| 摘要 |
In a breathing apparatus of the kind which fits inside the mouth in the side of the mouth between the teeth and cheek, being comprised of an elongated air-flow tube which conveys respirated air from the front of the mouth to the rear portion of the mouth proximate the molar teeth, an improvement is disclosed which is defined by a longitudinally extending stabilizing fin affixed to the breathing tube. The stabilizing fin is adapted to fit primarily between the gum and cheek and serves to prevent unwanted expulsion of the breathing apparatus from the mouth and further functions in maintaining the positioning of the air openings of the tube relative to the teeth, cheek and lips of the user of the apparatus. |
