Injection device

Patent metadata

Field	Value
Publication number	US-2016220763-A1
Application number	US-201415026430-A
Country	US
Kind code	A1
Filing date	Oct 13, 2014
Priority date	Oct 18, 2013
Publication date	Aug 4, 2016
Grant date	—

Abstract

Described is an injection device ( 1 ) for administering a drug, the injection device ( 1 ) comprising a cartridge holder ( 2 ) adapted to receive a drug cartridge ( 3 ), a hollow injection needle ( 6 ) having a proximal tip ( 6.2 ) adapted to pierce a septum ( 4 ) of the cartridge ( 3 ) so as to establish a fluid communication between the cartridge ( 3 ) and the needle ( 6 ),and a cap ( 7 ) arrangeable over the cartridge holder ( 2 ) in a manner to cover the needle ( 6 ). In an initial state the cartridge ( 3 ) is arranged within the cartridge holder ( 2 ) with the septum ( 4 ) axially spaced from the proximal tip ( 6.2 ) of the needle ( 6 ). The cap ( 7 ) is adapted to move the needle ( 6 ) relative to the septum ( 4 ) for piercing it on movement of the cap ( 7 ) relative to the cartridge holder ( 2 ).

First claim

1 . Injection device ( 1 ) for administering a drug, the injection device ( 1 ) comprising:
a cartridge holder ( 2 ) adapted to receive a drug cartridge ( 3 ), a hollow injection needle ( 6 ) having a proximal tip ( 6 . 2 ) adapted to pierce a septum ( 4 ) of the cartridge ( 3 ) so as to establish a fluid communication between the cartridge ( 3 ) and the needle ( 6 ), a cap ( 7 ) arrangeable over the cartridge holder ( 2 ) in a manner to cover the needle ( 6 ), wherein in an initial state the cartridge ( 3 ) is arranged within the cartridge holder ( 2 ) with the septum ( 4 ) axially spaced from the proximal tip ( 6 . 2 ) of the needle ( 6 ), wherein the cap ( 7 ) is adapted to move the needle ( 6 ) relative to the septum ( 4 ) for piercing it on movement of the cap ( 7 ) relative to the cartridge holder ( 2 ).

2 . Injection device ( 1 ) according to claim 1 , wherein the cap ( 7 ) is adapted to move the needle ( 6 ) relative to the septum ( 4 ) for piercing it on movement of the cap ( 7 ) relative to the cartridge holder ( 2 ) in a distal direction (D) or in a proximal direction (P) or on relative rotational movement thereof.

3 . Injection device ( 1 ) according to one of the claim 1 or 2 , wherein the cartridge holder ( 2 ) is adapted to allow axial movement of the cartridge ( 3 ) within the cartridge holder ( 2 ) to and from the needle ( 6 ), which is arranged in the cartridge holder ( 2 ).

4 . Injection device ( 1 ) according to one of the preceding claims, wherein one or more lateral apertures ( 2 . 2 ) are arranged in the cartridge holder ( 2 ), wherein the cap ( 7 ) comprises one or more internal longitudinal ribs ( 7 . 1 ) adapted to protrude through the lateral apertures ( 2 . 2 ) to frictionally clamp and fix the drug cartridge ( 3 ) in an axial position within the cartridge holder ( 2 ).

5 . Injection device ( 1 ) according to claim 4 , wherein movement of the cap ( 7 ) in the distal direction (D) takes along the cartridge ( 3 ) until the cartridge ( 3 ) hits a stop ( 2 . 1 , 2 . 3 ) within the cartridge holder ( 2 ), wherein continued motion of the cap ( 7 ) in the distal direction (D) overcomes friction between the internal longitudinal ribs ( 7 . 1 ) and the cartridge ( 3 ) allowing complete removal of the cap ( 7 ) from the cartridge holder ( 2 ).

6 . Injection device ( 1 ) according to one of the claim 1 or 2 , wherein the injection needle ( 6 ) is arranged in a needle hub ( 6 . 3 ) adapted to be moved relative the cartridge holder ( 2 ) in which the cartridge ( 3 ) is retained and axially fixed.

7 . Injection device ( 1 ) according to claim 6 , wherein at a distal end of the cartridge holder ( 2 ) an adapter ( 2 . 3 ) is provided adapted to telescope with the needle hub ( 6 . 3 ).

8 . Injection device ( 1 ) according to claim 7 , wherein the needle hub ( 6 . 3 ) and the adapter ( 2 . 3 ) comprise corresponding snap features ( 6 . 4 , 2 . 5 ) for axially coupling the needle hub ( 6 . 3 ) to the adapter ( 2 . 3 ).

9 . Injection device ( 1 ) according to claim 8 , wherein the snap features ( 6 . 4 , 2 . 5 ) are adapted to create an audible and/or tactile feedback on engagement.

10 . Injection device ( 1 ) according to one of the claims 6 to 9 , wherein the cap ( 7 ) comprises a needle seat ( 7 . 2 ) for retaining and positively and/or non-positively fixing the needle hub ( 6 . 3 ) with respect to relative axial movement and/or relative rotation.

11 . Injection device ( 1 ) according to one of the claims 6 to 10 , wherein a spring ( 9 ) is arranged for biasing the cap ( 7 ) in the distal direction (D) relative to the cartridge holder ( 2 ).

12 . Injection device ( 1 ) according to one of the claims 7 to 11 , wherein the needle hub ( 6 . 3 ) and the adapter ( 2 . 3 ) comprise corresponding first threads ( 6 . 5 , 2 . 7 ) for screwing the needle hub ( 6 . 3 ) onto the adapter ( 2 . 3 ).

13 . Injection device ( 1 ) according to one of the claims 10 to 12 , wherein a distal stop ( 7 . 4 ) is provided in the cap ( 7 ) for limiting movement of the needle hub ( 6 . 3 ) in the distal direction (D) within the cap ( 7 ).

14 . Injection device ( 1 ) according to one of the preceding claims, wherein corresponding second threads ( 2 . 8 , 7 . 5 ) are arranged between the cartridge holder ( 2 ) and the cap ( 7 ).

15 . Injection device ( 1 ) according to claim 14 , wherein the second threads ( 2 . 8 , 7 . 5 ) have a handedness which is the opposite of the handedness of the first threads ( 2 . 7 , 6 . 5 ).

Assignees

• Sanofi Aventis Deutschland

Inventors

• Teucher Axel
• Jugl Michael

Classifications

• A61M2005/2474

  with movable piercing means, e.g. ampoule remains fixed or steady · CPC title

• A61M5/3293

  characterised by features of the needle hub · CPC title

• A61M2005/247

  with fixed or steady piercing means, e.g. piercing under movement of ampoule · CPC title

• A61M2005/2477

  comprising means to reduce play of ampoule within ampoule holder, e.g. springs · CPC title

• A61M5/2466

  by piercing without internal pressure increase (A61M5/2429 takes precedence) · CPC title