Patent ID: 6258039
Filing Date: 2001-07-10
Classification: A62B

Abstract:
A respiratory gas consumption monitoring device (20) for a breathing apparatus (1) that reduces the pressure of a respiratory gas (G) supplied from a high pressure gas container (2) via the use of a pressure regulator (4), and supplies the gas to a breathing mask (10) worn by a user, comprising:said respiratory gas consumption monitoring device (20) being connected by a hose (29) which is arranged before said pressure regulator (4) for introduction of the respiratory gas prior to the reduction in pressure from the high pressure gas container (2);and said respiratory gas consumption monitoring device being integrally housed within a housing (28):(a) a primary pressure sensor (21) for detecting the primary pressure in said high pressure gas container (2) before the pressure is reduced by said pressure regulator (4);(b) an environmental pressure sensor (23) and a temperature sensor (22) for the purpose of correcting said primary pressure;(c) an amplifier (24) for amplifying the signal detected by said primary pressure sensor (21);(d) an A/D converter (25) for performing analog/digital conversion of said signal;(e) a data logger (26) for storing said analog/digital converted signals; and(f) a display (27) for displaying the signals or data needed for monitoring the respiratory state of the user of the breathing apparatus.