Patent ID: 8171932
Filing Date: 2012-05-08
Classification: A62B

Abstract:
1. Oxygen breathing device for an aircraft, in particular for oxygen supply to crew member in a cockpit of the aircraft, comprising: a filter unit having an inflow port and an outflow port, the filter unit being adapted to extract nitrogen from an air flow flowing from the inflow port to the outflow port through the filter unit, wherein the filter unit is adapted to receive compressed bleed air via a bleed air supply line from a precompressor stage of a turbine driving the aircraft connected to the inflow port, or directly by a separate electrically driven compressor, a first pressure regulator in the bleed air supply line a first water separator which is arranged in the bleed air supply line in flow direction of the bleed air before the first pressure regulator, a connection port which can be brought in fluid communication with said outflow port of the filter unit and which is adapted to be coupled to at least one oxygen supply mask via an oxygen supply line, wherein: a chemical oxygen generator comprising at least one substance adapted to produce oxygen in a chemical reaction and to provide said oxygen to an outflow port of said oxygen generator, a starter adapted to start said chemical reaction upon receipt of a start signal, preferably an electrical start signal, wherein the outflow port of said chemical oxygen generator is connected to an auxiliary oxygen supply line, a control unit adapted to selectively provide oxygen from the filter unit or the chemical oxygen generator to the at least one oxygen supply mask coupled to the connection port.