Patent ID: 9119977
Filing Date: 2015-09-01
Classification: A62B

Abstract:
1. An oxygen breathing device for providing oxygen to passengers or crew of an aircraft, the device comprising: an oxygen source for providing pressurized oxygen, a valve connected to the oxygen source via a pressure line, a control unit for controlling said valve, at least one nozzle for dispensing the oxygen passing through said valve, a common housing and an ambient pressure sensor integrated into the common housing of the breathing device and being adapted for transmitting pressure signals to the control unit, a measuring chamber having a housing adapted for use within a cabin of the aircraft for determining the mass flow rate of oxygen passing through said nozzle, the measuring chamber comprising the control unit being connected to the temperature sensor and the second pressure sensor of the measurement chamber in a wired or wireless manner and adapted to receive temperature-representative signals from the temperature sensor, pressure-representative signals from the pressure sensor, or both, and wherein the control unit is adapted to calculate the mass flow rate of oxygen passing through the measurement chamber and comprises a data storage unit adapted for writing calibration parameters to and reading said calibration parameters from said data storage unit; and a starting unit for releasing the pressurized oxygen from the oxygen source to the pressure line, wherein the starting unit is electrically actuated via the control unit if a passenger cabin drop is detected by the ambient pressure sensor.