will accommodate various sized faces and integral therewith is a pressure operated switch valve which closes off ambient air when pressurized oxygen or oxygen enriched air is injected into the air passages of the subject and coupled with said valve is a relief structure to relieve an excessive build up of the pressure of oxygen or oxygen enriched air.
The above and like objects and advantages of the invention will be set forth in the following description made in connection with the accompanying drawing in which like reference characters refer to similar parts through the several views thereof.