Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1997-08-25
1999-07-20
Asher, Kimberly L.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820312, 12820321, A61M 1500
Patent
active
059244178
ABSTRACT:
A metering device, for use in transferring a desired volumetric dose of a flowable substance from a storage chamber containing the flowable substance to a location outside the storage chamber, is disclosed. An outlet conduit is arranged between the storage chamber and the location to which the dose is to be transferred. The metering device is of such size and shape as to be able to pass through the outlet conduit and includes first and second end element which, when the metering device is located inside the outlet conduit, are in a sealing engagement with the inner walls of the outlet conduit. The shape of the metering device between the first and second end elements is such that a space of the desired dose volume is defined between the first and second end elements and the intervening section of the inner walls of the outlet conduit, in which space the flowable substance from the storage chamber may be enclosed. The metering device is of particular use in a dry powder inhaler.
REFERENCES:
patent: 1858735 (1932-05-01), Goodsell
patent: 2587215 (1952-02-01), Priestly
patent: 3008609 (1961-11-01), Sessions
patent: 4627432 (1986-12-01), Newell et al.
patent: 4635829 (1987-01-01), Brittingham, Jr.
patent: 5154326 (1992-10-01), Chang et al.
Asher Kimberly L.
Innovata Biomed Limited
Schindler Edwin D.
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