RIGID AIR DUCTING FOR RESPIRATOR HOODS AND HELMETS

摘要

A respirator hood (1) that has an air chamber (6) arranged above the head of a user for delivery of breathable air. The air chamber (6) has an air inlet (13) connected to an air supply hose (5) and an air outlet (17). The outlet (17) is arranged to direct air away from the eyes of the user. The air chamber (6) forms an air duct (12) that substantially covers the top of the hood (1) above the user's head. The duct (12) is collapse-resistant so that the duct shape is maintained in use and air flow through the duct (12) is substantially unrestricted. As a result, a substantially uniform air flow can be achieved in use, which air flow pattern is repeatable from day to day and from hood to hood.