DRUG DELIVERY DEVICE AND DRIVE MEMBER FOR A DRUG DELIVERY DEVICE

• US 20120283655A1
• Filed: 09/29/2010
• Published: 11/08/2012
• Est. Priority Date: 09/30/2009
• Status: Active Grant

• Current Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Original Assignee: Sanofi-Aventis Deutschland GmbH (Sanofi )
• Inventors: Plumptre, David, Lindsay, Andrew Mark, Veasey, Robert, Jones, Christopher, Kouyoumjian, Garen, MacDonald, Catherine Anne
• Granted Patent: US 9,533,107 B2
• Time in Patent Office: Days
• US Class Current: 604/211
• CPC Class Codes: A61M 2005/2407 from the rear
• CPC Class Codes: A61M 2005/3126 Specific display means related to dosing
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/582 by tactile feedback
• 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 5/3146 Priming, e.g. purging, reducing backlash or clearance
• 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 5/31555 by purely axial movement of dose setting member, e.g. during setting or filling of a syringe
• CPC Class Codes: A61M 5/3157 Means providing feedback signals when administration is completed A61M5/20 takes precedence
• CPC Class Codes: A61M 5/31575 using scaling up or down transmissions, e.g. gearbox
• CPC Class Codes: A61M 5/31585 performed by axially moving actuator, e.g. an injection button

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.

Claims

1. A drive member for driving a piston rod in a drug delivery device,

the drive member having a longitudinal axis having a distal direction and a proximal direction,

wherein the drive member is configured to be driven in a rotational movement around the longitudinal axis by an 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.

2. The drive member 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 the contact face on the dose set section for setting a dose and on the dose dispense section for dispensing a dose.

3. The drive member 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 drive member of claim 3, wherein the bias track comprises a first redirecting section being inclined to the longitudinal axis.

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

6. The drive member 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 drive member 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. A drug delivery device comprising

a drive member of any of the previous claims and

an actuating member for driving the drive member, 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.

9. The drug delivery device of claim 8, 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.

10. The drug delivery device of claim 8, wherein at the end of a dose set operation the bias exerted by the 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.

11. The drug delivery device of claim 8,

comprising a piston rod configured to be driven by the drive member in a dose dispense operation,

wherein a relative rotational movement between the piston rod and the drive member is prevented and a relative axial movement is enabled.

12. The drug delivery device of claim 11,

wherein at the end of a dose dispense operation a torque exerted by the 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.

13. The drug delivery device of claim 8 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.

14. The drug delivery device of any of claim 8 comprising a dose member operable by a user, wherein the dose member serves as the actuating member for driving the drive member.

15. The drug delivery device of claim 14, wherein the dose member is configured for being pulled for setting a dose and to be pushed for dispensing the set dose.