Abstract: A PAPR blower includes a frame comprised of three interconnected sections. A first flexible manifold connects between the first and second polygonal sections, and a second flexible manifold connects between the first and third polygonal sections. The second and third polygonal sections each include a respiratory filter. The first polygonal section comprises a vacuum motor and an outlet for filtered air. The vacuum motor generates a vacuum in the manifolds, thereby drawing ambient air into the respiratory filters and delivering filtered air from the respiratory filters, through the manifolds, and to the filtered air outlet. The blower may include an air delivery tube comprising a first end configured to be attached to the filtered air outlet and a second end configured to be attached to a breathing mask. The air delivery tube includes electrical wiring and a switch at the second end for controlling operation of the blower.

Abstract: An intraoral flexible mouthpiece including: a hollow dome portion including a peripheral proximal edge. The hollow dome portion extends distally, and the hollow dome portion includes a central orifice located at the distal portion of the hollow dome portion. A peripheral flexible sheet flange attached along the dome portion peripheral proximal edge. A tube attached to the central orifice and extending distally therefrom. The peripheral flexible sheet flange is configured to be placed in the mouth between the teeth and gums on one side and the lips and cheeks on the other side, and the hollow dome portion is configured to protrude distally out of the mouth.

Abstract: The present invention relates to an intraoral flexible mouthpiece comprising: a hollow dome portion comprising a peripheral proximal edge wherein said hollow dome portion extends distally and wherein said hollow dome portion comprises a central orifice located at the distal portion of said hollow dome portion; a peripheral flexible sheet flange attached along said dome portion peripheral proximal edge; a tube attached to said central orifice and extending distally therefrom; wherein said peripheral flexible sheet flange is configured to be placed in the mouth between the teeth and gums on one side and the lips and cheeks on the other side, and wherein the hollow dome portion is configured to protrude distally out of the mouth.