Resettable drug delivery device

Patent metadata

Field	Value
Publication number	US-9358341-B2
Application number	US-201013496538-A
Country	US
Kind code	B2
Filing date	Sep 29, 2010
Priority date	Sep 30, 2009
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A drive member for driving a piston rod in a drug delivery device is provided. The drive member is configured to be driven in a rotational movement by an actuating member. The drive member comprises a track for transmitting a driving load from the actuating member to the drive member. The track comprises both sections running in a distal and sections running in a proximal direction of the drive member. Moreover, a drug delivery device comprising such a drive member is provided.

First claim

The invention claimed is:

1. A drug delivery device comprising:
a drive member having a longitudinal axis having a distal direction and a proximal direction;
an actuating member for driving the drive member; and
a piston rod configured to be driven by the drive member in a dose dispense operation, where a relative rotational movement between the piston rod and the drive member is prevented and a relative axial movement is enabled,
wherein the drive member is configured to be driven in a rotational movement around the longitudinal axis by the actuating member,
wherein the drive member comprises a track having a contact face for transmitting a driving load from the actuating member to the drive member,
wherein the track comprises both sections running in the distal direction and sections running in the proximal direction of the drive member
wherein at an end of a dose dispense operation a torque exerted by a biasing means results in a rotation of the drive member such that the piston rod is moved in the proximal direction, thereby enabling a relaxation of a bung in a cartridge towards the proximal direction of the drug delivery device, and
wherein the device being configured to dispense a dose of a drug in a dose dispense operation as well as being configured to be prepared for a subsequent dose dispense operation in a dose set operation.

2. The drug delivery device of claim 1 , wherein the track comprises at least one dose set section and at least one dose dispense section,
wherein in an assembled form of a drug delivery device, the actuating member contacts a contact face on the dose set section for setting a dose and on the dose dispense section for dispensing a dose.

3. The drug delivery device of claim 1 , comprising a bias track having a contact face for transmitting a load from a component of biasing means to the drive member for biasing the drive member towards a rotation around the longitudinal axis.

4. The drug delivery device of claim 3 , wherein the bias track comprises a first redirecting section being inclined relative to the longitudinal axis.

5. The drug delivery device of claim 4 , wherein the bias track comprises a second redirecting section being inclined relative to the longitudinal axis in a sense opposite to the first redirecting section.

6. The drug delivery device of claim 5 , wherein the first and the second redirecting sections are adjacent to each other, thereby forming a recess in the bias track.

7. The drug delivery device of claim 1 , comprising a coupling means configured for coupling a piston rod to the drive member such that a relative translational movement of the drive member and the piston rod is allowed and a relative rotational movement is prevented.

8. The drug delivery device of claim 1 , comprising biasing means configured to bias the drive member at one of or both the end of a dose set operation and a dose dispense operation towards a rotation around the longitudinal axis.

9. The drug delivery device of claim 1 , wherein at the end of a dose set operation a bias exerted by a biasing means results in a rotation of the drive member towards a position relative to the actuating member such that a subsequent dose dispense operation is enabled.

10. The drug delivery device of claim 1 comprising a threaded component being fixed to a housing of the drug delivery device, wherein the threaded component is threadedly engaged with the piston rod.

11. The drug delivery device of any of claim 1 comprising a dose member operable by a user, wherein the dose member serves as the actuating member for driving the drive member.

12. The drug delivery device of claim 11 , wherein the dose member is configured for being pulled for setting a dose and to be pushed for dispensing the set dose.

Assignees

• Plumptre David
• Lindsay Andrew Mark
• Macdonald Catherine Anne
• Veasey Robert
• Jones Christopher
• Kouyoumjian Garen
• Sanofi Aventis Deutschland

Inventors

• Plumptre David
• Lindsay Andrew Mark
• Macdonald Catherine Anne
• Veasey Robert
• Jones Christopher
• Kouyoumjian Garen

Classifications

• A61M2005/3125

  specific display means, e.g. to indicate dose setting · CPC title

• A61M5/31543

  piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change · CPC title

• A61M5/31575

  using scaling up or down transmissions, e.g. gearbox · CPC title

• A61M2005/3126

  Specific display means related to dosing · CPC title

• A61M5/24 Primary

  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 title