Description: A cushioning device for a body support such as a mattress, seat, sofa, or the like where support is obtained from a fluid in fluid cells having a spring bias. 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 by a sleeve apparatus. A support system apparatus provides separately adjustable pressure support zones. For physical therapy, an alternating pressure system provides alternating lifting and lowering pressure zones under a patient.
Patent Details: https://www.google.com/patents/US20050125905?dq=US+2005-0125905+A1&hl=en&sa=X&ved=0CB4Q6AEwAGoVChMInq-D64yYxwIVgZqICh252AV6