Automatic injection device

• US 9,345,831 B2
• Filed: 10/18/2007
• Issued: 05/24/2016
• Est. Priority Date: 10/19/2006
• Status: Active Grant

• Current Assignee: E3D Agricultural Cooperative Association Ltd.
• Original Assignee: E3D Agricultural Cooperative Association Ltd.
• Inventors: Raday, Lior, Daily, David, Carmel, Ehoud, Ronen, Uriel
• Primary Examiner(s): Mehta, Bhisma
• Assistant Examiner(s): Zhang, Jenna
• Application Number:
  US12/446,168
• Publication Number:
  US 20100036318A1
• Time in Patent Office: 3,141 Days
• Field of Search: 604/218, 604/192, 604134-139
• US Class Current: 1/1
• 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 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 relative to said syringe 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;

a vial adaptor engagement assembly adapted for engagement with a vial adaptor, said vial adaptor engagement assembly comprising a needle guard; and

a user operable actuator button which, when displaced in a button displacement direction, is operable to cause displacement of said plunger assembly relative to said syringe in said first direction, said user operable actuator button being mechanically locked against displacement in said button displacement direction by said vial adaptor preventing access to said needle guard at all times that said syringe outlet is in operative engagement with said vial adaptor.

2. An automatic injection device according to claim 1 and wherein said user operable actuator button is displaceable in said button displacement direction only when said syringe outlet is in operative engagement with an injection site.

3. An automatic 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.

4. An automatic injection device according to claim 1 and wherein said vial adaptor engagement assembly 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.

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

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

an inadvertent fluid ejection prevention assembly comprising;

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.

6. An automatic injection device according to claim 5 and wherein said user operable actuation button is operative, when displaced in said button displacement direction to generally simultaneously unlock said plunger assembly and unlock said selectable driving assembly.

7. An automatic injection device according to claim 5 and wherein said vial adaptor engagement assembly comprises a connector rod which provides mechanical interaction between said vial adaptor and said locking assembly.

8. An automatic injection device according to claim 5 and wherein said needle guard provides mechanical interaction between said vial adaptor and said locking assembly.