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US 5,687,713 AGranted
Breathing mask
OwnerErik W. Bahr, .O slashed.ystein Ljungmann +2inventors
InventorsErik W. Bahr, .O slashed.ystein Ljungmann, Nils Kvandal, Vigbj.o slashed.rn Matre
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Abstract
A breathing mask to be placed on a user's head includes a pressure gas container in the form of one or more closed communicating tubes which form a closed or a open ring adapted to encircle the user's face in front of the user's ears, a sealing member preferably being connected in serial arrangement with a pressure reduction valve and an airtight chamber of the mask.
Claims13
A breathing mask, comprising;
- a face piece having a window,
- flexible sealing means operative to seal against a user's face and extending in front of the user's ears to define an airtight chamber,
- a container for pressurized breathing gas,
- and a pressure reduction valve and a release valve for the supply of breathing gas to said airtight chamber,
- said container for pressurized gas comprising a closed tube in the form of a ring adapted to encircle the user's face in front of the user's ears,
- said pressurized gas container being attached to said flexible sealing means at a position entirely within said face piece, and
- said sealing means connected in series with said pressure reduction valve and said airtight chamber of the mask, thus providing automatic inflation of said sealing means on opening of the breathing gas container and through flow to said airtight chamber.
4 more elements
A breathing mask, comprising:
- a face piece having a window;
- flexible sealing means operative to seal against a user's face and extending in front of the user's ears to define an airtight chamber;
- a rearwardly directed support member connected to a circumference of the breathing mask and operative to support said breathing mask against a base surface when placed over the face of the user lying on said base surface;
- said airtight chamber encircling the user's eyes and nose in such a way that the user's eyes and nose become situated within said airtight chamber;
- a pressure gas container for breathing gas;
- said pressure gas container being attached to said face piece;
- and
- a pressure reduction valve and a release valve for the supply of breathing gas to said airtight chamber,
- wherein said pressure reduction valve releases a downward directed airflow that sweeps along both the inside of said window and a part of the user's face around the user's eyes, to cool this part of the user's face and keep said window free from fog.
6 more elements
Dependencies are inferred from the claim text.