Syringe with extendable and retractable needle

• US 20090157012A1
• Filed: 12/13/2007
• Published: 06/18/2009
• Est. Priority Date: 12/13/2007
• Status: Abandoned Application

• Current Assignee: Luc Magne
• Original Assignee: University of Victoria Innovation and Development Corporation
• Inventors: Magne, Luc
• Application Number:
  US12/002,117
• Publication Number:
  US 20090157012A1
• Time in Patent Office: Days
• US Class Current: 604/198
• CPC Class Codes: A61M 2205/59 Aesthetic features, e.g. distraction means to prevent fears of child patients
• 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 5/3243 being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel devices for protecting guide needles in combination with catheters A61M25/0612

Abstract

A syringe for use with a carpule and needle is provided. The syringe comprises: (i) a holder for accepting the carpule, the holder comprising at least two linearly disposed first mating members; (ii) a plunger for engagement with the holder; and (iii) a shell for slidably housing the holder, the shell having a distal aperture and a proximal aperture, with a bore therebetween, the shell comprising at least one integral biased member proximate to the proximal aperture, the biased member having a second mating member proximate to a distal end, for mating with the first mating member, such that in a first position, the needle is housed within the shell and in a second position, the needle extends at least partially from the shell.

Claims

1. A syringe for use with a carpule and needle, the syringe comprising:

(i) a holder for accepting the carpule, the holder comprising at least two linearly disposed first mating members;

(ii) a plunger for engagement with the holder; and

(iii) a shell for slidably housing the holder, the shell having a distal aperture and a proximal aperture, with a bore therebetween, the shell comprising at least one integral biased member proximate to the proximal aperture, the biased member having a second mating member proximate to a distal end, for mating with the first mating member, such that in a first position, the needle is housed within the shell and in a second position, the needle at least partially extends from the shell.

2. The syringe of claim 1 wherein the first mating member and the second mating member are a depression-protrusion pair.

3. The syringe of claim 2 wherein the first mating member is a depression and the second mating member is a protrusion.

4. The syringe of claim 3 wherein the proximal aperture and the holder are suitably shaped for slidable engagement with one another in one of two selected orientations.

5. The syringe of claim 4, wherein the holder further comprises a channel in gaseous communication with the ambient environment, to permit self aspiration of the holder.

6. The syringe of claim 5 wherein at least a portion of the shell adjacent the carpule comprises a window.

7. The syringe of claim 6 wherein the window is comprised of transparent material.

8. The syringe of claim 7 wherein the shell is transparent.

9. The syringe of claim 8 wherein the shell is textured proximate to the distal aperture, to conceal the needle.

10. The syringe of claim 9 wherein the shell proximate to the proximal aperture has an outer coating of a compliant polymeric material.

11. The syringe of claim 10 wherein the shell has two integral biased members.

12. The syringe of claim 11 wherein the compliant polymeric material is shaped into a child-friendly shape.

25. The syringe of claim 11 wherein the shell is injection molded.

13. A combination comprising:

(a) a needle;

(b) a carpule; and

(c) a syringe, the syringe comprising;

(i) a holder for accepting the carpule, the holder comprising at least two linearly disposed first mating members;

(ii) a plunger for engagement with the holder; and

(iii) a shell for slidably housing the holder, the shell having a distal aperture and a proximal aperture, with a bore therebetween, the shell comprising at least one integral biased member proximate to the proximal aperture, the biased member having a second mating member proximate to a distal end, for mating with the first mating member, such that in a first position, the needle is housed within the shell and in a second position, the needle extends at least partially from the shell.

14. The syringe of claim 13 wherein the first mating member and the second mating member are a depression-protrusion pair.

15. The syringe of claim 14 wherein the first mating member is a depression and the second mating member is a protrusion.

16. The combination of claim 15 wherein the proximal aperture and the holder are suitably shaped for slidable engagement with one another in one selected orientation.

17. The combination of claim 16, wherein the holder further comprises a channel in gaseous communication with the ambient environment, to permit self aspiration of the holder.

18. The combination of claim 17 wherein at least a portion of the shell adjacent the carpule comprises a window.

19. The combination of claim 18 wherein the window is comprised of transparent material.

20. The combination of claim 17 wherein the shell is transparent.

21. The combination of claim 20 wherein the shell is textured proximate to the distal aperture, to conceal the needle.

22. The combination of claim 21 wherein the shell proximate to the proximal aperture has an outer coating of a compliant polymeric material.

23. The syringe of claim 22 wherein the shell has two integral biased members.

24. The combination of claim 23 wherein the compliant polymeric material is shaped into a child-friendly shape.