AUTOMATIC INJECTION DEVICE

• US 20100036318A1
• Filed: 10/18/2007
• Published: 02/11/2010
• Est. Priority Date: 10/19/2006
• Status: Active Grant

• Current Assignee: E3D Agricultural Cooperative Association Ltd.
• Original Assignee: Elcam Medical Agricultural Cooperative Association Ltd
• Inventors: Daily, David, Raday, Lior, Carmel, Ehoud, Ronen, Uriel
• Granted Patent: US 9,345,831 B2
• Time in Patent Office: Days
• US Class Current: 604/134
• CPC Class Codes: A61M 2005/2013 triggering of discharging means by contact of injector with patient body
• CPC Class Codes: A61M 2005/206 With automatic needle insertion
• CPC Class Codes: A61M 2005/2073 preventing premature release, e.g. by making use of a safety lock
• CPC Class Codes: A61M 2005/208 Release is possible only when device is pushed against the skin, e.g. using a trigger which is blocked or inactive when the device is not pushed against the skin
• CPC Class Codes: A61M 2005/3258 being compressible or compressed along the needle
• CPC Class Codes: A61M 2205/27 preventing use
• CPC Class Codes: A61M 2205/276 preventing unwanted use
• 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 5/2033 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 5/31571 Means preventing accidental administration for automatic syringes A61M5/20
• 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: A61M 5/50 having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile retractable needles or needle protectors with means for preventing re-use A61M5/321

Abstract

An injection device for injecting a fluid into an object, the injection device including a plunger assembly for operative engagement with a syringe adapted to contain the fluid and permit ejection of the fluid therefrom via a syringe outlet, the plunger assembly being displaceable in a first direction which causes at least some of the fluid contained in the syringe to be ejected from the syringe via the syringe outlet and an inadvertent fluid ejection prevention assembly coupled to the plunger assembly for preventing ejection of fluid from the syringe in situations where the syringe outlet is neither in operative engagement with a vial adaptor suitable for providing fluid communication with the interior of a vial nor in fluid communication with an injection site within the object.

Claims

1. An injection device for injecting a fluid into an object, said injection device comprising:

a plunger assembly for operative engagement with a syringe adapted to contain said fluid and permit ejection of said fluid therefrom via a syringe outlet, said plunger assembly being displaceable in a first direction which causes at least some of said fluid contained in said syringe to be ejected from said syringe via said syringe outlet; and

an inadvertent fluid ejection prevention assembly coupled to said plunger assembly for preventing ejection of fluid from said syringe in situations where said syringe outlet is neither in operative engagement with a vial adaptor suitable for providing fluid communication with the interior of a vial nor in fluid communication with an injection site within said object.

2. An injection device according to claim 1 and wherein said plunger assembly is adapted for displacement also in a second direction opposite to said first direction.

3. An injection device according to claim 1 and also comprising:

a user operable actuator button which, when displaced in a button displacement direction, is operable to enable displacement of said plunger assembly in said first direction, said user operable actuator button normally being displaceable in said button displacement direction only when said syringe outlet is in operative engagement with said injection site.

4. An injection device according to claim 2 and also comprising:

a user operable actuator button which, when displaced in a button displacement direction, is operable to enable displacement of said plunger assembly in said first direction, said user operable actuator button normally being displaceable in said button displacement direction only when said syringe outlet is in operative engagement with said injection site.

5. An injection device according to claim 1 and wherein said inadvertent fluid ejection prevention assembly includes a vial adaptor engagement assembly which is displaceable responsive to operative engagement with said vial adaptor to an operative orientation which enables said plunger assembly to be displaced in said first direction.

6. An injection device according to claim 2 and wherein said inadvertent fluid ejection prevention assembly includes a vial adaptor engagement assembly which is displaceable responsive to operative engagement with said vial adaptor to an operative orientation which enables said plunger assembly to be displaced in said first direction.

