Helmet face shield

Abstract

A face shield or visor for a helmet which has a second lense fitted into a gapped space underneath the first lense and has improved anti fogging properties.

1 . A face shield for a helmet having a face opening comprising
 a lense viewing area having an outer lense and an inner lense spaced apart therefrom and a surrounding frame portion having a thickness, an outer surface and an inner surface;   the outer lense having an outer surface and an inner surface;   the inner lense having a thickness, a perimeter, an outer surface and an inner surface;   wherein said inner lense is attached to the outer lense substantially along its perimeter defining a uniform air space between the inner surface of the outer lense and the outer surface of the inner lense;   and wherein the lense viewing area is coterminous with the frame portion defining a common inner surface area for the face shield.   
     
     
         2 . The invention as claimed in  claim 1  wherein the outer lense is elevated above the frame portion defining a uniform gapped space thereunder for attachment therein of the second lense. 
     
     
         3 . The invention as claimed in  claim 2  wherein the uniform gapped space has a thickness at least equal to the thickness of the inner lense and the thickness of the air space. 
     
     
         4 . The invention as claimed in  claim 3  wherein the helmet has an integral chin portion and the periphery of the face opening is lined with a gasket material. 
     
     
         5 . The invention as claimed in  claim 4  wherein the face shield is adapted to rotate on the helmet between a first open position exposing the face opening and a second closed position covering the face opening and wherein the inner surface of the face shield frictionally engages the gasket material to thereby environmentally seal the face opening. 
     
     
         6 . The invention as claimed in  claim 5  wherein the inner lense is adhesively attached to the outer lense. 
     
     
         7 . The invention as claimed in  claim 6  wherein the inner lense and outer lense are made of the same material. 
     
     
         8 . The invention as claimed in  claim 7  wherein the inner lense is optically correct with the outer lense.