Counting mechanism for a drug delivery device

Patent metadata

Field	Value
Publication number	US-2016144128-A1
Application number	US-201414905129-A
Country	US
Kind code	A1
Filing date	Jul 17, 2014
Priority date	Jul 17, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

The present disclosure relates to a counting mechanism ( 2 ) for a drug delivery device ( 1 ) comprising a first counting member ( 4 ) arranged for displaying a counted number and being biased to move in a first rotational direction and a connecting member ( 5 ) having a dose setting position and a dose dispensing position, wherein, in the dose setting position, the connecting member ( 5 ) impedes a rotation of the first counting member ( 4 ) in the first rotational direction, and wherein, in the dose dispensing position, the connecting member ( 5 ) permits the first counting member ( 4 ) to rotate in the first rotational direction.

First claim

1 . Counting mechanism ( 2 ) for a drug delivery device ( 1 ) comprising
a first counting member ( 4 ) arranged for displaying a counted number and being biased to move in a first rotational direction, and a connecting member ( 5 ) having a dose setting position and a dose dispensing position, wherein, in the dose setting position, the connecting member ( 5 ) impedes a rotation of the first counting member ( 4 ) in the first rotational direction, and wherein, in the dose dispensing position, the connecting member ( 5 ) permits the first counting member ( 4 ) to rotate in the first rotational direction.

2 . Counting mechanism ( 2 ) according to claim 1 ,
wherein, in the dose setting position, the connecting member ( 5 ) permits a rotation of the first counting member ( 4 ) in a second rotational direction.

3 . Counting mechanism ( 2 ) according to one of the preceding claims,
wherein the connecting member ( 5 ) is rotationally locked with the first counting member ( 4 ) in the dose setting position and in the dose dispensing position.

4 . Counting mechanism ( 2 ) according to one of the preceding claims,
wherein the connecting member ( 5 ) is movable along a longitudinal axis of the mechanism between the dose setting position and the dose dispensing position.

5 . Counting mechanism ( 2 ) according to one of the preceding claims,
comprising a trigger member ( 21 ) configured to move the connecting member ( 5 ) from the dose setting position to the dose dispensing position when the trigger member ( 21 ) is operated.

6 . Counting mechanism ( 2 ) according to one of the preceding claims,
comprising a return member ( 17 ) tending to move the connecting member ( 5 ) to the dose setting position.

7 . Counting mechanism ( 2 ) according to one of the preceding claims,
comprising a spring member ( 6 ) which biases the first counting member ( 4 ) to move in the first rotational direction.

8 . Counting mechanism ( 2 ) according to one of the preceding claims,
comprising an energy storing member ( 6 ) configured to store energy when the first counting member ( 4 ) is rotated in the second rotational direction.

9 . Counting mechanism ( 2 ) according to claim 8 ,
wherein the energy storing member ( 6 ) is configured to release the stored energy and thereby to move the first counting member ( 4 ) in the first rotational direction when the connecting member ( 5 ) is in the dose dispensing position.

10 . Counting mechanism ( 2 ) according to one of the preceding claims,
wherein the counting mechanism ( 2 ) further comprises a second counting member ( 7 ), and wherein the second counting member ( 7 ) is coupled to the first counting member ( 4 ) via a gearing member ( 8 ).

11 . Drug delivery device ( 1 ) comprising a counting mechanism according to one of the preceding claims and a body.

12 . Drug delivery device ( 1 ) according to claim 11 ,
comprising a piston rod ( 14 ) and a drive member ( 13 ) configured to move the piston rod ( 14 ), wherein the connecting member ( 5 ) is engaged with the drive member ( 13 ) in the dose dispensing position such that the drive member ( 13 ) is rotationally locked with the connecting member ( 5 ) in the dose dispensing position.

13 . Counting mechanism according to claim 12 ,
wherein the connecting member ( 5 ) is disengaged from the drive member ( 13 ) in the dose setting position such that the connecting member ( 5 ) is permitted to rotate relative to the drive member ( 13 ) in the dose setting position.

14 . Drug delivery device ( 1 ) according to one of claims 11 to 13 ,
wherein the connecting member ( 5 ) is engaged with the body ( 22 ) in the dose setting position, and
wherein the connecting member ( 5 ) is disengaged from the body ( 22 ) in the dose dispensing position.

15 . Drug delivery device ( 1 ) according to one of claims 11 to 14 ,
comprising a distal end portion ( 25 ), a gripping portion ( 24 ) and a proximal end portion ( 26 )
wherein the gripping portion ( 24 ) is a portion of a maximum diameter in the drug delivery device ( 1 ), and
wherein the gripping portion ( 24 ) is arranged between the distal end portion ( 25 ) and the proximal end portion ( 26 ).

Assignees

• Sanofi Sa

Inventors

• Oakley Tom
• Schumann Matt

Classifications

• A61M5/20 Primary

  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

• A61M5/3155

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

• A61M5/31568 Primary

  Means keeping track of the total dose administered, e.g. since the cartridge was inserted · CPC title

• A61M2005/3126

  Specific display means related to dosing · 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