Atomizing devices and methods

Details Atomizing devices and methods Atomizing devices and methods

1995-06-02

1997-09-02

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Including supply holder for material

Follower in holder

2223211, 2223218, 2223831, 222384, A61M 1100, B05B 1100

Patent

active

056622716

ABSTRACT:
A metered dose inhaler comprises a piston which is mounted in a cavity within a body, and is urged by a pre-loaded spring into a reduced cross-section pressure chamber. The piston may be loaded by means of an actuating rod having a handle, and may be latched in a loaded position by a latching means. A liquid drug (e.g. in aqueous solution) is contained in a collapsible bag. Metered quantities of the drug are successively presented in the pressure chamber, and then subjected to a sudden and great increase in pressure, to eject the liquid drug through an atomising head, to reduce it to fine atomised spray of small mean particle size--for example less than 30 micrometers. Non-return valves control the flow of liquid through the device. The sudden pressure pulse is caused be releasing the spring loaded piston, upon depressing an actuating button connected by the latching means.

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