DOSE SETTING MECHANISM FOR PRIMING A DRUG DELIVERY DEVICE

• US 20100324496A1
• Filed: 05/27/2010
• Published: 12/23/2010
• Est. Priority Date: 06/01/2009
• Status: Active Grant

• Current Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Original Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Inventors: VEASEY, Robert Frederick, DAVIES, James Alexander, JONES, Christopher John, PLUMPTRE, David Aubrey
• Granted Patent: US 9,950,116 B2
• Time in Patent Office: Days
• US Class Current: 604/207
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/2488 via rotation, e.g. threads or bayonet
• CPC Class Codes: A61M 2005/2492 via snap connection
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/3129 Syringe barrels A61M5/3205 and A61M5/50 take precedence
• CPC Class Codes: A61M 5/3146 Priming, e.g. purging, reducing backlash or clearance
• CPC Class Codes: A61M 5/31525 Dosing burettes, pipettes B01L3/02
• CPC Class Codes: A61M 5/31543 piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change
• CPC Class Codes: A61M 5/31551 including axial movement of dose setting member

Abstract

A method and system for providing a drug delivery device. The drug delivery device comprises a dose setting mechanism comprising a spindle and a cartridge holder coupled to the dose setting mechanism. The cartridge holder comprising a cartridge having a movable bung at one end of the cartridge. The cartridge holder must be rotated before a dose may set with the dose setting mechanism.

Claims

1. A drug delivery device, said drug delivery device comprising:

a dose setting mechanism comprising a spindle; and

a cartridge holder coupled to said dose setting mechanism,

said cartridge holder comprising a cartridge having a movable bung at one end of said cartridge;

wherein said cartridge holder must be rotated before a dose may be set with said dose setting mechanism.

2. The invention of claim 1 wherein said cartridge holder must be rotated with respect to said dose setting mechanism before said dose may be set with said dose setting mechanism.

3. The invention of claim 1 wherein rotation of said cartridge holder primes said drug delivery device.

4. The invention of claim 1 wherein rotation of said cartridge holder moves said spindle into an abutting engagement with said bung of said cartridge.

5. The invention of claim 1 wherein rotation of said cartridge holder enables a dose dial sleeve of said dose setting mechanism to rotate.

6. The invention of claim 5 wherein rotation of said dose dial sleeve allows a user of said dose setting mechanism to set said dose.

7. The invention of claim 1 wherein after said cartridge holder is rotated, said cartridge holder is rotationally locked to said dose setting mechanism.

8. The invention of claim 7 wherein after said cartridge holder is rotated, said cartridge holder is rotationally locked to said dose setting mechanism by way of a one way, non-return detent feature.

9. The invention of claim 1 wherein said cartridge holder provides a visual indication that said cartridge holder must be rotated before said dose may be set by said dose setting mechanism.

10. The invention of claim 1 wherein said drug delivery device is a resettable drug delivery device.

11. The invention of claim 1 wherein said drug delivery device is not a resettable drug delivery device.

12. The invention of claim 1 wherein said cartridge holder must be rotated less than 360 degrees before a dose may be set with said dose setting mechanism.

13. A priming mechanism for a drug delivery device, said priming mechanism comprising:

a dose setting mechanism comprising

a spindle; and

a dose dial sleeve;

a cartridge holder, said cartridge holder comprising a cartridge, said cartridge comprising a movable bung near a proximal end of said cartridge;

a coupling part connecting said cartridge holder to said dose dial sleeve of said dose setting mechanism, and

a spindle nut rotationally coupled to said coupling part, said spindle nut coupling said cartridge holder to said spindle of said dose setting mechanism;

such that when said cartridge holder is rotated with respect to said dose setting mechanism,

said spindle nut is rotated and moves said spindle into an abutting engagement with said bung.

14. The invention of claim 13 wherein said coupling part unlocks said dose dial sleeve so that said dose dial sleeve may be rotated to set a dose.

15. The invention of claim 13 wherein said coupling part comprises a thin metal pressing.

16. The invention of claim 13 wherein said coupling part comprises a rigid coupling component (Ok).

17. The invention of claim 13 wherein said dose setting mechanism comprises at least one flexible locking element, wherein when said cartridge holder is rotated, said coupling part also rotates to thereby release said flexible locking element and allowing said dose dial sleeve to rotate and allow a user of said medical delivery device to set a dose.

18. The invention of claim 13 wherein said spindle nut further comprises a plurality of helical ramps, said plurality of helical ramps driving said spindle nut in a distal direction when said cartridge holder is rotated so that said spindle abuts a first surface of said bung.