An apparatus and methods for air filtration are disclosed. The apparatus includes a body and first and second replaceable filters. The body of the apparatus further contains an air-exchange assembly and a filter receiver attached to the air exchange assembly. The air-exchange assembly contains an exhaust tube with an open end and a closed end, two wings on opposite sides of the exhaust tube, and an intake check valve and an exhaust check valve inside the exhaust tube. The first replaceable filter surrounds the filter receiver; and the second replaceable filter is inside the filter receiver. Several apertures and the check valves are strategically disposed in the exhaust tube to achieve optimal air filtration and avoid contamination of a user's exhaust.

A mouth seal assembly for use with a nasal mask system includes a mouth seal adapted to form a seal with the patient's mouth. The mouth seal is substantially independent from a supply of pressurized air from the nasal mask system. An anti-asphyxia valve may be provided to either the mouth seal over the patient's lips or the nasal mask system. A strap arrangement may support the mouth seal in a desired position on the patient's face in use.

A face mask assembly includes a face mask that has a concave shape such that the face mask covers the user's mouth and the user's nose when the face mask is worn. A pad is integrated into the face mask to extend across the user's nose when the face mask is worn. The pad is comprised of an air impermeable material to inhibit air exhaled by the user from passing between the face mask and the user's nose thereby inhibiting eyeglasses worn by the user from is fogged. A bendable strip is integrated into the pad thereby facilitating the bendable strip to retain the pad in a preferred shape to conform to the shape of the user's nose.

A face mask assembly includes a face mask that has a concave shape such that the face mask covers the user's mouth and the user's nose when the face mask is worn. A pad is integrated into the face mask to extend across the user's nose when the face mask is worn. The pad is comprised of an air impermeable material to inhibit air exhaled by the user from passing between the face mask and the user's nose thereby inhibiting eyeglasses worn by the user from is fogged. A bendable strip is integrated into the pad thereby facilitating the bendable strip to retain the pad in a preferred shape to conform to the shape of the user's nose.

A patient interface with a sealing device, the sealing device comprising a support membrane and a sealing membrane. The sealing membrane is designed at least in part to bear on the skin of a patient and the support membrane extends at least in part adjacent to the sealing membrane. The distance between the support membrane and the sealing membrane is at least in part such that an interspace is formed.

A ducted breathing apparatus and methods for assembling and using such ducted breathing apparatus are provided. The ducted breathing apparatus may include a face cover for sealing at least a portion of a user's face. The ducted breathing apparatus may include a ducted air channel element for providing direct air flow from a user's mouth within the mask to the outside environment. The ducted breathing apparatus may include a coupling element for providing a sealed mating connection between the ducted air channel element and the face cover.

The present invention relates to a nose-fitting adjuster. Particularly, the present invention relates to a nose-fitting adjuster, which can seal, without directly and intensely compressing the nose and a peripheral portion thereof, the corresponding portion, for a device, such as masks, goggles, gas masks, and VR headsets, that includes a portion coming in close contact with the nose region.

The present invention relates to a nose-fitting adjuster. Particularly, the present invention relates to a nose-fitting adjuster, which can seal, without directly and intensely compressing the nose and a peripheral portion thereof, the corresponding portion, for a device, such as masks, goggles, gas masks, and VR headsets, that includes a portion coming in close contact with the nose region.

The present disclosure is directed to a plurality of air quality devices configured to be held in a user's mouth and configured to increase at least one of humidity and temperature and constitution of air inhaled. There are passive and active systems that allow for improved physical and lung performance.

A personal entertainment respiratory apparatus provides air to a user to provide a fully immersive entertainment experience. The personal entertainment system may comprise a flow generator for providing the flow of air. A personal spatial respiratory interface may be coupled to the flow generator. The personal spatial respiratory interface may comprise an outlet for the flow generator. The personal spatial respiratory interface may further be configured to direct the flow of air within an ambient breathing proximity of a user. The personal entertainment respiratory apparatus may further comprise a controller and a sensory particle dispenser. The controller and sensory particle dispenser may be configured to selectively activate release of a sensory particle from the dispenser into the directed flow of air in response to an entertainment triggering signal.