A communication assembly for avoiding interferences due to oxygen flow noise, including a) a breathing mask having a body having a face shell having a breathing cavity and a regulator delivering a breathing gas, b) a microphone configured to capture a sound signal in the breathing cavity, c) a test button for supplying the breathing cavity with breathing gas, d) an attenuation device, e) a sound monitoring system, f) a controller configured to the attenuation device operate in an active mode when a flow noise though the breathing cavity during inhalation by the user is detected, and an inactive mode when a vocal sound or a flow noise in the breathing cavity in a stowed configuration is detected, and g) a transmitter for transmitting an output signal.

A device for provision of oxygen masks has a container, which can be closed by a cover, for accommodating one or more oxygen masks, at least one extendable arm having an outer end, and a driving device. The outer end is coupled to at least one oxygen mask. The arm is designed to adopt a storage position, wherein the arm is arranged completely within the container, and an extended position, wherein the outer end is extended out of the container and the arm holds the at least one oxygen mask coupled thereto laterally at a distance from the container. For extension, the driving device is coupled to the arm. The arm has an end piece, on which a wound-up hose can be releasably fixed. A fixing device is formed on the end piece in such a way as to release the wound-up hose when the extended position is reached.

A device for provision of oxygen masks has a container, which can be closed by a cover, for accommodating one or more oxygen masks, at least one extendable arm having an outer end, and a driving device. The outer end is coupled to at least one oxygen mask. The arm is designed to adopt a storage position, wherein the arm is arranged completely within the container, and an extended position, wherein the outer end is extended out of the container and the arm holds the at least one oxygen mask coupled thereto laterally at a distance from the container. For extension, the driving device is coupled to the arm. The arm has an end piece, on which a wound-up hose can be releasably fixed. A fixing device is formed on the end piece in such a way as to release the wound-up hose when the extended position is reached.

A system may include a manifold. The manifold may include a body and a rupture disc. The body may include first connector connected to a pressurized source, a second connector, and a third connector. The body may include hollow pathway network including a first path portion extending from the pressurized source to a pathway junction, a second path portion extending from the pathway junction to the second connector, and a third path portion extending from the pathway junction to the third connector. The first path portion may include a bend. The rupture disc may be positioned between the bend and the pathway junction. When the rupture disc is in an unruptured state, the rupture disc may seal the first path portion from the other path portions. When the rupture disc is in a ruptured state, the rupture disc may allow a flow from the pressurized source to the third connector.

A system may include a manifold. The manifold may include a body and a rupture disc. The body may include first connector connected to a pressurized source, a second connector, and a third connector. The body may include hollow pathway network including a first path portion extending from the pressurized source to a pathway junction, a second path portion extending from the pathway junction to the second connector, and a third path portion extending from the pathway junction to the third connector. The first path portion may include a bend. The rupture disc may be positioned between the bend and the pathway junction. When the rupture disc is in an unruptured state, the rupture disc may seal the first path portion from the other path portions. When the rupture disc is in a ruptured state, the rupture disc may allow a flow from the pressurized source to the third connector.

A control system for an onboard oxygen generating system (OBOGS) includes a gain control communicatively coupled to an oxygen sensor configured to measure an oxygen concentration outputted from the OBOGS. The gain control selectively switches between unbalanced and balanced bed cycling modes of the OBOGS to produce a target oxygen concentration based on demand. A corresponding method includes providing a gain control communicatively coupled to an oxygen sensor configured to measure an oxygen concentration outputted from the OBOGS, controlling the OBOGS to operate in the unbalanced bed cycling mode when a low demand is placed on the OBOGS whereby the gain control provides a short bed cycle and a corresponding long cycle of a fixed cycle time, and switching the OBOGS to operate in the balanced bed cycling mode when a high demand is placed on the OBOGS. The balanced bed cycling mode operates at a decreased bed cycle time.

A control system for an onboard oxygen generating system (OBOGS) includes a gain control communicatively coupled to an oxygen sensor configured to measure an oxygen concentration outputted from the OBOGS. The gain control selectively switches between unbalanced and balanced bed cycling modes of the OBOGS to produce a target oxygen concentration based on demand. A corresponding method includes providing a gain control communicatively coupled to an oxygen sensor configured to measure an oxygen concentration outputted from the OBOGS, controlling the OBOGS to operate in the unbalanced bed cycling mode when a low demand is placed on the OBOGS whereby the gain control provides a short bed cycle and a corresponding long cycle of a fixed cycle time, and switching the OBOGS to operate in the balanced bed cycling mode when a high demand is placed on the OBOGS. The balanced bed cycling mode operates at a decreased bed cycle time.

Breathing mask comprising a shell and a harness, wherein: the breathing mask also comprises a folding system adapted to make the harness move from an extended position to a folded position, the folding system also comprises a pulling device and a guide device, the pulling device has a connecting portion connected to the harness and a gripping portion, the guide device is connected to the shell, the pulling device is free to move between a first position and a second position, and the guide device cooperates with the pulling device to guide the pulling device between the extended position and the folded position.

Breathing mask comprising a shell and a harness, wherein: the breathing mask also comprises a folding system adapted to make the harness move from an extended position to a folded position, the folding system also comprises a pulling device and a guide device, the pulling device has a connecting portion connected to the harness and a gripping portion, the guide device is connected to the shell, the pulling device is free to move between a first position and a second position, and the guide device cooperates with the pulling device to guide the pulling device between the extended position and the folded position.

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.