Patent ID: 6817359
Filing Date: 2004-11-16
Classification: A62B,B63C

Abstract:
Self-contained underwater re-breathing apparatus comprising a breathing circuit including:a mouthpiece having a breathing opening, an outlet for exaled gas and an inlet for inhaled gas, the breathing circuit further including at least one variable-volume container incorporated therein and a scrubber for scrubbing CO2 from exaled gas, the scrubber having an inlet and outlet in communication with the mouthpiece outlet and the mouthpiece inlet, respectively, the re-breathing apparatus further comprising:a first breathable gas cylinder in communication with the breathing circuit through a pressure differential control valve, a shut-off valve in the breathing circuit upstream the control valve, an automatic control means comprising sensors for monitoring physical parameters in the breathing circuit, the automatic control means being adapted to close the shut-off valve when abnormal parameters are detected by the sensors, and a second breathable gas cylinder in communication with the breathing circuit through an automatic control valve controlled by the automatic control means; wherein the breathing circuit further comprises an exhaust valve for exhausting exaled gas when the shut-off valve is closed.