Rebreather Setpoint Controller and Display
First Claim
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.
1 Assignment
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Accused Products
Abstract
An oxygen setpoint controller (SPC) and a user'"'"'s display for a rebreathing apparatus wherein the user exhales oxygen depleted breath into a closed rebreathing loop, the CO2 is scrubbed from the exhaled gases, oxygen is added to the rebreathing loop to maintain the oxygen at a specified partial pressure, and the oxygen enhanced gases in the rebreathing are provided to the user. The SPC is able to detect the failure of any of the oxygen sensors and provide an alarm condition to the user. The SPC further operates to provide dive data such as rate of ascent, time of dive, depth, and PPO2 to the uses, and to store and retain dive data for further review. The SPC further provides numerical dive data to a heads up display (HUD). The HUD further includes a tricolor LED displaying selected analog parameters.
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Citations
35 Claims
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1. A self-contained breathing apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification