The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 04, 2004
Filed:
Mar. 18, 2002
Bernhard Ludwig, Lübeck, DE;
Tilmann von Blumenthal, Lübeck, DE;
Ralf Lorenzen, Lübeck, DE;
Dräger Medical AG & Co. KGaA, Lübeck, DE;
Abstract
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 ( ).