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Rebreather Setpoint Controller and Display

  • US 20070215157A1
  • Filed: 05/02/2005
  • Published: 09/20/2007
  • Est. Priority Date: 04/30/2004
  • Status: Abandoned Application
First Claim
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1. A self-contained breathing apparatus comprising:

  • a rebreather loop further comprising a breathing mouthpiece for allowing a user to breathe, said breathing mouthpiece having an inlet connected through a first one-way valve, and the mouthpiece having an outlet for passing exhaled gas through a second one-way valve;

    an exhalant counterlung connected to the second one-way valve for receiving the exhaled gas;

    a scrubber connected to the exhalant counterlung for receiving the exhaled gas and for removing CO2 from the exhaled gas, and connected through an oxygen injection valve to a first cylinder of compressed gas for receiving O2 enriched gas; and

    an inhalant counterlung connected to the scrubber for receiving the CO2 depleted gas from the scrubber, and connected to a second cylinder of compressed gas for receiving a diluent gas, and connected to the first one-way valve for providing breathable gas to the user;

    an oxygen monitoring system for measuring the 02 partial pressure (PPO2) of the CO2 depleted exhaled gas; and

    an oxygen control system coupled to the oxygen monitoring system for injecting O2 enriched gas from the first cylinder to the inhalant counterlung.

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