Dr&auml;ger Medical Ag & Co. Kgaa

Tilmann Von Blumenthal

Ralf Lorenzen

Bernhard Ludwig

A valve arrangement is provided with a very short minimum valve adjustment time. This is especially suitable for use in respirators or anesthesia apparatuses for metering gases for respirated patients. It has a valve ( ) with a seat ( ) and with a valve closing part ( ) for adjusting the gas flow rate, an inflow line ( ) and a discharge line ( ) as well as a drive system ( ) for controlling the position of the valve closing part ( ) relative to the seat ( ). A gas flow rate measuring transducer ( ) and a control unit ( ) are provided for controlling the drive system ( ) by means of a control signal. A velocity measuring transducer ( ) for measuring the velocity of the valve closing means ( ) relative to the seat ( ) is present to provide an output signal used to calculate the control signal ( ) for the drive system ( ).

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Lübeck, Germany

Tilmann Von Blumenthal