An apparatus is provided to support a mattress. The apparatus includes a base platform that is formed to rest on a box spring and to include slots therethrough, a plate hinged to the base platform, and a bladder fastened between the plate and the base platform. In addition, the apparatus includes a fastener...http://www.google.de/patents/US6012186?utm_source=gb-gplus-sharePatent US6012186 - Mattress articulation structure
