A support apparatus includes a base, a frame coupled to the base, and a mattress supported by the frame. The apparatus also includes a coupler for coupling a power pack to one of the base, the frame and the mattress. The mattress includes a plurality of bladder pairs each having a first bladder and a...http://www.google.es/patents/US20050097675?utm_source=gb-gplus-sharePatente US20050097675 - Surgical table
