Air filtration apparatus and method

摘要

An air filtration apparatus is disclosed. During inhale response, user's breath opens a first air valve causing air flow through replaceable filter through a chamber to a mouth piece disposed in a user's mouth. During exhale response, user's breath closes first valve causing one or more exhaust valves to open. In one embodiment, inhale and exhale responses are displaced from one another to provide better isolation of replaceable filter.

主权项

1. An air filtration assembly comprises:
a front cover; a back cover; a mouth piece; a first valve coupled to a first diaphragm to open and close in response to an inhale response of flow of a user's breath; a second valve coupled to a second diaphragm to open and close in response to an exhale response of the flow of the user's breath; and a wrap-around contoured chamber formed by the front cover and the back cover having approximately 25 to 45 degree angled walls between the mouth piece in the direction of the second valve and configured to increase suction between the mouth piece and at least one of the first and the second valves.