The aircraft emergency oxygen supply system includes one or more sources of supplemental breathable oxygen, one or more inlet valves for one or more breathing devices, connected to the inlet valves, and one or more cabin air pressure transducers. A pressure controller controls the inlet valves in response to the one or more cabin air pressure transducers. One or more second pressure transducers may connected to conduits downstream of inlet valves to be monitored, and the pressure controller may also control operation of the inlet valves in response to the one or more second pressure transducers.

An apparatus, systems comprising the apparatus, and methods of using and making the apparatus are disclosed, with the apparatus comprising an inlet, at least one oxygen membrane separator in communication with the inlet and in communication with an ambient airflow, with the ambient airflow comprising an ambient oxygen concentration, at least one piezoelectric pump in communication with the at least one oxygen membrane separator, and an outlet for emitting an enhanced oxygen concentration airflow.

Described herein are a system for providing oxygen to oxygen masks in an aircraft, and an associated method for regulating the oxygen flow in an efficient manner. The system has an oxygen tank, oxygen masks, first and second oxygen lines, and an electrically controllable valve. The valve is coupled to the oxygen tank and the two oxygen lines. The oxygen masks are coupled to the oxygen lines downstream of the valve to accommodate the transfer of oxygen from the oxygen tank via the valve. In a working state when an electrical signal is applied the valve produces a connection between the oxygen tank and the first oxygen line when required, and permanently prevents a connection between the oxygen tank and the second oxygen line. When in a rest state, the valve produces a permanent connection between the oxygen tank and the second oxygen line.

A gas-leak management system including a primary duct; and a leak-management duct, at least a portion of the leak-management duct surrounding at least a portion of the primary duct, wherein the leak-management duct includes a gap between the portion of the primary duct and the portion of the leak-management duct, and including one or more vent holes in fluid communication with the gap.

An aircraft emergency oxygen dispensing device includes an oxygen storage vessel having a frangible pressure seal, and a manifold, a pressure regulator, one or more flow control valves connected to the oxygen storage vessel. The manifold includes an initiator for breaking the pressure seal to initiate a flow of oxygen. A flow controller controls the flow control valves to dispense small quantities of oxygen by a pulse oxygen system or a modulated oxygen system based on ambient cabin air pressure. In the pulse oxygen system, the flow controller further controls the flow control valves based on input from at least one breathing mask air pressure sensor that monitors the breathing of a user.

A retention system for use within a molecular sieve unit includes a perforated plate having a top face and bottom face. The perforated plate is configured to be positioned atop a packed sieve bed proximate an outlet end cap of the molecular sieve unit. A skirt is coupled to the bottom face of the perforated plate and a biasing member is configured to engage the outlet end cap and the top face of the perforated plate. The biasing member urges the perforated plate against the packed sieve bed. The biasing member may be one or more wave springs thereby reducing the risk of losing sufficient biasing force against the perforated plate. In the event that a sufficient biasing force is lost, the skirt may operate as a failsafe so as to minimize or prevent tilting of the perforated plate within the housing.

A pressure regulator system is disclosed. The system includes: a valve module; a controller; and a plurality of sensors. The controller is operably coupled to the valve module to adjust outflow of gas from an outlet of the valve module to a plurality of masks in an interior of an aircraft. The plurality of sensors comprises at least one of a pressure sensor and a temperature sensor and the controller is configured to receive feedback of sensed data at the outlet of the valve module about at least outlet pressure and ambient temperature from at least the pressure sensor and the temperature sensor and adjust the outflow of gas from the outlet of the valve module by determining an open-valve time based on the feedback of sensed data received from each sensor.

An air intake system for an aircraft having a ventral fairing and comprising a scoop having a ventral wall with a first coupling and an opening. The scoop is movable between a flush position in which the ventral wall is flush with the ventral fairing and a catchment position in which the opening is beneath the ventral fairing, and the ventral wall is pierced by a through hole designed to be connected to a flexible pipe of an air conditioning unit. A hatch is movably mounted on the scoop between an open position not blocking the opening and a closed position blocking the opening, the open position can be attained only when the scoop is in the catchment position. A return element forces the hatch into the closed position, and a plug has a second coupling which cooperates with the first coupling to removably secure the plug.

An emergency oxygen system for an internal cabin of a vehicle includes a housing including one or more compartments. One or more oxygen assemblies include a mask and a fluid conduit. The mask is configured to be stowed within and deployed from the one or more compartments. A door is moveably secured to the housing. The door is configured to pivot in an outboard direction from a closed position to an open position during a deployment event. One or more pouches can be secured to an interior surface of the door. Coiled tubing of the fluid conduit is retained by the one or more pouches when the mask is stowed within the one or more compartments. An alert device can be operatively coupled to the one or more oxygen assemblies. The alert device is configured to emit a response indicating that oxygen is flowing to the mask.

A compact system and method that makes use of a laser based gas detection to monitor aircraft breathing air. The basic principle of the analytical method to be utilized involves measurements of the amount of infrared light (IR) absorbed by the breathing air and contaminants in the air, each which has a unique fingerprint.