A deployable flexible walled enclosure for housing people in the event of a serious air quality degradation is provided. A pressurized enclosure, either stored in a permanent location or transportable to a selected site, includes an air supply system for filtering and subsequently supplying ...http://www.google.com.au/patents/US5706846?utm_source=gb-gplus-sharePatent US5706846 - Protective action system including a deployable system
