Patent ID: 7191778

Claim:
A respiratory mask comprising: a shield of an air impermeable bent sheet that defines a rim-receiving recess at a concave side of said bent sheet, and that has a central portion which is adapted to confront the nose and the mouth of a wearer; and a mask body aligned with the bent sheet in a transverse direction relative to the face of the wearer, detachably connected to said shield, said mask body including a rim that is received in said rim-receiving recess, that defines a chamber therein for receiving the nose and the mouth of the wearer, wherein said rim includes: an outer end covered by said central portion of said sheet, and an inner end opposite to said outer end in the transverse direction configured and positioned to contact the face of the wearer, said rim being formed with an aperture that is disposed between and that is spaced apart from said inner and outer ends and that is in spatial communication with said chamber, said mask body further including a filter sheet that is permeable to air, that is attached to said rim to cover said aperture, that extends outwardly from an exterior of said rim, and that is covered by said bent sheet, said filter sheet cooperating with said bent sheet to define a gap therebetween, said gap extending outwardly of said chamber from the exterior of said rim and being in fluid communication with said chamber through said filter sheet and said aperture.