Described are oxygen control systems that utilize compressed air or oxygen. The oxygen control systems may include a control device having a first inlet that enables the flow of a supply gas from a high pressure gas source at an input pressure into the control device. The control device also includes a second inlet that enables a flow of atmospheric air into the control device and an outlet in fluid communication with the first inlet and the second inlet. The control device also includes a pressure regulator that is operable in a first mode and a second mode. In the first mode, the pressure regulator reduces input pressure of the gas to a first outlet pressure at the outlet, and, in the second mode, the pressure regulator reduces the input pressure of the gas to a second outlet pressure at the outlet that is greater than the first outlet pressure.

A vented anti-contaminant device and more specifically to a wearable device incorporating a conduit network that uses sorption to protect users against viral, bacterial, fungal, protozoan, microbial, particulate, and xenobiotic contaminants is disclosed. In one embodiment, a wearable protective device, comprising: a breathing chamber; a conduit network attached to the breathing chamber at a first conduit network terminal portion such that the breathing chamber is in fluid communication with the first conduit network terminal portion; a second conduit network terminal portion of the conduit network in fluid communication with an air source; and a sorption structure within the conduit network is disclosed.

A vented anti-contaminant device and more specifically to a wearable device incorporating a conduit network that uses sorption to protect users against viral, bacterial, fungal, protozoan, microbial, particulate, and xenobiotic contaminants is disclosed. In one embodiment, a wearable protective device, comprising: a breathing chamber; a conduit network attached to the breathing chamber at a first conduit network terminal portion such that the breathing chamber is in fluid communication with the first conduit network terminal portion; a second conduit network terminal portion of the conduit network in fluid communication with an air source; and a sorption structure within the conduit network is disclosed.

An airflow device configured for creating an air barrier includes a fan, a power source, a laminar assembly, and an attachment mechanism. The power source is coupled to the fan. The laminar assembly includes a plurality of tubes and is coupled to the fan so that air flow generated by the fan passes through the plurality of tubes to create the air barrier. The attachment mechanism attaches the laminar assembly to a user in a location near the user's head such that the air barrier created by the laminar assembly is positioned in front of the user's face. A plenum is positioned between the fan and the laminar assembly such that the air flow generated by the fan passes through the plenum and then through the laminar assembly. The airflow device acts as a face shield that protects the user from airborne contaminants and viruses.

An airflow device configured for creating an air barrier includes a fan, a power source, a laminar assembly, and an attachment mechanism. The power source is coupled to the fan. The laminar assembly includes a plurality of tubes and is coupled to the fan so that air flow generated by the fan passes through the plurality of tubes to create the air barrier. The attachment mechanism attaches the laminar assembly to a user in a location near the user's head such that the air barrier created by the laminar assembly is positioned in front of the user's face. A plenum is positioned between the fan and the laminar assembly such that the air flow generated by the fan passes through the plenum and then through the laminar assembly. The airflow device acts as a face shield that protects the user from airborne contaminants and viruses.

A device for enhancing efficiency of an air mask (204) wearable by a user to cover the mouth and nose of the user includes an elongated chamber (202) fluidly couplable at a proximal end thereof to an air opening (205, 205′) of the mask (204). A filter element (206) formed of flexible material is wrapped around a sidewall of the chamber either internally or externally and has a surface area that is at least twice as large as that of the mask for filtering air flowing through the chamber in either direction, and a one-way valve (227, 228) is mounted in association with the opening for allowing filtered air inhaled by the user to pass from the chamber to the mask or for allowing an air exhaled by the user to pass from the mask to the chamber.

A device for enhancing efficiency of an air mask (204) wearable by a user to cover the mouth and nose of the user includes an elongated chamber (202) fluidly couplable at a proximal end thereof to an air opening (205, 205′) of the mask (204). A filter element (206) formed of flexible material is wrapped around a sidewall of the chamber either internally or externally and has a surface area that is at least twice as large as that of the mask for filtering air flowing through the chamber in either direction, and a one-way valve (227, 228) is mounted in association with the opening for allowing filtered air inhaled by the user to pass from the chamber to the mask or for allowing an air exhaled by the user to pass from the mask to the chamber.

This application discloses a novel face mask with a neck hanger that facilitates flow of filtered fresh air inside the face mask for inhaling. The neck hanger is a lightweight tube that houses two fans, HEPA or ULPA filters, and a battery with a controller circuit. One fan sucks the air from the environment and after being filtered is blown into the face mask through an air pipe that is attached to both the neck hanger and the face mask. The exhaled air from the nose or mouth is sucked by a second fan through another air pipe, then filtered and released into the environment.

This application discloses a novel face mask with a neck hanger that facilitates flow of filtered fresh air inside the face mask for inhaling. The neck hanger is a lightweight tube that houses two fans, HEPA or ULPA filters, and a battery with a controller circuit. One fan sucks the air from the environment and after being filtered is blown into the face mask through an air pipe that is attached to both the neck hanger and the face mask. The exhaled air from the nose or mouth is sucked by a second fan through another air pipe, then filtered and released into the environment.

Provided is a powered air blower unit for delivering air flow to a user with constant air flow or varying speeds of air flow. The air blower unit may also include a filter for purifying the air.