A personal breathing system incorporating a phased-dilution demand oxygen regulator (PDDOR) is disclosed. In embodiments, the breathing system includes a pressurized oxygen source and oronasal mask, a dilution valve for supplying ambient air and a demand valve for supplying pure oxygen. The PDDOR senses the mask pressure associated with the start of an inhalation cycle, maintaining pressure to the demand valve through an initial demand phase during which 100% pure oxygen is supplied through the demand valve. Control pressure within the PDDOR drops throughout the initial demand phase; when the pressure drops below a lower threshold the PDDOR main valve is closed, blocking the demand valve and cutting off the oxygen supply. Ambient air is provided to the mask via a dilution valve to preserve flow to the user.
PHASE DILUTION DEMAND OXYGEN REGULATOR (PDDOR) SYSTEM FOR PERSONAL BREATHING
SAUERSTOFFREGLERSYSTEM MIT PHASENVERDÜNNUNGSBEDARF (PDDOR) FÜR PERSÖNLICHE ATMUNG
SYSTÈME DE RÉGULATION DE LA DEMANDE D'OXYGÈNE PAR DILUTION EN PHASE (PDDOR) POUR LA RESPIRATION INDIVIDUELLE
12.02.2025
Patent
Elektronische Ressource
Englisch
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