Modular automatic or manual emergency medicine injection system

• US 5,695,472 A
• Filed: 07/30/1996
• Issued: 12/09/1997
• Est. Priority Date: 05/27/1993
• Status: Expired due to Term

• Current Assignee: Washington Biotech Corporation
• Original Assignee: Washington Biotech Corporation
• Inventors: Wyrick, Ronald E.
• Primary Examiner(s): Hafer, Robert A.
• Assistant Examiner(s): Racunas, Robert V.
• Application Number:
  US08/687,508
• Time in Patent Office: 497 Days
• Field of Search: 604/134, 604/135, 604/136, 604/156, 604/157, 604/208, 604/211, 128/DIG. 12
• US Class Current: 604/136
• 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 2005/3139 Finger grips not integrally formed with the syringe barrel, e.g. using adapter with finger grips
• CPC Class Codes: A61M 2005/3142 Modular constructions, e.g. supplied in separate pieces to be assembled by end-user
• CPC Class Codes: A61M 5/002 Packages specially adapted therefor, e.g. for syringes or needles, kits for diabetics needle protection, e.g. caps, A61M5/3202; for sharps A61B50/3001
• CPC Class Codes: A61M 5/003 Kits for diabetics
• 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 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• CPC Class Codes: A61M 5/28 Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
• CPC Class Codes: A61M 5/31511 Piston or piston-rod constructions, e.g. connection of piston with piston-rod A61M5/5066 takes precedence
• CPC Class Codes: A61M 5/31551 including axial movement of dose setting member
• CPC Class Codes: A61M 5/31563 interacting with a displaceable stop member
• CPC Class Codes: A61M 5/3158 performed by axially moving actuator operated by user, e.g. an injection button
• CPC Class Codes: A61M 5/31591 Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
• CPC Class Codes: A61M 5/31595 Pre-defined multi-dose administration by repeated overcoming of means blocking the free advancing movement of piston rod, e.g. by tearing or de-blocking
• 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

Abstract

A modular fluid medication injection assembly (10) includes a medicant module (12) and an activator module (14). The medicant module (12) holds a replaceable, disposable syringe subassembly (24). The activator module (14) contains a driver (56) and driver release (70) for deployment and injection of the syringe subassembly. The modular design permits the use of various-sized medicant modules (12) to accommodate different sized syringe subassemblies (24) and dosages of fluid medication. Additionally, spare modules (12) may be kept on hand for administering multiple dosages from the same syringe subassembly. A carrying case (166) for the injection assembly (10) is also disclosed.

Claims

1. A modular fluid medication injection system capable of automatic mechanically powered administration and manual administration of a fluid medication, comprising:

a medicant module having a needle end and a plunger end, the medicant module comprising;

a barrel having a cavity therein;

a manually usable syringe subassembly positioned within the barrel slidable within the cavity to allow deployment of the syringe subassembly, the syringe subassembly having;

an ampule for housing fluid medication;

a needle in fluid communication with said ampule;

a plunger for forcing the fluid medication from the ampule through the needle;

said plunger including a plunger shaft and a plunger portion which extends from the ampule to allow manual depression of the plunger to dispense fluid from the ampule;

an activator module having a driver end detachably connected to the plunger end of the medicant module and a proximal end, the activator module comprising;

a driver for forcing the syringe subassembly through the barrel to inject the needle and displace fluid medication through the needle, the driver having a ramming head oriented toward the driver end of the activator module, the ramming head operably abutting the plunger of the syringe subassembly when the activator module is connected to the medicant module; and

a driver release for controllably releasing the driver.

2. A modular fluid medication injection system according to claim 1 wherein the ramming head of the driver engages, but is not attached to, the plunger of the syringe subassembly.

3. A modular fluid medication injection system according to claim 1 wherein the barrel extends beyond the plunger at the plunger end of the medicant module to protect the plunger.

4. A modular fluid medication injection system according to claim 1 wherein the medicant module further comprises a biasing spring to force the syringe subassembly toward the plunger end of the medicant module.

5. A modular fluid medication injection system according to claim 1 further comprising a trigger handle connected to the driver release for movement from rest to fire positions, the driver release releasing the driver as the trigger handle is moved to a fire position.

