Abstract: A rotary recline mechanism for allowing reclining movement of a first part relative to a second part, the mechanism comprising: a first gear mechanism comprising first and second gear rings having first and second sets of teeth that engage to lock the first and second parts relative to each other and disengage on operation of an actuator to allow relative movement of the first and second parts by application of a force on one of the parts in a first direction, and a second override gear mechanism to allow relative movement of the first and second parts by application of a force in a second direction while the first and second sets of teeth are engaged.

Abstract: An articulating shelf including a first shelf portion having a first edge and an opposing second edge, a first hinge coupled the first edge of the first shelf portion, a second hinge coupled to the second edge of the first shelf portion, a second shelf portion having a first edge and an opposing second edge, the second edge of the second shelf portion coupled to the second hinge, a rod having a first end and an opposing second end, a rod support having a first end and a second send, the first end of the rod support coupled to the second edge of the second shelf portion and the second end of the rod support coupled to the rod between the first and the second ends of the rod, and an end cap including a plunger configured to extend and retract from the end cap.

Abstract: A system for securement of galley trolleys in aircraft comprises a motion sensor mounted to monitor a trolley in a trolley bay; a controller connected to the motion sensor, and an output device operatively connected to the controller. The controller is configured to receive a signal from the motion sensor to detect unsecured motion of a trolley in the trolley bay and the output device is configured to alert a user upon detection of unsecured motion of a trolley in the trolley bay. A method for securement of galley trolleys in aircraft includes monitoring a trolley in a trolley bay of an aircraft for motion and alerting a user upon unsecure motion of the trolley.

Abstract: A pressure relief valve comprises a base attachable to the pressure vessel at a vessel aperture, the base comprising a base face, the base face facing away from the vessel; a cap comprising a cap face, the cap face facing towards the vessel, the cap movable between an open position and a closed position, wherein in the closed position the cap seals the vessel aperture and in the open position flow through the vessel aperture is permitted to relieve pressure in the pressure vessel; and a gasket between the base face and the cap face, wherein in the closed position: the base face and the cap face contact the gasket at a first location to form a first seal; and the base face and the cap face contact the gasket at a second location to form a second seal.

Abstract: A sanitization system for an aircraft cabin may comprise: a cabin of an aircraft; a light system including a lighting unit configured to emit an electromagnetic radiation output between 300 and 430 nanometers (“nm”); an external reactive oxygen species (ROS) generator in fluid communication with the cabin, wherein the sanitization system is configured to disinfect a target area of the cabin by targeting the target area with the electromagnetic radiation output and the ROS.

Abstract: A faucet includes a faucet housing defining a mixing chamber and a dry chamber, a valve assembly, and a damper assembly. The valve assembly includes a main shaft having a first end and a second end, a knob coupled to the first end, a mixing plate coupled to the second end, a main seal coupled to the main shaft, and a first biasing member disposed around the main shaft. The first end is disposed within the mixing chamber and the second end is disposed within the dry chamber. The damper assembly includes an outer cylinder disposed within the dry chamber, a piston extending at least partially into the outer cylinder, and a second biasing member disposed within the outer cylinder. The piston has an interference surface configured to contact the knob, and the second biasing member is configured to bias the piston.

Abstract: A leakage protection system for a heating, ventilation, and air condition (HVAC) system can comprise: a power source; a louvered assembly including a frame, slats spaced apart vertically within the frame and extending from a first side to a second side of the frame, an actuator rod operably coupled to the slats, and a spring; a solenoid operably coupled to the actuator rod; and a first pressure switch disposed electrically between the power source and the solenoid.

Abstract: An automatic drain system may comprise a drain including a neck defining a drain orifice and a flange extending from the neck. A liquid detection sensor is located on at least one of the neck or the flange. A sink assembly may comprise a sink basin and the drain located in a sink opening formed in the sink basin.

Abstract: A cabin attendant seat includes a housing having an upper portion and a lower portion, a headrest rotatably coupled to the upper portion, a seat pan coupled to the lower portion, and a drop-down tray assembly rotatably coupled to the upper portion. The seat pan is detached from the headrest. The drop-down tray assembly and the headrest are configured to rotate along a first axis such that the drop-down tray assembly defines a platform.

Abstract: A passenger seat including laterally repositionable armrests wherein a seat bottom width adjusts automatically according to the lateral armrest position. Adjustment mechanisms positioned on the opposing lateral sides of the seat carry the armrests and are driven inward and outward to laterally reposition the armrests. In some embodiments, the adjustment mechanism includes levers drive by a connecting frame coupled to a motion driver such as a rack-and-pinion mechanism positioned in the seat bottom. In embodiments, the cushion utilizes stored internal energy from the cushion construction to expand when the armrests are repositioned laterally outward.

Abstract: A trolley is disclosed herein. In various embodiments, the trolley comprises: a housing defining a cavity; a handle coupled to the housing; a sensor coupled to the handle; a plurality of wheels coupled to the housing; and a brake system configured to lock a wheel in the plurality of wheels in response to a hand being released from the handle based on sensor data from the sensor. The trolley can comprise a control system and/or a sanitization system.

