Attachment system for replacement helmet respirator lens

摘要

A replaceable lens attachment system for respiratory devices and methods of use. The replaceable lens attachment system includes a face shield having rotatable attachment members and a replaceable lens. The rotatable attachment members include cams and flanges. The attachment system may further comprise a helmet respirator with support elements disposed thereon. The method includes bowing the lens and inserting it into the frame. The rotatable attachment members are rotated to urge the lens into the frame and cover the frame. The flanges and support elements provide impact resistance to the lens.