Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Reexamination Certificate
1999-02-16
2004-06-08
Lewis, Aaron J. (Department: 3761)
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
C222S096000, C222S540000, C137S843000, C137S844000, C137S850000, C137S859000
Reexamination Certificate
active
06745763
ABSTRACT:
TECHNICAL FIELD
The invention relates to the field of devices for administering medicated liquids, and more particularly to vaporizers.
BACKGROUND ART
It is common to us vaporizers or atomizers for delivering certain medicines to humans, such as asthma medication. Many medications can be effectively delivered into the bloodstream by inhalation through the lungs. However, many medications, such as insulin, must be delivered in sterile form, which precludes the use of existing vaporizers, in which the medication passes through unsterilized passages, including the vaporizer itself. There is therefore a need for a vaporizer which can administer sterile medications.
DISCLOSURE OF INVENTION
The invention therefore provides a device for dispensing a vaporized spray of sterile medicated liquid, comprising a housing for containing a supply of sterile medicated liquid, means for pressurizing the liquid, and a combination atomizing and pressure release valve.
The invention also provides a combination atomizing and pressure release valve comprising a layer of flexible material provided with an aperture, and a plug extending through the aperture and having a surface against which the layer of flexible material is biased in the closed position, the layer lifting off the surface of the plug in the open position to thereby open the aperture.
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A copy of the International Search Report dated Feb. 25, 2000.
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Lewis Aaron J.
Weiss, Jr. Joseph F.
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