Abstract: An oxygen supply system providing an adequate oxygen supply mode in an aircraft. A preventive oxygen supply system includes an oxygen source, a preventive oxygen dispensing unit connectable to the oxygen source, a cabin altitude detection device, and a preventive oxygen control device provide at least the following modes: a pre-wear mode providing no oxygen of the oxygen source to the preventive oxygen dispensing unit but normal cabin air; a pre-oxygenation mode providing a predetermined rate of oxygen of the oxygen source to the preventive oxygen dispensing unit sufficient for generating a pre-oxygenation condition of the user; and a decompression mode providing high concentrated oxygen of the oxygen source to the preventive oxygen dispensing unit sufficient for ensuring a minimum oxygenation of the user. The preventive oxygen control device automatically switches to the decompression mode in case a predetermined cabin altitude threshold is detected by the cabin altitude detection device.

Abstract: A device for supplying breathing gas to a user includes: a mask having a breathing opening; and a bag having a bag opening that is connected to the breathing opening in fluid communication, wherein the device further includes an adjustable exhalation valve, wherein the adjustable exhalation valve is in fluid communication with the bag. Thus, the device for supplying breathing gas to a user provides protection against hyperventilation, toxic gases and smoke.

Abstract: An oxygen supply system providing an adequate oxygen supply mode in an aircraft. A preventive oxygen supply system includes an oxygen source, a preventive oxygen dispensing unit connectable to the oxygen source, a cabin altitude detection device, and a preventive oxygen control device provide at least the following modes: a pre-wear mode providing no oxygen of the oxygen source to the preventive oxygen dispensing unit but normal cabin air; a pre-oxygenation mode providing a predetermined rate of oxygen of the oxygen source to the preventive oxygen dispensing unit sufficient for generating a pre-oxygenation condition of the user; and a decompression mode providing high concentrated oxygen of the oxygen source to the preventive oxygen dispensing unit sufficient for ensuring a minimum oxygenation of the user. The preventive oxygen control device automatically switches to the decompression mode in case a predetermined cabin altitude threshold is detected by the cabin altitude detection device.

Abstract: A redundant gas supply or oxygen supply for an aircraft comprising two main lines and a group supply line that is connected to one consumer or to a multitude of consumers. In each case a connecting line connects the respective one main line to the group supply line. Flow limiters and nonreturn valves can be provided in the connecting lines.

Abstract: A redundant gas supply or oxygen supply for an aircraft comprising two main lines and a group supply line that is connected to one consumer or to a multitude of consumers. In each case a connecting line connects the respective one main line to the group supply line. Flow limiters and nonreturn valves can be provided in the connecting lines.