Patent ID: 7353824
Filing Date: 2008-04-08
Classification: A62B

Abstract:
1. A control system for a closed circuit rebreather possessing a breathing loop including a CO 2 scrubber and a solenoid operated valve operably connected to a power supply for addition of oxygen from a gas supply, said control system comprising: an electronic controller possessing at least one microprocessor operably connected to the power supply, an indicator operably connected to said electronic controller for receiving signals therefrom, and at least one oxygen sensor operably disposed within the breathing loop of the closed circuit rebreather operably connected to said electronic controller for providing signals thereto; said electronic controller being operably connected to said solenoid operated valve of said closed circuit rebreather for automatic control thereof in addition of oxygen from an oxygen supply to said breathing loop in proportions maintaining, in an operation mode, a programmed oxygen set point in the range of 0.13-0.50 in accordance with signals received from said at least one oxygen sensor; said indicator providing intuitively understood indications in response to signals from said electronic controller in said operation mode relating to expected duration of rebreather use available based upon at least one factor inclusive of: oxygen level, CO whereby operation of the closed circuit rebreather without need for monitoring and interpretation of sensed signal values by the operator is provided; and wherein said electronic controller is programmed to provide at least one signal to said indicator during a maintenance mode resulting in indication of a specific physical action required involving the rebreather.