Metered dose dispensing aerosol valve

a technology of aerosol valve and metered dose, which is applied in the directions of liquid dispensing, packaging, transportation and packaging, etc., can solve the problems of preventing the passage of sedimented material out of the metering chamber, loss of prime, and loss of drug substance from the metering chamber

Inactive Publication Date: 2002-06-27
KINDEVA DRUG DELIVERY LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Loss of prime occurs when vapour or air gets trapped in the metering chamber.
Drug substance may be lost from the metering chamber due to the ability of the active substance to migrate into and out of the metering chamber during the storage period.
However, this arrangement would not prevent passage of sedimented material out of the metering

Method used

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  • Metered dose dispensing aerosol valve
  • Metered dose dispensing aerosol valve
  • Metered dose dispensing aerosol valve

Examples

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Embodiment Construction

[0014] The invention will now be described with reference to the accompanying drawings in which:

[0015] FIG. 1 represents a cross-section through a metered dose dispensing aerosol valve in accordance with the invention,

[0016] FIG. 2 represents a cross-section through a further metered dose dispensing aerosol valve in accordance with the invention,

[0017] FIGS. 3a and 3b represent cross-sections through part of a metering chamber and valve stem suitable for use in a valve in accordance with the invention,

[0018] FIG. 4 represents a cross-section through part of a metering chamber and valve stem suitable for use in a valve in accordance with the invention,

[0019] FIGS. 5a and 5b represent a cross-section and end view of a portion of a metering chamber and valve stem suitable for use in a valve in accordance with the invention,

[0020] FIGS. 6a and 6b represent a cross-section and end view of a portion of a metering chamber and valve stem suitable for use in a valve in accordance with the in...

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PUM

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Abstract

A metered dose aerosol valve that minimizes loss of prime and loss of drug dose by having a one-way valve mechanism positioned toward the end of a transfer passage that allows drug substance to pass from the aerosol container into the metering chamber, but not back.

Description

[0001] This application claims priority to U.S. provisional application No. 60 / 221421, filed Jul. 28, 2000.[0002] This invention relates to metered dose dispensing aerosol valves and in particular to metered dose dispensing valves suitable for use with metered dose inhalers.BACKGROUND TO THE INVENTION[0003] Conventional metering valves for use with pressurised dispensing containers comprise a valve stem co-axially slidable within a valve member defining an annular metering chamber and outer (diaphragm) and inner (tank) annular seals co-operative between the respective outer and inner ends of the valve stem and the valve member to seal the metering chamber therebetween. The valve stem is movable between a non-dispensing position in which the metering chamber is connected to the container and charged with product therefrom. The valve stem is movable, generally against the action of a spring, to a dispensing position where the metering chamber is isolated from the container and vented ...

Claims

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Application Information

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IPC IPC(8): B65D83/14
CPCB65D83/54
Inventor JINKS, PHILIP A.
Owner KINDEVA DRUG DELIVERY LP
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