Today’s invention is for athletes who want to train under conditions of hyperoxia or for eg mountaineers who need all the help they can get with breathing during an ascent.
It consists of two tubes. One passes pressurised fresh air (or pure oxygen) into the nose and the other actively extracts exhaled air from the lungs via the mouth.
As the athlete begins to breathe in, a sensor activates a small pump which helps suck in extra fresh air and then pass it through two duck-bill valves to the lungs. When an exhalation is sensed, another pump helps suck exhalation out of the lungs.
The sequence of valve and pump operations is shown as 1,2,3,4.