公开(公告)号：CA983201A

公开(公告)日：1976-02-10

申请号：CA178465

申请日：1973-08-09

Applicant: WHITE STUART A

Inventor： POIRIER REGINALD E

IPC: A42B3/24 ,  A61F9/02

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.