Patent ID: 6961959
Filing Date: 2005-11-08
Classification: A61F

Abstract:
1. A protective mask comprising: a mask body made from an anti-infrared plastic material and formed with a window frame protruding therefrom in a transverse direction relative to said mask body, said window frame defining a window; and a viewing member mounted detachably in said window frame so as to cover said window and adapted to permit vision therethrough, wherein said window frame includes left and right frame parts, each of which is formed with a first retaining slot, said viewing member being in the form of a flexible plate having opposite left and right sides and left and right tongues formed respectively on said left and right sides and projecting respectively into said first retaining slots in said left and right frame parts, said plate being flexible in such a manner that bending of said left and right sides of said plate toward each other results in disengagement of said left and right tongues from said first retaining slots, further wherein said mask body has upper and lower frame parts interconnecting and cooperating with said left and right frame parts to define said window frame, said upper and lower frame parts respectively having curved upper and lower front ends, said plate being curved and being convex frontwardly and having a concave rear face abutting against said upper and lower front ends.