In a preferred embodiment, methods and systems for the control of the breathing gas supply from a pressure-leading supply conduit to one or more breathing masks of an oxygen emergency supply device in a passenger aircraft include an on/off valve arranged between the supply conduit and the one or more breathing masks. The valve can be blocked or released to control air supply based upon monitoring mass flow to the breathing masks. The valve, for example, is actuated to an open position until the error between the actual mass flow and a desired mass flow exceeds a maximal error value, whereupon the valve is actuated to a closed position until the error between the actual mass flow and the desired mass flow exceeds a minimal error value whereupon the valve is actuated to the open position and the mass flow monitoring cycle is repeated.

A method of supplying oxygen to an oxygen mask for an aircraft includes detecting, with at least one sensor and during a first time period, a first blood-oxygen saturation level at a first altitude. The method may also include detecting, with the at least one sensor and during a second time period, a second blood-oxygen saturation level at a second altitude that is different from the first altitude. The method may include determining a minimum flow rate of a gas that includes oxygen for the second altitude such that the second blood-oxygen saturation level at least matches the first blood-oxygen saturation level at the same altitude.

An aircraft emergency oxygen supply system includes: at least one passenger oxygen mask; a compartment for housing the at least one passenger oxygen mask; and at least one oxygen hose. E each of the at least one passenger oxygen mask is coupled to a respective oxygen hose for supplying a gas comprising oxygen to the respective oxygen mask; at least one fixing clip. Each of the at least one fixing clip comprises a lanyard fixing portion and at least one C-shaped oxygen hose fixing portion for releasably holding one or more oxygen hoses. For each of the at least one fixing clip, the aircraft emergency oxygen supply system comprises a lanyard having a first end, which is fixed at the compartment, and an opposing second end, which is fixed to the lanyard fixing portion of the respective fixing clip.

A monitoring system (100″) is for aeronautical personnel (99), such as aircraft operators, pilots, co-pilots or passengers of airplanes or aircraft, such as aircraft or helicopters of civil or military aviation, passenger aircraft in scheduled or charter traffic, in particular also ultra-fast aircraft. The monitoring system includes a sensor system (60) for a measurement-based monitoring of the gas concentration. The operation of the monitoring system (100″) can be configured by an external input/output unit (450) or an external output unit (460).

A mask system includes a headphone part having two ear cups and an elastic headband bearing the ear cups, an oxygen mask part having an oxygen mask arranged pivotably on the headband, and a spectacles part having protective spectacles arranged pivotably on the headband. The oxygen mask part can make the oxygen mask, with headband mounted on a head, move into a usage setting and a rest setting. The oxygen mask, in the usage setting, covers a mouth and nose of a user and, in the rest setting, lies at least partially above the headband mounted on a head. The spectacles part can make the protective spectacles, with headband mounted on the head, pivot into a usage setting and a rest setting. The protective spectacles, in the usage setting, cover the eyes of a user and, in the rest setting, lie at least partially above the headband.

Gas mixture used for ventilation of passengers and crew in emergency situations. Depending on the density altitude, it has 7±5% CO2 at 15,000 ft flying altitude increasing to 17±5% CO2 at 30,000 ft flying altitude. The carbon dioxide improves the bioavailability of oxygen in the body. The gas mixture is produced by additive dosage of CO2 to either pure O2 or to a gas mixture having a fraction of N2 and a fraction of O2. The method for ensuring good ventilation in case of loss of cabin pressure, or generally in case of hyperventilation, involves making the gas mixture above available via respiration masks. The use of such a gas mixture also for ensuring good ventilation of people with limited mobility, if such ventilation is required. The prescribed amount of onboard oxygen for aircraft can thus be reduced and flight routes leading directly over high-altitude terrain may be taken.

Gas mixture used for ventilation of passengers and crew in emergency situations. Depending on the density altitude, it has 7±5% CO.sub.2 at 15,000 ft flying altitude increasing to 17±5% CO.sub.2 at 30,000 ft flying altitude. The carbon dioxide improves the bioavailability of oxygen in the body. The gas mixture is produced by additive dosage of CO.sub.2 to either pure O.sub.2 or to a gas mixture having a fraction of N.sub.2 and a fraction of O.sub.2. The method for ensuring good ventilation in case of loss of cabin pressure, or generally in case of hyperventilation, involves making the gas mixture above available via respiration masks. The use of such a gas mixture also for ensuring good ventilation of people with limited mobility, if such ventilation is required. The prescribed amount of onboard oxygen for aircraft can thus be reduced and flight routes leading directly over high-altitude terrain may be taken.

A protective hood for air travel including a plurality of deformable partitions coupled to each other defining an inner cavity, wherein in a folded position the inner cavity is collapsed to a negligible size and in an unfolded position the inner cavity is configured to comfortably confine an human head, wherein one of the partitions includes a deformable opening configured to be stretched and fit over a head, and at least one coupling mechanism configured to attach one of the deformable partitions to an aircraft seat.

An aircraft overhead passenger service unit comprises a plurality of oxygen masks for supplying oxygen to aircraft passengers in an emergency situation; and at least two different oxygen mask storage portions, which are spaced apart from each other in a longitudinal direction (L). The plurality of oxygen masks are stored in the at least two different oxygen mask storage portions. The aircraft overhead passenger service unit further comprises an oxygen mask controller, which is switchable between at least two different configurations. The at least two different oxygen mask storage portions are individually associated with the at least two different configurations, with each of the at least two different configurations effecting a release of only the oxygen masks of the associated oxygen mask storage portion in the emergency situation.

An emergency oxygen system for aircraft comprising: a breathing gas supply circuit to be connected upstream to a source of breathing gas and downstream to at least one mask, a flow control valve configured to adjust the flow of breathing gas supplied to the mask, an electronics board configured to control the flow control valve, a power source, a switching device interposed between the power source and the electronics board, the switching device comprising a switch configured to have a first state in which power from the power source is supplied to the electronics board and a second state in which the electronics board is not supplied with power from the power source.