Drive assembly, drive component and drug delivery device

Patent metadata

Field	Value
Publication number	US-2016001010-A1
Application number	US-201514858105-A
Country	US
Kind code	A1
Filing date	Sep 18, 2015
Priority date	Jun 11, 2010
Publication date	Jan 7, 2016
Grant date	—

Abstract

A drive assembly ( 70 ) for a drug delivery device ( 1 ) comprises a rotation member ( 21 ) being configured to be rotated in a first direction ( 44 ) during setting of a dose of a drug and to be rotated in a second direction ( 47 ) during delivery of the dose, a drive component ( 20 ) being configured to follow rotational movement of the rotation member ( 21 ) in the second direction ( 47 ) during delivery of the dose and a stop member ( 26 ) being configured to prevent rotational movement of the drive component ( 20 ) in the first direction ( 44 ). The drive component ( 20 ) comprises a first drive part ( 71 ) and a second drive part ( 72 ), coupled to each other such that relative rotational movement of the first and second drive parts ( 71, 72 ) is prevented and relative axial movement is permitted.

First claim

1 - 18 . (canceled)

19 . A drive assembly for a drug delivery device, the drive assembly comprising:
a housing having a proximal end and a distal end, a rotation member being configured to be rotated in a first direction with respect to the housing during setting of a dose of a drug and to be rotated in a second direction with respect to the housing during delivery of the dose, the second direction being opposite to the first direction, a drive component being configured to follow rotational movement of the rotation member in the second direction during delivery of the dose, a stop member being configured to prevent rotational movement of the drive component in the first direction with respect to the housing, wherein the drive component comprises a first drive part and a second drive part, coupled to each other such that relative rotational movement of the first and second drive parts is prevented and relative axial movement is permitted, wherein the first drive part is configured for engagement with the rotation member, the stop member being secured against both axial and rotational movements with respect to the housing and the stop member being configured to permit rotational movement of the drive component in the second direction with respect to the housing.

20 . The drive assembly of claim 19 , comprising a piston rod being configured to be displaced in the distal direction for delivering a dose of a drug and being configured such that rotational movement of the drive component in the second direction is at least partially converted into movement of the piston rod in the distal direction with respect to the housing.

21 . The drive assembly of claim 19 , wherein the drive component comprises a biasing member for providing a force on at least one of the first and second drive parts for keeping at least one of the first and second drive parts in abutment with at least one of the rotation member and the stop member.

22 . The drive assembly of claim 19 , wherein at least one of the first and second drive parts comprises a toothing for engagement with at least one of the rotation member and the stop member.

23 . The drive assembly of claim 19 , wherein the stop member and the drive component are coupled to one another by a first uni-directional friction clutch mechanism, which is configured to prevent relative rotational movement between the stop member and the drive component in the first direction with respect to the housing and to permit relative rotational movement of the stop member and the drive component in the second direction with respect to the housing.

24 . A drive component for use in a drive assembly according to claim 19 , the drive component comprising a first drive part and a second drive part, coupled to each other such that relative rotational movement of the first and second drive parts is prevented and relative axial movement is permitted, wherein the first drive part comprises first engagement means which are configured for establishing a uni-directional friction clutch mechanism which is adapted and arranged to prevent rotational movement of the first drive part in a first direction and to permit rotational movement of the first drive part in a second direction with respect to a mating first engagement means.

25 . A drug delivery device comprising at least one of the drive assembly of claim 19 , further comprising means for attaching a drug reservoir.

Assignees

• Sanofi Aventis Deutschland

Inventors

• Smith Christopher James
• Butler Stephen David
• Horlock Mark Philip

Classifications

• A61M5/31555 Primary

  by purely axial movement of dose setting member, e.g. during setting or filling of a syringe · CPC title

• Y10T74/18568

  Reciprocating or oscillating to or from alternating rotary · CPC title

• A61M5/31585

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

• A61M2205/582

  by tactile feedback · CPC title

• A61M2205/581

  by audible feedback · CPC title