Syringe having a proximal end with an outward extending lip

• US 8,337,456 B2
• Filed: 05/07/2009
• Issued: 12/25/2012
• Est. Priority Date: 12/20/2002
• Status: Active Grant

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Schriver, Ralph E., Spohn, Michael A., Joyce, Thomas P., Grubic, Herbert M., Haury, John A.
• Primary Examiner(s): Sirmons, Kevin C
• Assistant Examiner(s): GILBERT, ANDREW M
• Application Number:
  US12/437,011
• Publication Number:
  US 20090216190A1
• Time in Patent Office: 1,328 Days
• Field of Search: 604/131, 604/151, 604/152, 604/154, 604/155, 604/218
• US Class Current: 604/131
• CPC Class Codes: A61M 2205/14 Detection of the presence or absence of a tube, a connector or a container in an apparatus
• CPC Class Codes: A61M 2205/587 Lighting arrangements
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump
• CPC Class Codes: A61M 5/1458 Means for capture of the plunger flange

Abstract

A syringe includes a body having a distal end, a proximal end and a center section therebetween, a plunger movably disposed in the body, and a hollow alignment flange for orienting and manipulating the syringe.

Claims

1. A syringe, comprising:

a cylindrical main body, a conical portion connected to the main body and having a proximal end defining a radially-outward extending lip, and a discharge outlet connected to the conical portion;

a plunger movably disposed within at least a portion of the main body; and

a hollow alignment flange disposed on and extending outward from at least a portion of the conical portion, the alignment flange defining a fluid-containing area therein;

wherein the plunger has a coupling end comprising a pair of proximally-extending coupling members defining a slot therebetween, the slot substantially aligned with the alignment flange such that the alignment flange provides an indication of the orientation of the slot; and

wherein the alignment flange extends outward sufficiently from the conical portion to be grasped by a user of the syringe and used as a handle for manipulating the syringe.

2. The syringe of claim 1, wherein the coupling members comprise flexible coupling members.

3. The syringe of claim 1, wherein the conical portion comprises a light-sensitive fluid dot as an optical aid.

4. The syringe of claim 1, wherein the alignment flange is rectangular shaped and tapers from a center section to an injection neck.

5. The syringe of claim 1, wherein the discharge outlet is at a distal end of the main body and an expansion section is at a proximal end of the main body.

6. The syringe of claim 5, wherein the plunger is seated for storage in the expansion section prior to movement in the main body.

7. The syringe of claim 6, wherein a wall thickness of the main body narrows to a reduced wall thickness at the expansion section permitting the expansion section to expand under radial outward force exerted by the plunger during storage.

8. The syringe of claim 7, wherein the main body is made of a deformable material permitting the expansion section to expand radially when the plunger is seated in the expansion section for storage.

9. The syringe of claim 1, wherein the radially-outward extending lip extends around the circumference of the proximal end of the main body.

10. A syringe, comprising:

a body having a distal end and a proximal end, the body comprising an injection section at the distal end and an expansion section at the proximal end, the proximal end defining a radially-outward extending lip, the injection section and the expansion section connected by a center section of relatively uniform outer diameter; and

a plunger movably received in the body for movement from the expansion section to the center section and seated for storage in the expansion section prior to movement to the center section, and the plunger comprising a cylindrical portion;

wherein a wall thickness of the body narrows to a reduced wall thickness at the expansion section such that an inner diameter of the expansion section is larger than the inner diameter of the center section allowing the expansion section to expand under radial outward force exerted by the plunger during storage;

wherein the expansion section has an axial length to accommodate the cylindrical portion of the plunger when seated for storage in the expansion section; and

wherein the injection section comprises a conical portion and an injection neck, and wherein the conical portion comprises a hollow alignment flange extending outward from at least a portion of the conical portion, the alignment flange defining a fluid-containing area therein.

11. The syringe of claim 10, wherein the reduced wall thickness allows the expansion section to expand to an outer diameter no greater than approximately the outer diameter of the center section when the plunger is seated in the expansion section.

12. The syringe of claim 10, wherein the body is made of a deformable material permitting the expansion section to expand to an outer diameter no greater than approximately the outer diameter of the center section when the plunger is seated in the expansion section.

13. The syringe of claim 10, wherein an outer surface of the body is tapered or stepped inward toward a central axis of the body and an inner surface of the body is tapered or stepped outward away from the central axis of the body to form the reduced wall thickness.

14. The syringe of claim 10, wherein at least one of an outer surface of the body is tapered or stepped inward toward a central axis of the body and an inner surface of the body is tapered or stepped outward away from the central axis of the body to form the reduced wall thickness.

15. The syringe of claim 10, wherein the plunger has a coupling end comprising a pair of coupling members defining a slot therebetween.

16. The syringe of claim 15, wherein the slot defined between the coupling members is substantially aligned with the alignment flange such that the alignment flange provides an indication of the orientation of the slot.

17. The syringe of claim 15, wherein the coupling members comprise flexible coupling members.

18. The syringe of claim 10, wherein the conical portion further comprises a light-sensitive fluid dot as an optical aid.

19. The syringe of claim 10, wherein the plunger comprises a base member substantially enclosed by a cover to form the cylindrical portion and a conical portion of the plunger.

20. The syringe of claim 10, wherein the alignment flange is rectangular shaped and tapers from the center section to the injection neck.

21. The syringe of claim 10, wherein the radially-outward extending lip extends around the circumference of the proximal end of the body.

22. A syringe, comprising:

a cylindrical body having a distal end and a proximal end, the body comprising an injection section at the distal end and an expansion section at the proximal end, the proximal end defining a radially-outward extending lip, the injection section and expansion section connected by a cylindrical center section of relatively uniform outer diameter, the injection section comprising a conical portion and an injection neck, the conical portion comprising a hollow alignment flange extending outward from at least a portion of the conical portion and defining a fluid-containing area therein;

a plunger movably received in the body for movement from the expansion section to the center section and having a coupling end with a pair of flexible coupling members defining a slot therebetween for engaging a drive piston of an injector, the slot substantially aligned with the alignment flange such that the alignment flange provides an indication of the orientation of the slot, the plunger seated for storage in the expansion section prior to movement to the center section, and the plunger comprising a cylindrical portion;

wherein a wall thickness of the body narrows to a reduced wall thickness at the expansion section such that an inner diameter of the expansion section is larger than the inner diameter of the center section for allowing the expansion section to expand under radial outward force exerted by the plunger during storage; and

wherein the expansion section has an axial length to accommodate the cylindrical portion of the plunger when seated for storage in the expansion section.

23. The syringe of claim 22, wherein the reduced wall thickness allows the expansion section to expand to an outer diameter no greater than approximately the outer diameter of the center section under the radial outward force exerted by the plunger.

24. The syringe of claim 22, wherein the body is made of a deformable material permitting the expansion section to expand to an outer diameter no greater than approximately the outer diameter of the center section under the radial outward force exerted by the plunger.

25. The syringe of claim 22, wherein an outer surface of the body is tapered or stepped inward toward a central axis of the body and an inner surface of the body is tapered or stepped outward away from the central axis of the body to form the reduced wall thickness.

26. The syringe of claim 22, wherein the alignment flange extends outward sufficiently from the conical portion to be grasped by a user of the syringe and used as a handle for manipulating the syringe.

27. The syringe of claim 22, wherein the alignment flange is rectangular shaped and tapers from the center section to the injection neck.

28. The syringe of claim 22, wherein the radially-outward extending lip extends around the circumference of the proximal end of the body.