Abstract: A system and method for controlling the flow of fluid for an inflatable body support 30 system, such as a mattress, having multiple, inflatable chambers. Each inflatable chamber can be selectively and independently inflated and deflated to vary the pressure exerted from the mattress surface to selected areas of a human body, thereby preventing the formation of decubitus ulcers. The system includes a valve assembly that includes a plurality of solenoid valves to direct air at a pressure of less than 1 pound per square inch into each chamber and a separate vent valve all operable by a controller to regulate the level of inflation of each inflatable chamber.

Abstract: A system and method for controlling the flow of fluid for an inflatable mattress having multiple, non-interconnected inflatable chambers. Each inflatable chamber can be selectively inflated and deflated to vary the pressure exerted from the mattress surface to selected areas of a human body, thereby preventing the formation of decubitus ulcers.