초록 ▼

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 atm

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.

대표청구항 ▼

A respiratory valve face mask structure for use in connection with an appropriate pressurized oxygen and air supply, consisting of a flexible body portion formed to overlie the front portion of a face and the nose and mouth air passages of a subject, an internal flexible rib projecting from the unde

A respiratory valve face mask structure for use in connection with an appropriate pressurized oxygen and air supply, consisting of a flexible body portion formed to overlie the front portion of a face and the nose and mouth air passages of a subject, an internal flexible rib projecting from the underside of said body portion adapted to extend about said nose and mouth air passages of said subject and having sealing engagement with said face, an outward projection of said body portion from said rib forming a chamber, a valve having a central portion disposed through said projecting portion and said chamber a first end portion and a second end portion each extending outwardly of said projecting portion, said first and second end portions and said central portion having a passage therethrough, first air ports disposed longitudinally of said central portion of said housing and communicating said chamber with said passages, said first end portion of said valve housing having second air ports communicating with the atmosphere, said first and portion having a portion thereof forming a first valve seat between said first and second air ports a pressurized oxygen supply and a pressurized air supply connected to said second end portion of said housing, said second end portion of said valve housing forming a second valve seat between said pressurized oxygen supply and pressurized air supply and said first air ports, a valve member slidably disposed within said passage of said housing and being movable to first, second and third positions, means normally urging said valve member to said first position to engage said second valve seat to seal said air ports from said pressurized oxygen and air supply and to admit the passage of ambient air, said urging means yielding to a first predetermined pressure of incoming pressurized air from said air supply bearing against said valve member to said second position for movement of said valve member to engage said first valve seat to seal off the entry of ambient air and pass said pressurized air to said air passages, said urging means yielding further to a second higher degree of pressure of air within said chamber for movement of said member to said third position communicating said second air ports with said passage.