Assembly for a drug delivery device and drug delivery device

Patent metadata

Field	Value
Publication number	US-9402959-B2
Application number	US-201013393324-A
Country	US
Kind code	B2
Filing date	Sep 21, 2010
Priority date	Sep 23, 2009
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

An assembly for a drug delivery device is provided for. The assembly may comprise a housing body having a longitudinal axis. It may have a drive assembly having a drive member, the drive member being configured to be axially displaced with respect to the housing body during operation of the drive assembly for setting and/or dispensing a dose of the drug. The assembly may have a display assembly having a display and an indicator element, the indicator element being axially displaceable with respect to the housing body along the longitudinal axis or the indicator element being rotationally displaceable with respect to the housing body around a rotational axis which is inclined, in particular perpendicular, to the longitudinal axis. The display may be configured such that it displays a first state when the indicator element is in a first position and switches to a second state when the indicator element is displaced away from the first position. The drive assembly may be configured such that the drive member transfers a force to the indicator element which force displaces the indicator element away from the first position when the drive assembly is operated for a first time. Further, a drug delivery device is provided for.

First claim

The invention claimed is:

1. An assembly for a drug delivery device comprising
a housing body having a longitudinal axis;
a drive assembly having a drive member, the drive member being configured to be axially displaced with respect to the housing body during operation of the drive assembly for at least one of (i) setting a dose of a drug or (ii) dispensing the dose of the drug; and
a display assembly having a display and an indicator element, the indicator element being axially displaceable with respect to the housing body along the longitudinal axis;
wherein
the display is configured such that it displays a first state through a window where the indicator element is only visible through the window when the indicator element is in a first position, and where the display switches to a second state when the indicator element is displaced away from the first position and is no longer visible through the window and only the drive member or another element of the drive assembly is visible through the window, and
the drive assembly is configured such that the drive member transfers a force to the indicator element which force displaces the indicator element away from the first position when the drive assembly carries out a priming step, where a switch from the first state to the second state occurs during the priming step when a first portion of the drug is dispensed for a first time,
wherein the drive member is operable to hold the indicator element in a resiliently biased position when the drive member is in a rest position;
wherein the drive member is inoperable to transfer said force to the indicator element when the indicator element is in the resiliently biased first position, and wherein the drive member is operable to transfer said force to the indicator element when the indicator element is in an interaction position; and
wherein the assembly is configured such that the indicator element can move radially from the resiliently biased position to the interaction position when the drive member is displaced by a predetermined distance from the rest position in a first axial direction.

2. The assembly of claim 1 , wherein the display comprises a window in the housing body and the indicator element is visible through the window to display the first state.

3. The assembly of claim 2 , wherein the drive member comprises a piston rod, the indicator element is fixed to the piston rod or formed integrally with the piston rod, and, when the display displays the second state, a portion of the piston rod which portion is free of the indicator element is visible through the window to display the second state.

4. The assembly of claim 1 , wherein the drive member comprises a piston rod and the indicator element is fixed to the piston rod or formed integrally with the piston rod.

5. The assembly of claim 1 , wherein the drive assembly is configured such that the indicator element is displaced from the first position to a predetermined second position when the drive assembly is operated for said first time.

6. The assembly of claim 5 , wherein the indicator element remains in the second position when the drive assembly is subsequently operated after the first dispense of the drug.

7. The assembly of claim 5 , wherein the drive member and the indicator element are decoupled from each other when the indicator element is in the second position.

8. The assembly of claim 1 , wherein the drive assembly comprises a piston rod, the piston rod being axially displaceable with respect to the drive member and the housing body and the drive member is operable to transfer a force to the piston rod for axially displacing the piston rod when the drive member is displaced in the first and/or second axial direction.

9. The assembly of claim 1 , wherein the indicator element and the drive member are operable to be axially displaced with respect to each other when the drive member is displaced in the first axial direction.

10. The assembly of claim 1 , wherein the drive member is operable to transfer said force to the indicator element when the drive member is displaced in the second axial direction during operation of the drive assembly for said first time.

11. The assembly of claim 1 , wherein the drive member is operable to hold the indicator element n a resiliently biased position before the drive assembly is operated for said first time.

12. A drug delivery device comprising an assembly according to claim 1 , wherein the drug delivery device is configured to dispense at least one fixed dose of the drug.

13. The assembly of claim 1 , where the drive member is configured to move relative to and independent of the indicator element when the indicator element is in the second state to dispense a second portion of the drug.

14. An assembly for a drug delivery device comprising
a housing body having a longitudinal axis;
a drive assembly having a drive member, the drive member being configured to be axially displaced with respect to the housing body during operation of the drive assembly for at least one of (i) setting a dose of a drug from a cartridge or (ii) dispensing the dose of the drug from the cartridge; and
a display assembly having a display and an indicator element, the indicator element being rotationally displaceable with respect to the housing body around a rotational axis which is inclined to the longitudinal axis;

wherein
the display is configured such that it displays a first state through a window where the indicator element is visible through the window when the indicator element is in a first position, and wherein the display switches to a second state when the indicator element is displaced away from the first position and is no longer visible through the window, and
the drive assembly is configured such that the drive member transfers a force to the indicator element which force displaces the indicator element away from the first position when the drive assembly carries out a priming step, where a switch from the first state to the second state occurs during the priming step when a first portion of the drug is dispensed for a first time,
where the indicator element remains displaced away from the first position when the drive assembly is subsequently operated, and
wherein the drive member is configured to be displaced in a first axial direction and subsequently in a second axial direction when the drive assembly is operated;
wherein the drive member is operable to hold the indicator element in a resiliently biased position when the drive member is in a rest position;
wherein the drive member is inoperable to transfer said force to the indicator element when the indicator element is in the resiliently biased position; and
wherein the drive member is operable to transfer said force to the indicator element when the indicator element is in an interaction position,
wherein the display assembly is configured such that the indicator element can move rotationally from the resiliently biased position to the interaction position when the drive member is displaced by a predetermined distance from the rest position in the first axial direction.

Assignees

• Schabbach Michael
• Heger Serpil
• Sanofi Aventis Deutschland

Inventors

• Schabbach Michael
• Heger Serpil

Classifications

• A61M5/31525 Primary

  Dosing (burettes, pipettes B01L3/02) · CPC title

• A61M5/31583

  based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod · CPC title

• A61M2005/3125

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

• A61M5/31533

  Dosing mechanisms, i.e. setting a dose (administrating mechanisms A61M5/31565) · CPC title

• A61M5/20

  Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically (A61M5/142 {, A61M5/46} take precedence; {hypodermic projectiles F42B12/54}) · CPC title