Re-Useable Auto-Injector with Filling Means

• US 20110130743A1
• Filed: 06/10/2009
• Published: 06/02/2011
• Est. Priority Date: 06/19/2008
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Cilag Gmbh International (Johnson & Johnson)
• Inventors: Jennings, Douglas Ivan, Burnell, Rosemary Louise
• Granted Patent: US 9,682,194 B2
• Time in Patent Office: Days
• US Class Current: 604/506
• CPC Class Codes: A61J 1/201 having one piercing end
• CPC Class Codes: A61J 1/2096 Combination of a vial and a syringe for transferring or mixing their contents
• CPC Class Codes: A61M 2005/206 With automatic needle insertion
• CPC Class Codes: A61M 5/1782 Devices aiding filling of syringes in situ combination of a vial and a syringe for transferring or mixing their contents A61J1/2096, filling of medical containers in general B65B3/003
• CPC Class Codes: A61M 5/20 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 Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287
• CPC Class Codes: A61M 5/326 Fully automatic sleeve extension, i.e. in which triggering of the sleeve does not require a deliberate action by the user
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

An injection device having a first sub-assembly comprises a housing and a chamber. The chamber is disposed within the housing and has proximal and distal ends, an inner surface and an exit aperture. The sub-assembly comprises a stopper movably disposed within the chamber. The stopper has an outer surface substantially in contact with the inner surface about its perimeter. The sub-assembly comprises a port adapted to receive a container containing a fluid. The stopper is fixed with respect to the housing and movement of the port causes movement of the exit aperture in relation to the stopper.

Claims

1. An injection device having a first sub-assembly comprising:

a housing;

a chamber disposed within the housing and having proximal and distal ends, an inner surface and an exit aperture;

a stopper movably disposed within the chamber and having an outer surface substantially in contact with the inner surface about its perimeter; and

a port adapted to receive a container containing a fluid;

wherein the stopper is fixed with respect to the housing and movement of the port causes movement of the exit aperture in relation to the stopper.

2. The injection device of claim 1, wherein the port is configured to bring said container into fluid engagement with the exit aperture when the exit aperture is adjacent the stopper.

3. The injection device of claim 1 or claim 2, further comprising:

a biasing element coupled to the port and configured to bias the port such that the exit aperture is biased away from the stopper.

4. The fluid container of claim 2 or claim 3, wherein engagement between the container and the exit aperture forms a fluid conduit for transferring fluid from the container to the chamber.

5. The injection device of any preceding claim, further comprising an injection needle in fluid communication with the exit aperture.

6. The injection device of claim 5, wherein the container comprises a cap, and wherein the injection needle is configured to pierce the cap to form a fluid conduit for transferring fluid from the container to the chamber.

7. The injection device of any preceding claim, further comprising a second sub-assembly comprising:

a releasable drive mechanism configured to be driven against the stopper upon activation of the drive mechanism.

8. The injection device of claim 7, when dependent on claim 5 or claim 6, wherein the releasable drive mechanism is, upon activation, adapted to:

(a) move the chamber and the injection needle from a retracted position in which the needle is wholly inside the housing to an extended position in which the needle is at least partially outside the housing; and

(b) subsequently move the stopper within the chamber toward the exit aperture to expel fluid out of the injection needle.

9. The injection device of claim 8, further comprising a retraction mechanism adapted to retract the injection needle into the housing after the fluid has been expelled.

10. The injection device of any one of claims 7 to 9, wherein:

the first sub-assembly is detachable from the second sub-assembly; and

the second sub-assembly is reusable.

11. A method of priming an injection device having a housing, comprising:

inserting a container into a port on the injection device, the port being moveable with respect to the housing, the injection device comprising a chamber having an exit aperture and a stopper movably disposed within the chamber, the stopper being fixed with respect to the housing such that movement of the port causes movement of the exit aperture relative to the stopper;

moving the port into the housing; and

moving the port out of the housing such that fluid is drawn into the chamber from the container.