Drug delivery device with end of dose feedback

Patent metadata

Field	Value
Publication number	US-2016287803-A1
Application number	US-201415036528-A
Country	US
Kind code	A1
Filing date	Nov 17, 2014
Priority date	Apr 24, 2011
Publication date	Oct 6, 2016
Grant date	—

Abstract

A method and an assembly for providing a drug delivery device is presented. The assembly includes a housing and an end of dose feedback connection provides the user with an audible and/or tactile signal to indicate that the drug delivery is completed. A first section of the end of dose feedback connection is located on a distal portion of an inner sleeve and a second section of the end of dose feedback connection is located on the mid-body.

First claim

1 - 14 . (canceled)

15 . An assembly for a drug delivery device comprising:
a housing; a lead screw having a distal end and a proximal end, the lead screw including a threaded shaft; a drive nut threadedly engaged with and screwable along the threaded shaft; an inner sleeve which is axially movable and rotatably fixed relative to the housing, wherein the drive nut is axially fixed to the inner sleeve and wherein the inner sleeve has a portion containing a first section of an end of dose feedback connection; a second section of the end of dose feedback connection which is provided axially fixed within the housing, wherein the assembly is configured such that, during dose setting, the drive nut is screwed along the threaded shaft, the drive nut carrying with it the inner sleeve, and wherein the assembly is configured such that, during dose delivery, the inner sleeve is advanced without rotation to axially advance the drive nut and thereby the lead screw.

16 . The assembly of claim 15 , wherein the first section of the end of dose feedback connection and the second section of the end of dose feedback connection are configured to cooperate mechanically and, due to this cooperation, to produce an audible and/or tactile signal to indicate that dose delivery has been completed.

17 . The assembly of claim 15 , wherein the assembly comprises a number sleeve which is threadedly engaged with the housing to be screwable relative to the housing and wherein the inner sleeve is threadedly engaged with the number sleeve.

18 . The assembly of claim 17 , which comprises a dial link connected with the drive nut and axially movable and rotatably fixed relative to the drive nut, and wherein the dial link is rotatably fixed with the number sleeve when the dial link and the number sleeve are in a first axial arrangement, the number sleeve being rotatable relative to the dial link when the dial link and the number sleeve are in a second axial arrangement.

19 . The assembly of claim 15 , wherein the assembly comprises a body part which is axially fixed inside of the housing, wherein the inner sleeve is axially movable and rotatably fixed relative to the body part and wherein the body part contains the second section of the end of dose feedback connection.

20 . The assembly of claim 15 , wherein the drive nut is rotatable with respect to the inner sleeve, and wherein the drive nut and the inner sleeve comprise one or more corresponding feedback features which are configured to cooperate mechanically such that, when the drive nut rotates relative to the inner sleeve, an audible and/or tactile feedback is generated.

21 . The assembly of claim 15 , wherein the first section of the end of dose feedback connection and the feedback feature of the inner sleeve are arranged in the same portion of the inner sleeve.

22 . The assembly of claim 15 , wherein the lead screw is rotatably fixed during dose setting and during dose delivery, and wherein the lead screw is axially movable in a distal direction relative to the housing.

23 . The assembly of claim 15 , wherein the first section of the end of dose feedback connection and the second section of the end of dose feedback connection are configured to establish a releasable connection, the first and second section of the end of dose feedback connection being connected before dose setting is commenced, the connection between the first and second section of the end of dose feedback connection being released during dose setting and the connection between the first and second section of the end of dose feedback connection being re-established at the end of dose delivery.

24 . The assembly of claim 15 , wherein the first section and second section of the end of dose feedback connection cooperate at a zero dose setting to form a releasable snap fit connection.

25 . The assembly of claim 24 , wherein the first section and the second section of the end of dose feedback connection are configured to generate an audible sound when the sections cooperate to form the releasable snap fit connection.

26 . The assembly of claim 24 , wherein the first section and the second section of the end of dose feedback connection are configured to generate a tactile sensation perceptible to a user holding the assembly or the drug delivery device when the sections cooperate to form the releasable snap fit connection.

27 . The assembly of claim 15 , wherein the second section of the end of dose feedback connection is a flexible click arm and the second section of the end of dose feedback connection is a ramped detent or hole or indentation.

28 . The assembly of claim 15 , wherein the second section of the end of dose feedback connection comprises at least two click arms and the first section of the end of dose feedback connection comprises at least two ramped detents or two holes or two indentations.

Assignees

• Sanofi Aventis Deutschland
• Sanofi Aventis Deutschland

Inventors

• Blancke Stefan
• Teucher Axel
• Jugl Michael
• Schneider Christiane

Classifications

• A61M2205/582

  by tactile feedback · CPC title

• A61M2205/581

  by audible feedback · CPC title

• A61M2005/3104

  Caps for syringes without needle · CPC title

• A61M5/31593

  Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir · CPC title

• A61M5/31585

  performed by axially moving actuator, e.g. an injection button · CPC title