Abstract: A controller controlling zones of a multi-zone pneumatic mattress comprises a plurality of variable pressure reducing valves, and may be either manually operated, and includes plug-in connectors for removal connection to plural air circuits of the mattress. A single master control can operate the variable pressure reducing valves simultaneously.

Abstract: A hospital bed has an inclinable backrest, a pneumatic mattress, and an automatically acting mechanical air pressure control for the mattress. The pressure control includes a gravity responsive valve between the backrest and another zone of the mattress. A weighted mass in the pressure control urges the valve to move to a desired position and may counter a biasing member acting on the valve. The weighted mass may prevail against the biasing member when the backrest is upright but may yield to the biasing member when the backrest has been lowered. With the backrest upright, pneumatic cells of the backrest may be isolated from the other zone of the mattress. With an air source arranged to inflate the other zone, that portion of the mattress exposed to greater weight of a patient, as would occur with the backrest upright, enjoys increased air pressure.

Abstract: The technical solution relates to a mattress for a hospital bed, e.g.: to a therapeutic inflatable mattress and to the improvement of the control system with the help of a detection system comprising a contact member and a valve for optimizing the air pressure in response to the weight distribution and position of the patient on the mattress.

Abstract: The technical solution relates to a mattress for a hospital bed, e.g.: to a therapeutic inflatable mattress and to the improvement of the control system with the help of a detection system comprising a contact member and a valve for optimizing the air pressure in response to the weight distribution and position of the patient on the mattress.