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Details for Patent: 5,833,669

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Details for Patent: 5,833,669

Title: Medicine injection syringe constructions
Abstract:Converters for use with commercially available syringe cartridges to produce novel syringe assemblies. The converters engage with the plunger end of the syringe cartridge. The converter has a body piece with a receptacle. The ampule of a syringe cartridge is inserted into and secured within the receptacle. A plunger shaft allows manual displacement of the plunger. In some embodiments, dose regulating features are preferably included as part of the converter assembly. In one form the dose regulating features include removable collars.
Inventor(s): Wyrick; Ronald E. (Spokane, WA)
Assignee: Washington Biotech Corp. (Spokane, WA)
Filing Date:Jun 16, 1995
Application Number:08/491,041
Claims:1. A medicine injection syringe assembly, comprising:

an injection cartridge having an ampule in which fluid medication is held, a needle through which fluid medication is injected, and a plunger;

a converter body having an engagement end and an outward end;

a self-locking receiver formed in the converter body; said receiver being engaged with a plunger end of the injection cartridge; said receiver including a receiver receptacle which opens at the engagement end and has inwardly facing surfaces;

at least one self-locking constriction formed along the inwardly facing surfaces of the receiver receptacle; said at least one constriction being sized to allow insertion of said plunger end of the injection cartridge; said at least one constriction further being sized to engage outward surfaces of the injection cartridge along the plunger end thereof to develop restraining forces between the injection cartridge and said at least one constriction from insertion of the plunger end into the receptacle to provide a self-locking action between the cartridge and converter body when the cartridge is inserted into the receiver;

wherein the at least one self-locking constriction includes an inwardly facing approximately conical surface which converges inwardly advancing into the receptacle;

a shaft aperture formed in the converter body and passing through the outward end thereof;

a plunger shaft connected to the plunger and extending through the shaft aperture.

2. A medicine injection syringe assembly according to claim 1 and further comprising at least one grip feature formed upon outer surfaces of the converter body.

3. A medicine injection syringe assembly, comprising:

an injection cartridge having an ampule in which fluid medication is held, a needle through which fluid medication is injected, and a plunger;

a converter body having a proximal end and a distal end;

a self-locking receiver formed by said converter body; said self-locking receiver having a receptacle which opens at said proximal end, the receptacle being configured to receive and tightly secure the injection cartridge when a plunger end of the cartridge is inserted into the receptacle; said plunger end being engaged by the self-locking receiver to secure the injection cartridge to the converter body;

wherein the receptacle is conically shaped and configured such that a plunger end of the injection cartridge can be wedged tightly into the receptacle;

a shaft aperture opening into the receptacle and being configured to allow insertion of a plunger shaft therethrough;

a plunger shaft connected to the plunger and extending through the shaft aperture.

4. A medicine injection syringe assembly according to claim 3 and further comprising one or more gripping members upon outer surfaces of the converter body for gripping by one or more fingers of a human hand.

5. A medicine injection syringe assembly according to claim 3 wherein the receptacle has inward surfaces which converge advancing into the receptacle; said inward surfaces converging at a convergence angle less than 5.degree. of arc.

6. A medicine injection syringe assembly according to claim 3 wherein the receptacle has inward surfaces which converge advancing into the receptacle; said inward surfaces converging at a convergence angle less than 2.degree. of arc.

7. A medicine injection syringe assembly according to claim 3 wherein the receptacle has inward surfaces which converge advancing into the receptacle; said inward surfaces converging at a convergence angle in the approximate range of 0.05.degree.-1.degree. of arc.

8. A medicine injection syringe assembly according to claim 3 wherein the converter body is an integral piece.

9.

10. A medicine injection syringe assembly according to claim 3 wherein the receiver has receiver sidewalls with wall thickness generally less than 0.1 inch.

11. A medicine injection syringe assembly according to claim 3 wherein the receiver has receiver sidewalls with wall thickness generally less than 0.05 inch.

12. A medicine injection syringe assembly according to claim 3 wherein the receiver has receiver sidewalls with wall thickness generally less than 0.03 inch.

13. A medicine injection syringe assembly according to claim 3 wherein the receiver has receiver sidewalls with wall thickness in the range of approximately 0.01-0.03 inch.

