A cushioning device for a body support such as a mattress, seat, sofa, or the like where support is obtained from a fluid. The cushioning device is self-inflating, self-adjusting, and provides a low interface pressure under the entire contact surface of a patient. Shear force scraping damage is prevented...http://www.google.com.au/patents/US20030208849?utm_source=gb-gplus-sharePatent US20030208849 - Inflatable cushioning device with manifold system
