A mouthpiece for controlled delivery of a breathing gas including oxygen, preferably an increased ratio of oxygen with respect to ambient air, to the respiratory tracts of a user which includes a valve having two modes: a closed default mode, which substantially impedes any flow of the breathing gas through the valve; and an active open mode, which allows for a substantial flow of the breathing gas through the valve, wherein the open mode can be activated by the user manipulating the valve with his/her mouth. Such a valve may be used in a device for delivery of breathing gas and in an apparatus for controlled delivery of the breathing gas to the respiratory tracts of a user. A method for controlled delivery of the breathing gas to the respiratory tracts of a user may include operating the valve.

A dental appliance apparatus is disclosed herein. In various aspects, the dental appliance may include a body removably attachable to one or more teeth selected from premolars and molars, and a flange extending forth from lingual portions of the body to contact a tongue at one or more locations proximate the premolars and the molars in order to cause a contraction of the genioglossus that positions the tongue anteriorly and downward toward the mandible by stimulation of the hypoglossal nerve. The dental appliance may include a connector connected to the body, and the connector may pass about buccal-labial sides of the anterior teeth. A bumper may be included on a labial side of the connector, and the bumper may contact the lips to promote pursed lips breathing. An anterior flange may extend lingually from the connector to stimulate the hypoglossal nerve proximate a tip of the tongue in order to cause contraction of the genioglossus to position the tongue anteriorly and downward toward the mandible.

A personal breathing apparatus; the personal breathing apparatus includes a body having an exhaust port, a nasal-port, at least one filter-port, and a mouth-port. A nasal insert is configured to attach to the nasal-port. A mouthguard is anatomically shaped to create an air-tight seal to a user's mouth. The mouthguard is configured to attach to the mouth-port. The filter-port is designed to attach to at least one filter. At least one filter is included with the personal breathing apparatus. By design, the personal breathing apparatus is lightweight and unobtrusive. The personal breathing apparatus does not rely on an airtight seal between the apparatus and a large portion of the surface area of the users face.

A personal breathing apparatus; the personal breathing apparatus includes a body having an exhaust port, a nasal-port, at least one filter-port, and a mouth-port. A nasal insert is configured to attach to the nasal-port. A mouthguard is anatomically shaped to create an air-tight seal to a user's mouth. The mouthguard is configured to attach to the mouth-port. The filter-port is designed to attach to at least one filter. At least one filter is included with the personal breathing apparatus. By design, the personal breathing apparatus is lightweight and unobtrusive. The personal breathing apparatus does not rely on an airtight seal between the apparatus and a large portion of the surface area of the users face.

A head wearable air purifier has a headgear, and an air purifier assembly supported by the headgear, the air purifier assembly having a filter and an airflow generator for generating an airflow through the filter. The head wearable air purifier has a nozzle assembly having an inlet aperture configured to receive a filtered airflow from the air purifier assembly, and an air outlet for emitting the filtered airflow from the nozzle assembly. The nozzle assembly includes a first end section connected to the headgear, a second end section connected to the headgear, and a midsection connected to the first end section and the second end section. The first end section has a first portion pivotally connected to the midsection about a first pivot axis, and a second portion pivotally connected to the first portion about a second pivot axis substantially orthogonal to the first pivot axis, the second portion connected to the headgear.

A nasal clip and/or dilator which is U-shaped having protruding wider spherical/spheroid holders at each end of the U is designed to be placed such that each spherical holder is in a nostril. The U-shaped clip can press against the columella and each holder against the septum. Inside each holder is a scented piece, such as a plastic ball or cylinder with aromatic compounds there-in which exit from the surface of the respective scented piece. To facilitate the scent escaping from the scented piece and into the nose, each holder has portals such as around the circumference thereof and/or on opposite sides thereof, transverse to the U of the holder.

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.

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 respiratory muscle strengthening device includes: a mask body which covers at least a part of the face of a user; a pressure unit which is provided at one side of the mask body to control air inhaled from the outside of the mask body; a sensor unit which is provided at one side of the mask body to measure a respiratory pattern of the user; a band part which is formed to extend from the opposite ends of the mask body and by which the mask body is brought into close contact with the face of the user; and a cover part which is detachably coupled to one side of the mask body. The cover part includes a filtering part which filters out particles in the air.

The present invention relates to novel, handheld devices for delivering breathable gas. In particular, the present invention relates to novel, handheld devices for delivering lifesaving oxygen to a user when during an emergency such a in a smoke-filled room during a fire, underwater during an automobile accident, a toxic chemical spill and the like.