An inflatable air bed. The air bed includes an inflatable lower chamber and an inflatable upper chamber overlying and attached to the lower chamber. Each chamber includes at least one valve for inflating and deflating the chamber. The lower chamber provides support for the upper chamber, which can be...http://www.google.fr/patents/US5598593?utm_source=gb-gplus-shareBrevet US5598593 - Inflatable air bed
