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Claims for Patent: 9,333,310

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Claims for Patent: 9,333,310

Title:Medicament dispenser
Abstract: A sheet driver for use in a medicament dispenser with blister pockets includes: (a) a base, extending from the base, (b) a shaft defining a rotational axis; at the base, (c) a drive surface for receipt of drive to rotate the base about the rotational axis; about the shaft, (d) a torsion spring defining first and second spring legs; mounting about the shaft and the torsion spring for rotation about the rotational axis, and (e) a hub defining a hub surface for receipt of a sheet of the medicament carrier, the hub surface being adapted to provide an initial effective winding surface which provides uniform indexing of the medicament carrier.
Inventor(s): Jones; Christopher John (Warwick, GB), May; James John (Warwick, GB), Lintell; Daniel Thomas De Sausmarez (Ware, GB), Palmer; Mark Gregory (Ware, GB), Tansley; Robert William (Bidford on Avon, GB)
Assignee: Glaxo Group Limited (Brentford, Middlesex, GB)
Application Number:13/483,168
Patent Claims: 1. A sheet driver for use in a medicament dispenser including a medicament carrier having a plurality of pockets for containing medicament wherein said pockets are spaced along a length of and defined between first and second sheets secured to each other and separable by drivable pulling action, said sheet driver comprising (a) a base; (b) extending from said base, a shaft defining a rotational axis; (c) at said base, a drive surface for receipt of drive to rotate the base about said rotational axis; (d) about said shaft, a torsion spring defining first and second spring legs; (e) mounted about the shaft and said torsion spring for rotation about the rotational axis, a hub defining a hub surface for receipt of at least one of the first or second sheets of said medicament carrier, wherein a first leg receiver of the base receives said first spring leg of the torsion spring and a second leg receiver of said hub receives said second spring leg of the torsion spring such that relative rotation of the base and the hub results in tensioning of the torsion spring, wherein the hub surface is adapted to provide an initial effective winding surface, and the tensioning of the torsion spring compensates for an increase in the effective winding surface of the hub caused by receipt of said at least one of the first or second sheets of said medicament carrier about the hub, and wherein the hub is mounted to the base with the torsion spring wound to an initial tensed state and the hub and the base are configured so that the torsion spring is unable to unwind from this initial tensed state.

2. A sheet driver according to claim 1, wherein the base is of essentially circular form.

3. A sheet driver according to claim 1, wherein the shaft is integral with the base.

4. A sheet driver according to claim 1, wherein the drive surface defines a gearing surface.

5. A sheet driver according to claim 1, wherein the drive surface extends circumferentially about the base.

6. A sheet driver according to claim 1, wherein the drive surface is integral with the base.

7. A sheet driver according to claim 6, wherein the base defines a rim and the drive surface is provided to said rim.

8. A sheet driver according to claim 1, wherein the first and second spring legs protrude from first and second ends of the spring.

9. A sheet driver according to claim 1 wherein the hub fits over the torsion spring and shaft.

10. A sheet driver according to claim 1, wherein the hub is provided with a hook, peg, notch, or slot, for engaging an end of at least one of the first or second sheets.

11. A sheet driver according to claim 10, wherein the hook, peg, notch, or slot is for engaged receipt of a looped end of a sheet.

12. A medicament dispenser for use with a medicament carrier having a plurality of pockets for containing medicament wherein said pockets are spaced along a length of and defined between first and second sheets secured to each other and separable by drivable pulling action, said dispenser having an internal dispensing mechanism for accessing said medicament contained within said medicament carrier, said mechanism comprising, a) an opening station for receiving a pocket of said medicament carrier; b) a peeler positioned to engage a base sheet and a lid sheet of a pocket which has been received in said opening station for peeling apart said base sheet and lid sheet, to open said pocket received in said opening station, said peeler including a sheet driver according to claim 1 for pulling apart a lid sheet and a base sheet of a pocket that has been received at said opening station; c) an outlet, positioned to be in communication with an opened pocket through which a user can remove medicament from said opened pocket; and d) indexer for indexing in communication with said outlet, pockets of a medicament carrier in use with said medicament dispenser, said indexer being interconnected with said sheet driver such that movement of one correlates with the movement of the other.

13. A medicament dispenser according to claim 12, wherein the indexer comprises a rotatable index wheel having pocket receiving recesses therein.

14. A medicament dispenser according to claim 12, additionally comprising an indexing lever for actuating the indexer and sheet driver.

15. A medicament dispenser according to claim 12, wherein the indexer couples to a movable cover provided to the dispenser such that movement of the cover results in movement of the indexer.

16. A medicament dispenser according to claim 12, comprising at least one medicament carrier having a plurality of pockets containing medicament wherein said pockets are spaced along a length of and defined between first and second sheets secured to each other and separable by drivable pulling action.

17. A medicament dispenser according to claim 16, wherein said at least one medicament carrier comprises a lid sheet which is hermetically sealed to a base sheet except in a region of the pockets such that said lid sheet and base sheet can be peeled apart by said drivable pulling action.

18. A medicament dispenser according to claim 16, wherein a leading end of either the base or lid sheet or is looped for receipt by the hub.

19. A medicament dispenser according to claim 16 adapted to prevent the sheet driver unwinding.

20. A medicament dispenser according to claim 16, wherein the medicament is selected from the group consisting of albuterol, salmeterol, fluticasone propionate, beclomethasone dipropionate, salts thereof, solvates thereof and combinations thereof.

21. A medicament dispenser according to claim 16, wherein the medicament comprises a combination which comprises salmeterol xinafoate and fluticasone propionate.

22. A medicament dispenser according to claim 21, wherein the medicament additionally comprises an excipient.

23. A medicament dispenser for use with plural medicament carriers, each having a plurality of pockets for containing medicament wherein said pockets are spaced along a length of and defined between first and second sheets secured to each other and separable by drivable pulling action, said dispenser having an internal dispensing mechanism for accessing said medicament contained within each of said plural medicament carriers, said mechanism comprising, a) an opening station for receiving a pocket of each of said plural medicament carriers; b) a peeler positioned to engage a base sheet and a lid sheet of a pocket which has been received in said opening station for peeling apart said base sheet and lid sheet, to open said pocket received in said opening station, said peeler including a sheet driver as according to claim 1 for pulling apart a lid sheet and a base sheet of a pocket that has been received at said opening station; c) an outlet, positioned to be in communication with an opened pocket through which a user can remove medicament from said opened pocket; and d) an indexer for indexing in communication with said outlet, pockets of each of said plural medicament carriers in use with said medicament dispenser, said indexer being interconnected with said sheet driver such that movement of one correlates with the movement of the other.
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