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US 6,640,805 B2Granted
Metering valve for a metered dose inhaler having improved flow
Assignee3M Innovative Properties Company
InventorsGustavo H. Castro, Thomas Herdtle, Cathleen M. Arsenault, Antony J. Davis
Life of this patent
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Abstract
A novel metering valve having improved flow for delivery of an aerosol formulation is disclosed. Methods of delivering an aerosol formulation using a device comprising the novel metering valve are also disclosed.
Claims30
An aerosol valve stem comprising:
- a body comprising a body wall defining an internal chamber;
- at least one inlet port through the body wall in fluid communication with the internal chamber;
- a channel opening in the body wall having a height and a width wherein the width is greater than the height;
- and
- at least one channel providing fluid communication between the internal chamber and the channel opening.
2 more elements
An aerosol valve stem comprising:
- a body comprising a body wall defining an internal chamber;
- at least one inlet port through the body wall in fluid communication with the internal chamber;
- a plurality of channel openings in the body wall, each channel opening having a height and a width wherein at least two channel openings define a cumulative width, and wherein the cumulative width is greater than the height;
- and
- at least one channel providing fluid communication between the internal chamber and each channel opening.
2 more elements
A method of delivering an aerosol dose of medicine comprising:
- a) providing an inhaler that comprises a valve stem comprising:
- i) a body comprising a body wall defining an internal chamber,
- ii) at least one inlet port through the body wall in fluid communication with the internal chamber,
- iii) a channel opening in the body wall having a height and a width wherein the width is greater than the height, and
- iv) at least one channel providing fluid communication between the internal chamber and the channel opening;
- b) providing a formulation of aerosol medicine contained within the inhaler;
- and
- c) actuating the inhaler.
5 more elements
A method of delivering an aerosol dose of medicine comprising:
- a) providing an inhaler that comprises a valve stem comprising:
- i) a body comprising a body wall defining an internal chamber,
- ii) at least one inlet port through the body wall in fluid communication with the internal chamber,
- iii) a plurality of channel openings in the body wall, each channel opening having a height and a width wherein at least two channel openings define an cumulative width, and wherein the cumulative width is greater than the height, and
- iv) at least one channel providing fluid communication between the internal chamber and each channel opening;
- b) providing a formulation of aerosol medicine contained within the inhaler;
- and
- c) actuating the inhaler.
5 more elements
A metering valve comprising:
- a housing comprising an internal chamber defined by one or more chamber walls, the internal chamber comprising an outlet aperture;
- a diaphragm positioned at the outlet aperture and in sealing engagement with at least a portion of the housing;
- a metering gasket in sealing engagement with one or more chamber walls;
- a valve stem comprising:
- i) a body comprising a body wall defining an internal chamber,
- ii) at least one inlet port through the body wall in fluid communication with the internal chamber,
- iii) a channel opening in the body wall having a height and a width wherein the width is greater than the height, and
- iv) at least one channel providing fluid communication between the internal chamber and the channel opening,
- wherein the valve stem passes through the aperture in slidable sealing engagement with both of the diaphragm and the metering gasket;
- and
- an annular space having a width defined by a distance between the chamber wall and the valve stem.
8 more elements
A metering valve comprising:
- a housing comprising an internal chamber defined by one or more chamber walls, the internal chamber comprising an outlet aperture;
- a diaphragm positioned at the outlet aperture and in sealing engagement with at least a portion of the housing;
- a metering gasket in sealing engagement with one or more chamber walls;
- a valve stem comprising:
- i) a body comprising a body wall defining an internal chamber,
- ii) at least one inlet port through the body wall in fluid communication with the internal chamber,
- iii) a plurality channel openings in the body wall, each channel opening having a height and a width wherein at least two channel openings define a cumulative width, and wherein the cumulative width is greater than the height;
- and
- iv) at least one channel providing fluid communication between the internal chamber and each channel opening,
- wherein the valve stem passes through the aperture in slidable sealing engagement with both of the diaphragm and the metering gasket;
- and
- an annular space having a width defined by a distance between the chamber wall and the valve stem.
9 more elements
Dependencies are inferred from the claim text.