Abstract A transparent protective face shield (or mask), having one or more exhaust ducts, each of which has an intake opening in or upon the inner surface of the shield in the region generally opposite the wearer''s nostrils and mouth, and a confined passage extending from said intake opening laterally along either the inner or outer surface of the shield in the direction of an edge thereof to a discharge opening in or upon the exterior surface of the shield and so positioned that an external airstream, caused by relative motion of the wearer and the surrounding air, passes over or across such discharge opening, whereby said external airstream imposes an aspiratory suction upon the duct which withdraws air from beneath the shield in front of the wearer''s face and discharges such air into such external airstream.
In a face shield, the improvement comprising a pair of aspirating exhaust ducts for the withdrawal of breath-laden air from the interior of said shield each of said exhaust ducts having an intake opening in or upon the inner surface of said shield generally in front of the wearer''s nostrils and mouth, a confined passage extending substantially laterally from said intake opening to a discharge opening located adjacent an edge of said shield and an inner sidewall extending rearwardly beyond said discharge opening.
Claim 2
Dependent Claim
83 words
In a face shield, the improvement comprising a pair of aspirating exhaust ducts for the withdrawal of breath-laden air from the interior of said shield each of said exhaust ducts having an intake opening in or upon the inner surface of said shield generally in front of the wearer''s nostrils and mouth, a confined passage extending substantially laterally from said intake opening to a discharge opening located adjacent an edge of said shield and an inner sidewall extending rearwardly beyond said discharge opening.
Claim 3
Dependent Claim
90 words
In a helmet having attached thereto a protective face shield, the improvement comprising a pair of aspirating exhaust ducts for the withdrawal of breath-laden air from the interior of said helmet and shield each of said exhaust ducts having an intake opening communicating with the interior of said helmet and shield and an enclosed passage extending substantially laterally from said intake opening to a discharge opening communicating with the exterior of said helmet and shield, a portion of the exterior surface of said helmet extending rearwardly beyond said discharge opening.
Claim 4
Dependent Claim
90 words
In a helmet having attached thereto a protective face shield, the improvement comprising a pair of aspirating exhaust ducts for the withdrawal of breath-laden air from the interior of said helmet and shield each of said exhaust ducts having an intake opening communicating with the interior of said helmet and shield and an enclosed passage extending substantially laterally from said intake opening to a discharge opening communicating with the exterior of said helmet and shield, a portion of the exterior surface of said helmet extending rearwardly beyond said discharge opening.