14. A medicine injection syringe assembly, comprising:

an injection cartridge having an ampule in which fluid medication is held, a needle through which fluid medication is injected, and a plunger;

a converter body having a proximal end and a distal end;

a self-locking receiver formed by said converter body; said self-locking receiver having a receptacle which opens at said proximal end, the receptacle being configured to receive and tightly secure the injection cartridge when a plunger end of the cartridge is inserted into the receptacle; said plunger end being engaged by the self-locking receiver to secure the injection cartridge to the converter body;

wherein the receiver has receiver sidewalls which distort in response to insertion of an injection cartridge therein to assist in performing a self-locking function;

a shaft aperture opening into the receptacle and being configured to allow insertion of a plunger shaft therethrough;

a plunger shaft connected to the plunger and extending through the shaft aperture.

15. A medicine injection syringe assembly according to claim 14 and further comprising one or more gripping members upon outer surfaces of the converter body for gripping by one or more fingers of a human hand.

16. A medicine injection syringe assembly according to claim 14 wherein the receptacle is configured such that a plunger end of an injection cartridge is wedged tightly into the receptacle as a result of inserting said plunger end into the receptacle.

17. A medicine injection syringe assembly according to claim 14 wherein the receptacle is conically shaped and configured such that a plunger end of the injection cartridge can be wedged tightly into the receptacle.

18. A medicine injection syringe assembly according to claim 14 wherein the receptacle has a cross-sectional area which decreases into the receptacle.

19. A medicine injection syringe assembly according to claim 14 wherein the receptacle has inward surfaces which converge advancing into the receptacle.

20. A medicine injection syringe assembly according to claim 14 wherein the receptacle has inward surfaces which converge advancing into the receptacle, said inward surfaces converging at a convergence angle less than 5.degree. of arc.

21. A medicine injection syringe assembly according to claim 14 wherein the receptacle has inward surfaces which converge advancing into the receptacle, said inward surfaces converging at a convergence angle less than 2.degree. of arc.

22. A medicine injection syringe assembly according to claim 14 wherein the receptacle has inward surfaces which converge advancing into the receptacle, said inward surfaces converging at a convergence angle in the approximate range of 0.05.degree.-1.degree. of arc.

23. A medicine injection syringe assembly according to claim 14 wherein the receptacle has inward surfaces which converge advancing into the receptacle, said receptacle having increasing convergence advancing into the receptacle.

24. A medicine injection syringe assembly according to claim 14 wherein the receptacle has inward surfaces which converge advancing into the receptacle, said receptacle having at least two convergence regions having increasing convergence advancing into the receptacle.

25. A medicine injection syringe assembly according to claim 14 wherein the converter body is an integral piece.

26. A medicine injection syringe assembly according to claim 14 wherein the receiver has receiver sidewalls with wall thickness generally less than 0.1 inch.

27. A medicine injection syringe assembly according to claim 14 wherein the receiver has receiver sidewalls with wall thickness generally less than 0.05 inch.

28. A medicine injection syringe assembly according to claim 14 wherein the receiver has receiver sidewalls with wall thickness generally less than 0.03 inch.

29. A medicine injection syringe assembly according to claim 14 wherein the receiver has receiver sidewalls with wall thickness in the range of approximately 0.01-0.03 inch.

30. A medicine injection syringe assembly according to claim 14 wherein the self-locking receiver further includes inwardly projecting extensions formed along said receiver sidewalls.

31. A medicine injection syringe assembly according to claim 14 wherein the converter further comprises a dose regulator for regularizing the amount of fluid injected from the syringe assembly.

32. A medicine injection syringe assembly according to claim 14 wherein the converter further comprises a dose regulator for regularizing the amount of fluid injected from the syringe assembly; said dose regulator having at least one removable stop.

33. A medicine injection syringe assembly according to claim 14 wherein the converter further comprises a dose regulator for regularizing the amount of fluid injected from the syringe assembly; said dose regulator having at least one removable stop; at least one removable stop being connected to the plunger shaft.

34. A medicine injection syringe assembly according to claim 14 wherein the converter further comprises a dose regulator for regularizing the amount of fluid injected from the syringe assembly; said dose regulator having at least one removable stop; at least one removable stop being connected to the converter body.

35. A medicine injection syringe assembly according to claim 14 wherein the converter further comprises a dose regulator for regularizing the amount of fluid injected from the syringe assembly; said dose regulator having a plurality of stops which limit the travel of the plunger shaft.

36. A medicine injection syringe assembly according to claim 14 wherein the converter further comprises a dose regulator for regularizing the amount of fluid injected from the syringe assembly; said dose regulator having a plurality of removable stops which limit the travel of the plunger shaft.
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