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.
Claims7
A device for dispensing individual doses of powder from respective pockets of a carrier, the device including:
- an indexing mechanism for indexing the carrier between respective pockets, from an opened pocket to an unopened pocket;
- a first counter ring having an indication of unit counts on a first display surface, the first counter ring being rotatable about a counter axis;
- a second counter ring having an indication of tens counts on a second display surface, the second counter ring being rotatable about the counter axis;
- and an intermittent-motion mechanism for driving the second counter ring from the first counter ring and rotating the second counter ring between consecutive tens counts when the first counter ring rotates between two predetermined consecutive unit counts, the first counter ring being driven with the indexing mechanism,
- wherein the first display surface and the second display surface are planar and perpendicular to the counter axis.
A device for dispensing individual doses of powder from respective pockets of a carrier, the device including:
- an indexing mechanism for indexing the carrier between respective pockets, from an opened pocket to an unopened pocket;
- a first counter ring having an indication of unit counts on a first display surface, the first counter ring being rotatable about a counter axis;
- a second counter ring having an indication of tens counts on a second display surface, the second counter ring being rotatable about the counter axis;
- and a mechanism for rotating the second counter ring between consecutive tens counts when the first counter ring rotates between two predetermined consecutive unit counts, the first counter ring being driven with the indexing mechanism;
- wherein the first and second counter rings are positioned one within the other, with the first and second display surfaces adjacent each other,
- wherein the first display surface and the second display surface are planar and perpendicular to the counter axis.
Dependencies are inferred from the claim text.