Air powered source for cooled breathable air

摘要: A breathing apparatus is provided which delivers cool, air conditioned to a remote location as much 100 feet away from the proper. The unit powered by an motor operable industrial compressed tank, and oil-less pump driven elevate pressure of fresh adequately for delivery. Cooling both drive respirable radiators, final cooling stage incorporated heat exchanger cools spent air, latter having reached very low temperature due rapid expansion it passes through motor. After compressor used first then cool breathable yet third time in preferred embodiment transmitting with hermetically separate envelope so that virtually all energy initially compress recouped greatest extent physically possible.