COLLAPSE RESISTANT RESPIRATOR

摘要

A respirator including a collapse-resistant means for resisting collapse of the respirator main body due to respiration of a user during use of such a respirator is disclosed. Specifically, in various embodiments, the col-lapse-resisting means may be a deflection member, a stiff-ening material, fastening components configured to apply an outward-facing deflection force when the respirator is worn, or any combination thereof Additionally, a dual ex-halation vent assembly adapted for use in a collapse resist-ing respirator is also disclosed.