Abstract: In accordance with at least one aspect of this disclosure, a contoured class divider for dividing an aircraft cabin arrangement between at least one forward passenger seat and at least one aft passenger seat, includes a panel positioned adjacent to and rearwardly of the at least one forward seat. The panel has a contoured shape for receiving the back of the forward passenger seat in at least one of a reclined position and an upright position. The panel extends substantially from an underside of an overhead bin to a cabin floor. In embodiments, at least a portion of the panel is configured to deform or break during a crash event due to one or more of a head impact by a passenger in the aft passenger seat with the panel and/or inertial forces of the crash event acting on the panel.

Abstract: Systems, methods, and articles of manufacture for controlling a lid of a trash receptacle of an aircraft lavatory. Generally, the systems, methods, and articles of manufacture disclosed and described herein facilitate controlled opening and closing actuations of a lid of a trash receptacle of an aircraft lavatory. By controlling the opening and/or closing actuations of the lid, hygiene and sanitation of the lavatory are improved, odors are prevented from dispersing throughout the lavatory and/or cabin of the aircraft, and fire hazards are reduced.

Abstract: A queue system for a lavatory of an aircraft can include a queue module configured to receive a request from a user input device and to create and/or modify a virtual lavatory queue based on a request hierarchy of the request to position the request in the virtual lavatory queue, and a sensor operatively connected to the queue module and configured to output a state change signal indicative of a user leaving the lavatory. The queue module can be configured to receive the state change signal, iterate the virtual lavatory queue in response to the state change signal, and output a vacancy indicator signal to an indicator device associated with a request that is at a front of the virtual lavatory queue after iterating the virtual lavatory queue to indicate to a user that it is the user's turn in the queue.

Abstract: A personal breathing system incorporating a phased-dilution demand oxygen regulator (PDDOR) includes a pressurized oxygen source and oronasal mask, a dilution valve for supplying ambient air and a demand valve for supplying pure oxygen. The PDDOR senses the mask pressure associated with the start of an inhalation cycle, maintaining pressure to the demand valve through an initial demand phase during which 100% pure oxygen is supplied through the demand valve. Control pressure within the PDDOR drops throughout the initial demand phase; when the pressure drops below a lower threshold the PDDOR main valve is closed, blocking the demand valve and cutting off the oxygen supply. Ambient air is provided to the mask via a dilution valve to preserve flow to the user.

Abstract: A composite cylinder assembly may comprise a tube liner and a port. The tube liner may include a closed bottom portion, a substantially cylindrical wall, and a domed head portion defining a neck. The port may comprise an outer diameter configured to fit into an inner diameter of the liner neck. The port may further comprise a lip including an outer diameter that is greater than the inner diameter of the liner neck. The port may also comprise a swage recess having an outer diameter that is less than the inner diameter of the liner neck. The port may be configured to press-fit into the liner neck. The lip may be configured to provide a surface area to weld the port to the liner neck. The swage recess may be configured to provide an area to swage the liner neck to the port.

Abstract: A composite cylinder assembly may comprise a tube liner including a first domed portion defining a first liner neck, a second domed portion defining a second liner neck, and a cylindrical wall. The cylinder assembly may comprise at least one port. The port may comprise an outer diameter configured to fit into an inner diameter of a liner neck and a lip including an outer diameter that is greater than the inner diameter of the liner neck. The port may comprise a swage recess having an outer diameter that is less than the inner diameter of the liner neck and may be configured to press-fit into the liner neck. The lip may be configured to provide a surface area to weld the port to the liner neck. The swage recess may be configured to provide an area to swage the liner neck to the port.

Abstract: The present disclosure provides a polymer matrix composite comprising reinforcement fibres and a (meth)acrylate copolymer matrix formed from a (meth)acrylate monomer and a halogenated flame retardant monomer; a method of preparing the polymer matrix composite, and a composition for use in the method.

Abstract: A first composition is disclosed that includes a fire-resistant thermoplastic resin. The fire-resistant thermoplastic resin includes 1-20 wt % of an aryl phosphate, includes 1-20 wt % of a phosphate polymer, and 60%-98% of a (meth)acrylic polymer, including units from at least one monomer, wherein the monomer is chosen from methyl methacrylate, acrylic acid, methacrylic acid, acrylic acid esters, methacrylic acid esters, acrylonitrile and maleic anhydride. The first composition may further include a fabric or a composite material that is embedded with the fire-resistant thermoplastic resin. In some instances, the aryl-phosphate and the phosphonate polymer synergistically reduce an effective heat of combustion, a peak heat release, or a flame time as compared to a second composition that contains only one of the aryl phosphate or the phosphonate polymer.

Abstract: A method for operating an image segmentation system includes receiving image data from a sensor, detecting a vessel is present in the image data, extracting a region of interest, and classifying the image data based on the region of interest.