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Metering valve for a metered dose inhaler having improved flow

  • US 20030010794A1
  • Filed: 05/14/2002
  • Published: 01/16/2003
  • Est. Priority Date: 06/22/2001
  • Status: Abandoned Application
First Claim
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1. An aerosol metering valve comprising:

  • a body wall defining an internal chamber and comprising a metering gasket and a diaphragm, the diaphragm having walls defining an aperture;

    a valve stem comprising a body portion and a stem portion, the body portion comprising a bottom edge and being positioned in the internal chamber of the metering valve, the stem portion comprising a discharge outlet and passing through the aperture in slidable, sealing engagement with the diaphragm;

    an annular gap comprising an inlet and having a length of about 3.2 mm or less, wherein the length of the annular gap is defined by the distance from the bottom edge of the body portion of the valve stem to the inlet; and

    a flow path providing at least transient fluid communication between the internal chamber and the annular gap through the inlet.

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