6. A modular fluid medication injection system according to claim 1 wherein the activator module comprises:

a driver housing having an elongated chamber for supporting the driver therein;

a trigger handle connected to the driver release for movement from rest to fire positions, the release releasing the driver as the trigger handle is moved to a fire position; and

the trigger handle comprising a circumscribing, tubular sleeve member which fits over and slidably moves relative to the driver housing;

the sleeve member extending from the proximal end of the activator module, over the driver housing, beyond the driver end of the activator module, and at least partially along the medicant module.

7. A modular fluid medication injection system according to claim 1 wherein the medicant module further comprises a removable protective sheath provided on the needle.

8. A modular fluid medication injection system according to claim 1 wherein the medicant module further comprises:

a removable protective sheath provided on the needle; and

a sheath remover for engaging and removing the protective sheath from the needle to expose the needle.

9. A modular fluid medication injection system according to claim 1 wherein the medicant module further comprises:

a removable protective sheath provided on the needle; and

a sheath remover for engaging and removing the protective sheath from the needle to expose the needle, the sheath remover having an aperture formed therein that is sized to slide partially onto and frictionally grasp the protective sheath for removal.

10. A modular fluid medication injection system according to claim 1 further comprising:

an assembly coupling to alternately connect and disconnect the medicant module to the activator module, the assembly coupling comprising an activator coupling part provided on the driver end of the activator module and a complimentary medicant coupling part provided on the plunger end of the medicant module.

11. A modular fluid medication injection system according to claim 1 wherein the activator module and the medicant module are detachably connected using a threaded coupling.

12. A modular fluid medication injection system according to claim 1 wherein the medicant module further comprises a removable plunger end cap detachably connectable to the plunger end of the medicant module when the medicant module is disconnected from the activator module, the plunger end cap serving to close the barrel cavity and thereby prevent the syringe subassembly from escaping the barrel cavity when attached to the medicant module and serving to open the barrel cavity and allow removal of the syringe subassembly when detached from the medicant module.

13. A modular fluid medication injection system according to claim 1 wherein the activator module further comprises:

a driver housing having an elongated chamber for supporting the driver therein; and

a removable driver end cap detachably connectable to the driver housing at the driver end of the activator module when the activator module is disconnected from the medicant module.

14. A modular fluid medication injection system according to claim 1 further comprising a removable stop within the medicant module for halting movement of the driver at an extended position.

15. A modular fluid medication injection system according to claim 1 further comprising a removable stop within the medicant module for halting movement of the driver at an extended position, the removable stop being positioned at least partially around the plunger of the syringe subassembly to prevent full discharge movement of the plunger.

16. A medicant module for use in a fluid medication injection system, the medicant module comprising:

a barrel having a cavity therein;

a manually usable syringe subassembly positioned within the barrel slidable within the cavity to allow powered mechanical deployment of the syringe subassembly, the syringe subassembly having;

an ampule for housing fluid medication;

a needle in fluid communication with said ampule;

a plunger for forcing the fluid medication from the ampule through the needle;

said plunger including a plunger shaft and a plunger portion which extends from the ampule to allow manual depression of the plunger to dispense fluid from the ampule;

a removable plunger end cap detachably connectable to the plunger end of the medicant module, the plunger end cap serving to close the barrel cavity and thereby prevent the syringe subassembly from escaping the barrel cavity when attached to the medicant module and serving to open the barrel cavity and allow removal of the syringe subassembly when detached from the medicant module.

17. A modular fluid medication injection system according to claim 16 wherein the barrel extends beyond the plunger at the plunger end of the medicant module to protect the plunger.

18. A modular fluid medication injection system according to claim 16 wherein the medicant module further comprises a biasing spring to force the syringe subassembly toward the plunger end of the medicant module.

19. A modular fluid medication injection system according to claim 16 wherein the medicant module further comprises a removable protective sheath provided on the needle.

20. A modular fluid medication injection system according to claim 16 wherein the medicant module further comprises:

a removable protective sheath provided on the needle; and

a sheath remover for engaging and removing the protective sheath from the needle to expose the needle.

21. A modular fluid medication injection system according to claim 16 wherein the medicant module further comprises:

a removable protective sheath provided on the needle; and

a sheath remover for engaging and removing the protective sheath from the needle to expose the needle, the sheath remover having an aperture formed therein that is sized to slide partially onto and frictionally grasp the protective sheath for removal.