Personal air filtration apparatus and method

An apparatus for air filtration, comprising:

• a triangle-shaped nose guard including:
• a substantially flat bottom portion configured to cover a pair of nostrils of a nose;
• a first side portion extending upwards from a first end of the substantially flat bottom;
• a second side portion extending upwards from a second opposite end of the substantially flat bottom;
• and
• a front portion configured to connect the substantially flat bottom portion, the first side portion, and the second side portion;
• a body including:
• an air-exchange assembly having an exhaust tube with an open end and another end, two wings on opposite sides of said exhaust tube, and an intake check valve and an exhaust check valve disposed inside said exhaust tube;
• a filter receiver attaching to said air exchange assembly,
• a first replaceable filter surrounding said filter receiver;
• and
• a second replaceable filter disposed inside said filter receiver;
• wherein said exhaust tube includes a first aperture in a side of a wall of the exhaust tube near said another end, second aperture in another side of the wall of the exhaust tube connecting to said first wing, and third aperture in another side of the wall of the exhaust tube connecting to said second wing.

A method for filtering air, comprising:

• configuring a shaped body to conform to an inner dimensionality of a helmet and/or to conform to a contour of a user's face, wherein said body comprises an air-exchange assembly having an exhaust tube with an open end and a closed end, two wings on opposite sides of said exhaust tube, a first intake check valve and a first exhaust check valve inside said exhaust tube;
• a filter receiver attaching to said air exchange assembly, a first replaceable filter surrounding said filter receiver;
• and a second replaceable filter placing inside said filter receiver;
• wherein said exhaust tube includes a first aperture in a side of a wall of the exhaust tube near said closed end, second aperture in another side of the wall of the exhaust tube connecting to said first wing, and third aperture in another side of the wall of the exhaust tube connecting to said second wing;
• a triangle-shaped nose guard, wherein said triangle-shaped nose guard comprises a substantially flat bottom having a second exhaust check valve, a first side portion extending upwards from a first end of the substantially flat bottom, a second side portion extending upwards from a second opposite end of the substantially flat bottom, and a front portion having a second intake check valve;
• disposing said first intake check valve and said first exhaust check valve perpendicularly to said exhaust tube therein;
• disposing the first replaceable filter around said filter receiver;
• disposing the second replaceable filter inside said filter receiver;
• connecting a breather tube with two open ends therethrough an aperture on a wall of said exhaust tube at the breather tube's first open end;
• connecting a removable mouthpiece to said breather tube at one open end to form an air-tight connection;
• wherein:
• said replaceable first and second filters further comprise an air inlet for receiving ambient air and an air outlet for transferring filtered air through said intake check valve into said mouthpiece;
• said intake check valve is disposed perpendicularly adjacent to a top of said first aperture and is configured to open and allow unidirectional ingress of filtered air through said intake check valve into said mouthpiece during an inhale phase, wherein said exhaust check valve is configured to be closed;
• said first exhaust check valve is disposed perpendicularly adjacent to a bottom of said first aperture and is configured to open and allow unidirectional egress of exhaled air through said first exhaust check valve into said exhaust tube and vent during an exhale phase, wherein said first intake check valve is configured to be closed;
• and
• said second exhaust check valve is disposed substantially under the pair of nostril when said triangle-shaped nose guard is wore over the nose.