7. An automatic injection device for injecting a fluid into an object, said automatic injection device comprising:

a plunger assembly for operative engagement with a syringe adapted to contain said fluid and permit ejection of said fluid therefrom via a syringe outlet, said plunger assembly being displaceable in a first direction which causes at least some of said fluid contained in said syringe to be ejected from said syringe via said syringe outlet; and

a user operable actuator button which, when displaced in a button displacement direction, is operable to cause displacement of said plunger assembly in said first direction, said user operable actuator button being mechanically locked against displacement in said button displacement direction when said syringe outlet is in operative engagement with a vial adaptor.

8. An automatic injection device according to claim 7 and wherein said plunger assembly is adapted for displacement also in a second direction opposite to said first direction.

9. An automatic injection device according to claim 7 or claim 8 and also including a vial adaptor engagement assembly which is displaceable responsive to operative engagement with said vial adaptor to an operative orientation which enables said plunger assembly to be displaced in said first direction.

10. An automatic injection device for injecting a fluid into an object, said automatic injection device comprising:

a plunger assembly for operative engagement with a syringe adapted to contain said fluid and permit ejection of said fluid therefrom via a syringe outlet, said plunger assembly being displaceable in a first direction which causes at least some of said fluid contained in said syringe to be ejected from said syringe via said syringe outlet; and

an inadvertent fluid ejection prevention assembly coupled to said plunger assembly and including a vial adaptor engagement assembly which is displaceable responsive to operative engagement with a vial adaptor to an operative orientation which enables said plunger assembly to be displaced in said first direction.

11. An automatic injection device according to claim 10 and wherein said vial adaptor engagement assembly comprises a needle guard.

12. An automatic injection device according to claim 10 and also comprising:

a selectable driving assembly operative, when actuated by a user, to drive said plunger assembly in said first direction;

and wherein said inadvertent fluid ejection prevention assembly comprises;

a locking assembly operative to lock said plunger assembly against displacement in said first direction and to permit displacement of said plunger assembly in a second direction, opposite to said first direction.

13. An automatic injection device according to claim 12 and also comprising a user operable actuation button operative when pressed by a user to generally simultaneously unlock said plunger assembly and unlock said selectable driving assembly.

14. An automatic injection device according to claim 12 and wherein said vial adaptor engagement assembly comprises a connector rod which provides mechanical interaction between said vial adaptor and said locking assembly.

15. An automatic injection device according to claim 10 and wherein said plunger assembly is adapted for displacement also in a second direction opposite to said first direction.

16. An injection device for injecting a fluid into an object, said injection device comprising:

a plunger assembly for operative engagement with a syringe adapted to contain said fluid and permit ejection of said fluid therefrom via a syringe outlet, said plunger assembly being displaceable in a first direction, which causes at least some of said fluid contained in said syringe to be ejected from said syringe via said syringe outlet, and in a second direction opposite to said first direction;

a selectable driving assembly operative, when actuated by a user, to drive said plunger assembly in said first direction;

a first locking assembly operative to lock said plunger assembly against displacement in said first direction and to permit displacement of said plunger assembly in said second direction; and

a second locking assembly operative to lock said selectable driving assembly against displacement in said first direction.

17. An injection device according to claim 16 and also comprising a user operable actuation button operative when pressed by said user to generally simultaneously unlock said plunger assembly and unlock said selectable driving assembly.

18. An injection device according, to claim 16 and also comprising a vial adaptor engagement assembly which is displaceable responsive to operative engagement with a vial adaptor to an operative orientation which enables said plunger assembly to be displaced in said first direction.

19. An injection device according to claim 17 and also comprising a vial adaptor engagement assembly which is displaceable responsive to operative engagement with a vial adaptor to an operative orientation which enables said plunger assembly to be displaced in said first direction.

20. An injection device according to claim 18 and wherein said vial adaptor engagement assembly comprises a connector rod which provides mechanical interaction between said vial adaptor and said first locking assembly.

21. An injection device according to claim 19 and wherein said vial adaptor engagement assembly comprises a connector rod which provides mechanical interaction between said vial adaptor and said first locking assembly.

22. An injection device according to claim 18 and wherein said vial adaptor engagement assembly comprises a needle guard which provides mechanical interaction between said vial adaptor and said first locking assembly.

23. An injection device according to claim 19 and wherein said vial adaptor engagement assembly comprises a needle guard which provides mechanical interaction between said vial adaptor and said first locking assembly.