Dispensing device
AssigneePfizer Inc.
InventorsPeter J. Houzego, John Kelshaw Conway, Martin Douglas Pearl, Andrew Mark Bryant
Life of this patent
Estimating the term…
Abstract
A device for dispensing individual doses of powder from respective pockets of a disc-shaped carrier by outwardly rupturing a lidding foil by means of pressure on an opposite side surface, the device providing individual respective deaggregation flow paths for each pocket, split airstreams allowing improved entrainment of powder, a cam mechanism for outwardly rupturing the pockets, an indexing mechanism linked to the cam mechanism and a dose counter.
Claims21
A device for dispensing individual doses of powder from respective pockets of a carrier, the device including:
- a support for a carrier having a plurality of pockets containing respective doses of powder;
- and a mouthpiece through which to inhale an airstream carrying a dose of powder;
- the device further including:
- walls for defining individual respective first flow paths downstream of each respective pocket of a supported carrier wherein each individual respective first flow path is defined entirely by respective walls unique to that individual respective first flow path, is for connecting the corresponding respective pocket to the mouthpiece and is for deaggregating powder in the airstream.
A device for dispensing individual doses of powder from respective pockets of a carrier, the device including:
- a support for a carrier having a plurality of pockets containing respective doses of powder;
- and a mouthpiece through which to inhale an airstream carrying a dose of powder;
- the device further including:
- walls for defining individual respective first flow paths downstream of each pocket of a supported carrier for connecting the pockets to the mouthpiece and deaggregating powder in the airstream;
- and an arrangement for moving individually each pocket from a respective storage position to a respective discharge position, wherein each pocket, in the respective discharge position, forms an integral part of the individual respective first flow path.
(canceled)
A device for dispensing individual doses of powder from respective pockets of a pair of carriers, the device including:
- a support for two disc shaped carriers, each disc shaped carrier having at least one substantially planar first side surface having an annular array of cavities in which respective pockets are formed and a respective first lidding sheet sealed to the first side surface for enclosing the cavities, wherein the supports are for rotatably supporting the carriers about a substantially common axis;
- a mouthpiece through which to inhale an airstream carrying powder from the carriers;
- a dispensing mechanism for releasing into the airstream the powder of a respective pocket of a supported carrier;
- and an indexing mechanism for rotating the carriers relative to the dispensing mechanism so as to enable powder to be released from different pockets.
-53. (canceled)
Dependencies are inferred from the claim text.