Abstract: A closed loop feeback-controlled air supply system for air support convalescent beds having groups of air sacs for supporting various body sections of a patient. The air supply system may be self-contained with its own air supply compressor or it may utilize any other source of compressed air. The air supply is coupled with a distributor manifold from which extends a plurality of air supply lines extending to selected groups of air sacs. Servo valves controlling each of the air supply lines are automatically positioned and controlled by signals from a microprocessor, the microprocessor receiving pressure feedback monitoring signals from pressure transducers associated with each of the groups of air sacs. Between the air supply and the manifold may be provided a master control valve which may be a servo valve also activated and controlled by the microprocessor responsive to feedback signals.

Abstract: A closed loop feedback-controlled air supply system for air support convalescent beds having groups of air sacs for supporting various body sections of a patient. The air supply system may be self-contained with its own air supply compressor or it may utilize any other source of compressed air. The air supply is coupled with a distributor manifold from which extends a plurality of air supply lines extending to selected groups of air sacs. Servo valves controlling each of the air supply lines are automatically positioned and controlled by signals from a microprocessor, the microprocessor receiving pressure feedback monitoring signals from pressure transducers associated with each of the groups of air sacs. Between the air supply and the manifold may be provided a master control valve which may be a servo valve also activated and controlled by the microprocessor responsive to feedback signals.

Abstract: Fluidized hospital bed is provided incorporating a segmented, adjustable patient support structure having a plurality of flexible air impervious air bags releasably secured thereto. An air supply is provided for maintaining controllable inflation of selected groups of the air bags with air pressure therein being selectively and automatically adjustable for patient comfort and for emergency patient care. Each of the air bags has a single air inlet in communication with the air supply and multiple air vent holes along the upper side portions thereof or ventilation, patient heating or cooling and removal of moisture. Convex upper surface portions of the air bags facilitate support of the patient without wrapping of air bag material about the patient. The fluidized hospital bed system is powered electrically with both AC and DC current, enabling battery overide in the event of failure of the AC power supply.