US Patent 11324264 Facial mask with expandable rib structures

Apparatus to limit exposure to pathogens. The apparatus includes two hinges connected by a hinge connector, a plurality of ribs, and mask material. The plurality of ribs includes at least a base rib and a top rib. A first end of each rib is connected to a first hinge of the two hinges and a second end of each rib is connected to a second hinge of the two hinges. The two hinges are configured to position and secure the top rib at multiple positions and configurations. The ribs are attached to the mask material.