Patent ID: 8910634

Claim:
A stress deformable and sealed breathing mask, the mask comprising: an air permeable rectilinear mask body having at least one layer of air filtering material; a resilient sealing strip configured to create a sealing engagement with a user's face at an upper edge of the mask body; an upper attachment strap in a laced engagement with the mask body and the resilient sealing strip such that tightening of the upper attachment strap about a user's head causes the sealing engagement of the resilient sealing strip to resiliently deform substantially along the laced engagement to the contour of the user's face and in the bridge area of the user's nose, wherein the resilient sealing strip defines a first set of lacing apertures in a central segment and a second set of lacing apertures at each end thereof, and wherein the mask body defines a set of lacing apertures corresponding to each of the first and second sets of lacing apertures of the resilient sealing strip, and wherein the upper attachment strap is lacingly engaged through each of the sets of lacing apertures of the mask body and the each of the first and second sets of lacing apertures of the resilient sealing strip, and also wherein the mask body further includes a set of inwardly positioned lacing apertures from each end of the mask body at a distance of one-sixth to one-fourth of a width of the mask body, and further wherein the upper attachment strap is in laced engagement with the set of inwardly positioned lacing apertures of the mask body, wherein the sealing engagement of the resilient sealing strip has the central segment for resting on the bridge of the user's nose, and further wherein the sealing engagement of the resilient sealing strip includes a downwardly extending protrusion proximate to each side of the central segment to bear against the side of the user's nose; and a lower attachment strap for securing a bottom of the mask body against a portion of the user's face below the user's mouth.