초록 ▼

A protective breathing apparatus comprises a breathing gas supply tube fitted into a protective face mask which has an opening to which the tube extends and which has a peripheral sealing lip adapted to seal the mask around the user\s face. The mouthpiece is attached to the inner end of the tube int

A protective breathing apparatus comprises a breathing gas supply tube fitted into a protective face mask which has an opening to which the tube extends and which has a peripheral sealing lip adapted to seal the mask around the user\s face. The mouthpiece is attached to the inner end of the tube into the mask and it is engageable by the user\s mouth through association with the mouth for breathing. The mask advantageously includes a thickened area on each side of the person\s nose to constrict the nose so that breathing is through the mouth, and the mouthpiece advantageously includes bite nipples which are engageable by the mouth in order to hold the tube in the vicinity of the mouth for breathing. Alternatively, the mouthpiece comprises an end having a plurality of serrations along it which fits into the mouth.

대표청구항 ▼

A protective breathing apparatus, comprising a breathing gas supply tube, a protective face mask having a mask body including an opening through which said tube extends, the portion of said mask body surrounding said opening being an elastic annular diaphragm secured about said tube, a peripheral se

A protective breathing apparatus, comprising a breathing gas supply tube, a protective face mask having a mask body including an opening through which said tube extends, the portion of said mask body surrounding said opening being an elastic annular diaphragm secured about said tube, a peripheral sealing lip and nose engaging portion shaped to engage tightly over and on each side of a user\s nose and to be clamped thereto and to encircle a user\s mouth to seal around a user\s nose and mouth, a mouthpiece connected to the end of said tube which extends through said mask body engageable with a user\s mouth and cooperating with said nose engaging portion to hold the tube in association with a user\s mouth, and bite means connected to said mouthpiece and engageable by a user\s mouth to center said mask body over a user\s mouth and nose.