PRESSURE CONTROL SYSTEM IN PNEUMATIC MASSAGE DEVICE SECTIONS Russian patent published in 1995 - IPC

FIELD: medical engineering. SUBSTANCE: device has comparator, pressure difference control unit. Pressure former, pressure pickup, amplifying former, matching device, pressure controller are mounted in the control channel of each section. Pressure pickup outputs are connected to the comparator through the corresponding amplifying former, and the pressure controller outputs are connected to the comparator through the pressure difference control unit. The comparator outputs are connected to the corresponding matching device. Pressure former outputs are connected to the pneumatic massage device sections through the sequential switch on/off units. The pressure former is a chamber having three nozzles and piezoceramic cantilever with a lever mounted in perpendicular. One lever arm is positioned between the two above mentioned nozzles, one of them communicating to the overpressure source and the second one being connected with the corresponding pneumatic massage device section. The other lever arm is positioned near the ejecting nozzle. A check valve is mounted into the chamber wall in front of the ejecting nozzle. The system has amplitude analyzer mounted on the output of amplifying formers and having outputs connected to OR-gate, which is connected to a revolution number control engine through a comparator, the control engine being connected to the compressor drive. EFFECT: provided control over air supply and pressure level corresponding to a selected mode of massage. 3 cl, 2 dwg