Resettable drug delivery device

• US 9,623,187 B2
• Filed: 05/27/2010
• Issued: 04/18/2017
• Est. Priority Date: 06/01/2009
• Status: Active Grant

• Current Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Original Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Inventors: Jones, Christopher John
• Primary Examiner(s): Stigell, Theodore
• Application Number:
  US12/788,678
• Publication Number:
  US 20100324495A1
• Time in Patent Office: 2,518 Days
• Field of Search: 604207-211, 604232, 604234, 604310, 604311
• CPC Class Codes: A61M 2005/2488 via rotation, e.g. threads or bayonet
• 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 5/31535 Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
• 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
• CPC Class Codes: A61M 5/31585 performed by axially moving actuator, e.g. an injection button

Abstract

A resettable dosing mechanism comprises a dose button and a dial grip operatively coupled to the dose button. A spindle acts on a bung of a cartridge and a driver is operatively coupled between the dose button and the spindle. During an injection of the dose, the dose button moves in an axial direction to cause the spindle to administer the dose. During resetting of the dose setting mechanism, the spindle is retracted back into the dose setting mechanism.

Claims

1. A resettable dosing mechanism for use with a resettable pen type drug delivery device, said dosing mechanism comprising:

a dose button;

a dial grip operatively coupled to said dose button and a dose dial sleeve that is configured to rotate during dose setting and during dose delivery, said dial grip rotatable to set a dose;

a spindle for acting on a bung of a cartridge; and

a driver operatively coupled to said dose button and said spindle, where the driver is engaged with the dose dial sleeve such that the driver rotates during dose setting and does not rotate during dose delivery;

wherein during an injection of said dose, said dose button moves in an axial direction to cause said spindle to rotate and move in a distal direction to administer said dose, and

wherein during resetting of said resettable dosing mechanism, the dial grip must be pulled by a user in a proximal direction to disengage the driver from the dose dial sleeve before the spindle can be pushed in a proximal direction and retracted back into said resettable dosing mechanism.

2. The invention of claim 1 wherein said dial grip must be rotated to an initial starting position before said dial grip can be pulled in said proximal direction to retract said spindle back into said resettable dosing mechanism.

3. The invention of claim 1 wherein said resettable dosing mechanism is removably connected to a cartridge holder.

4. The invention of claim 1 wherein when said spindle is retracted back into said resettable dosing mechanism, said spindle rotates.