Atomising devices and methods
Patent 5497944 Issued on March 12, 1996. Estimated Expiration Date: 
March 12, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 12, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 938174 filed on 11/19/1992US Classes:239/321, Floating or biased piston128/200.14, LIQUID MEDICAMENT ATOMIZER OR SPRAYER128/200.22, Gas flow induced by expansion chamber device (e.g., piston/cylinder ram, squeeze bulb, etc.)128/203.12, Means for mixing treating agent with respiratory gas222/321.1, With material supply container and discharge assistant casing222/321.8, With relatively movable actuator222/383.1, Container-mounted pump222/384With piston holding meansExaminersPrimary: Kashnikow, AndresAttorney, Agent or FirmForeign Patent References
International ClassesA61M 011/00B05B 011/00 Foreign Application Priority Data1990-03-21 GBAbstractA metered dose inhaler for dispensing a fluid medicament as droplets of small mean particle size without the use of pressurized gas or liquefied propellants. A liquid drug is contained in a fluid reservoir, and metered quantities of the drug are successively presented into a reduced cross-section pressure chamber, with non-return valves controlling the flow of liquid through the device. The metered quantity of the drug is then subjected to a sudden and great increase in pressure by releasing a piston into the pressure chamber. The liquid drug is thereby ejected through an atomizing head, to reduce it to a fine atomized spray of small mean particle size, preferably less than approximately 12 micrometers.Other References
Field of SearchFloating or biased pistonDeflector and terminal flow element Transverse planar or dished surface type ONE FLUID STREAM IMPINGES UPON ANOTHER (I.E., CONVERGING) Orifices in recessed face With piston holding means For reciprocating piston on follower-type impeller Biasing means within material chamber or passage Slidable indicator element projecting from container With material supply container and discharge assistant casing Aligned discharge assistant, actuator, container and nozzle Container-mounted pump With relatively movable actuator Pump casing within supply container Container-mounted pump With precompression | |
