A rucksack is provided with a disaster-protection hood attached to the rucksack body. When not in use the hood is folded away in a strip between the rucksack body and the hood. A gas charging apparatus with a compressed carbon dioxide cylinder when operated, inflates the hood to form a disaster-protection...http://www.google.es/patents/US5946729?utm_source=gb-gplus-sharePatente US5946729 - Rucksack with disaster-protection hood
