Patent ID: 8439038

Claim:
A respirator comprising: a main body adapted to cover the mouth and nose of a user of the respirator, the main body having an inner surface adjacent the user and an opposite outer surface; a first inner vent body defining a first inner vent body opening with a first membrane covering the first inner vent body opening; a second inner vent body defining a second inner vent body opening with a second membrane covering the second inner vent body opening; a deflection member spanning between said first and second inner vent bodies along the inner surface of the main body, the deflection member inducing an outward bias to the main body for resisting the collapse of the main body due to respiration of a user during use of such a respirator; a first outer vent body attached to the first inner vent body with at least a portion of the main body disposed between the first outer vent body and the first inner vent body; and a second outer vent body attached to the second inner vent body with at least a portion of the main body disposed between the second outer vent body and the second inner vent body.