Priming configuration for a medical device and drug delivery device comprising a priming configuration

Patent metadata

Field	Value
Publication number	US-2016158451-A1
Application number	US-201414904746-A
Country	US
Kind code	A1
Filing date	Jul 17, 2014
Priority date	Jul 17, 2013
Publication date	Jun 9, 2016
Grant date	—

Abstract

The priming configuration comprises a piston rod ( 1 ), a bung ( 2 ), which is provided to be driven by the piston rod, and a movable element ( 5 ), which is engaged with the piston rod. The movable element is arranged to be movable in a predefined direction ( 10 ) with respect to the piston rod by a user of the drug delivery device. A movement of the movable element in the predefined direction advances the piston rod in a further direction ( 11 ), providing a priming of the drug delivery device before use. The predefined direction may especially be transverse to the further direction, and the further direction may especially be directed from the piston rod towards the bung ( 2 ). A gap ( 12 ) or clearance between the piston rod ( 1 ) and the bung ( 2 ) can thus be removed, and the stiction of the bung ( 2 ) to the cartridge ( 3 ) can be reduced.

First claim

1 . A priming configuration for a medical device, comprising:
a movable functional part ( 1 ) provided for an operation of the device, and a movable element ( 5 ) operationally coupled with the functional part ( 1 ), characterized in that the movable element ( 5 ) is arranged to be movable in a predefined direction ( 10 ) with respect to the functional part ( 1 ) by a user of the medical device, a movement of the movable element ( 5 ) in the predefined direction ( 10 ) advancing the functional part ( 1 ) in a further direction ( 11 ) thereby providing a priming of the medical device before use.

2 . The priming configuration of claim 1 , wherein
the priming configuration is a piston rod arrangement for priming a drug delivery device, and the movable functional part ( 1 ) is a piston rod ( 1 ).

3 . The priming configuration of claim 1 or 2 , wherein
the functional part ( 1 ) is a piston rod ( 1 ), and
the piston rod ( 1 ) is provided to drive a bung ( 2 ) of a container ( 3 ) containing a drug in a drug delivery device.

4 . The priming configuration of claim 3 , wherein
the priming includes a slight movement of the bung ( 2 ) generated by the movable element ( 5 ) to overcome a stiction of the bung ( 2 ) to the container ( 3 ).

5 . The priming configuration of claim 3 or 4 , further comprising:
a spring provided to move the bung ( 2 ), the spring advancing the piston rod ( 1 ) in the further direction ( 11 ) thereby providing the priming.

6 . The priming configuration according to one of claims 3 to 5 , wherein
the predefined direction ( 10 ) is transverse to the further direction ( 11 ), and
the further direction ( 11 ) is from the piston rod ( 1 ) towards the bung ( 2 ).

7 . The priming configuration according to one of claims 2 to 6 , wherein
the movable element ( 5 ) is operationally coupled with the piston rod ( 1 ) by an inclined surface ( 8 ) of the movable element ( 5 ), the inclined surface ( 8 ) being inclined with respect to the further direction ( 11 ) and being in contact with the piston rod ( 1 ).

8 . The priming configuration according to one of claims 2 to 7 , further comprising:
an opening ( 6 ) in the piston rod ( 1 ), the movable element ( 5 ) extending into the opening ( 6 ) and being engaged with the piston rod ( 1 ) within the opening ( 6 ).

9 . The priming configuration according to one of claims 2 to 8 , further comprising:
a grip ( 7 ) of the movable element ( 5 ), the grip ( 7 ) being provided to move the movable element ( 5 ) in the predefined direction ( 10 ), and wherein the predefined direction is a direction away from the piston rod ( 1 ).

10 . The priming configuration according to one of claims 2 to 9 , further comprising:
a button ( 9 ) of the movable element ( 5 ), the button ( 9 ) being provided to move the movable element ( 5 ) in the predefined direction ( 10 ), and wherein the predefined direction is a direction towards the piston rod ( 1 ).

11 . The priming configuration according to one of claims 2 to 10 , wherein
the movable element ( 5 ) is provided to be removed from the piston rod ( 1 ).

12 . The priming configuration of claim 1 , wherein the functional part ( 1 ) is in communication with a mechanical pump.

13 . The priming configuration of claim 1 , wherein the functional part ( 1 ) is in communication with a metering chamber.

14 . A drug delivery device comprising a priming configuration according to one of claims 1 to 13 .

15 . The drug delivery device of claim 14 , the drug delivery device being an injection device.

16 . The drug delivery device of claim 14 or 15 , the drug delivery device being a pen-type device.

Assignees

• Sanofi Sa

Inventors

• Oakley Tom
• Schumann Matt
• Milne Stuart

Classifications

• A61M5/31515

  Connection of piston with piston rod · CPC title

• A61M15/009

  using medicine packages with incorporated spraying means, e.g. aerosol cans (pocket atomiser of the injector type A61M11/08) · CPC title

• A61M11/007

  Syringe-type or piston-type sprayers or atomisers · CPC title

• A61M5/3146 Primary

  Priming, e.g. purging, reducing backlash or clearance · 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