Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Reexamination Certificate
1999-01-21
2001-12-04
Dawson, Glenn K. (Department: 3761)
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
C128S203120
Reexamination Certificate
active
06325063
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to devices for administering medicaments or the like by inhalation.
BACKGROUND OF THE INVENTION
Conventional devices for administering a medicament or the like in the form of an aerosol or powder typically comprise atomizers or nebulizers. The medicaments contained in such devices are typically in admixture with a propellant such that, when a release valve in the device is opened, the propellant and medicament are forced out of the device in the form of a mist.
Such devices containing propellants are disadvantageous in that they typically provide a small number of doses, are fairly bulky, and require the user of the device to synchronize his or her inhalation with the opening of the release valve.
SUMMARY OF THE INVENTION
To overcome the above disadvantages of conventional inhalation devices, the present invention provides a breath-powered mist inhaler in which the force required to atomize or nebulize the medicament is provided by inhalation of the person using the device.
In one aspect, the present invention provides a breath-powered device for inhalation of a substance, comprising a hollow body having a first end and a second end and having a continuous air passage extending from the first end to the second end; an air inlet provided at the first end of the hollow body; an air outlet provided at the second end of the hollow body, the air passage decreasing in size between the air inlet and the air outlet; storage means for storing the substance; and a releasing mechanism from which the substance is released into the air passage, the releasing mechanism being impregnated with the substance and being located in the air passage proximate the air outlet.
Therefore, it is an object of the present invention to provide a breath-powered inhalation device.
REFERENCES:
patent: 351744 (1886-11-01), Cushman
patent: 413100 (1889-10-01), Smith
patent: 418813 (1890-01-01), McQuigg
patent: 544340 (1895-08-01), Wright
patent: 813425 (1906-02-01), Hill
patent: 957548 (1910-05-01), Doane
patent: 5655517 (1997-08-01), Coffee
patent: 5727546 (1998-03-01), Clark et al.
Dawson Glenn K.
Riches, McKenzie & Herbert
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