Medical injector system

• US 10,434,249 B2
• Filed: 10/28/2016
• Issued: 10/08/2019
• Est. Priority Date: 11/25/2003
• Status: Expired due to Term

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Cowan, Kevin P., Haury, John H., Neff, Jared E.
• Primary Examiner(s): Lee, Brandy S
• Application Number:
  US15/337,752
• Publication Number:
  US 20170043082A1
• Time in Patent Office: 1,075 Days
• CPC Class Codes: A61M 2005/14553 comprising a pressure jacket
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• 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
• CPC Class Codes: A61M 5/19 having more than one chamber , e.g. including a manifold coupling two parallelly aligned syringes through separate channels to a common discharge assembly surgical glue applicators A61B17/00491
• 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 5/31513 Piston constructions to improve sealing or sliding
• CPC Class Codes: A61M 5/31515 Connection of piston with piston rod

Abstract

A syringe includes a body and a plunger movably disposed within the body. The syringe may be used with an injector including a drive member. The drive member preferably includes at least one pin adapted to form a retractable abutting connection with an interior of a plunger to enable the drive member to retract the plunger with the body of the syringe.

Claims

1. A syringe comprising:

a syringe body; and

a plunger movably disposed within the syringe body and configured to engage a piston of a fluid injector for moving the plunger within the syringe body, the plunger comprising;

an annular base member comprising a cylindrical wall extending in a longitudinal direction, wherein the cylindrical wall comprises a proximal end, a distal end, and an inner surface between the proximal end and the distal end;

a retaining shoulder projecting inwardly from and extending around the inner surface of the cylindrical wall; and

a plurality of flanges proximal to the retaining shoulder and projecting inwardly from the inner surface of the cylindrical wall.

2. The syringe of claim 1, wherein the plurality of flanges are radially spaced apart around the inner surface of the cylindrical wall.

3. The syringe of claim 1, wherein the plurality of flanges are evenly spaced apart around the inner surface of the cylindrical wall.

4. The syringe of claim 1, wherein the plurality of flanges are randomly spaced apart around the inner surface of the cylindrical wall.

5. The syringe of claim 1, wherein the plurality of flanges extend inwardly to decrease a diameter of the cylindrical wall defined by the inner surface.

6. The syringe of claim 1, wherein the plurality of flanges are configured to engage an abutment section of the piston.

7. The syringe of claim 1, wherein the retaining shoulder is configured to engage one or more radially retractable pins on an abutment section of the piston.

8. The syringe of claim 1, wherein the plunger further comprises a seal having a seal outer surface adapted to slidingly engage with an inner surface of the syringe body and a seal inner surface adapted to engage the plunger.

9. The syringe of claim 1, wherein the plurality of flanges are configured to engage an abutment section of the piston distally from a circumferential ledge at the proximal end of the cylindrical wall.

10. A plunger configured for being movably disposed within a body of a syringe, the plunger comprising:

an annular base member comprising a cylindrical wall extending in a longitudinal direction, wherein the cylindrical wall comprises a proximal end, a distal end, and an inner surface between the proximal end and the distal end;

a retaining shoulder projecting inwardly from and extending around the inner surface of the cylindrical wall; and

a plurality of flanges proximal to the retaining shoulder and projecting inwardly from the inner surface of the cylindrical wall,

wherein the plunger is configured to engage a piston of a fluid injector for moving the plunger within the syringe body.

11. The plunger of claim 10, wherein the plurality of flanges are evenly spaced apart around the inner surface of the cylindrical wall.

12. The plunger of claim 10, wherein the plurality of flanges extend inwardly to decrease a diameter formed by the inner surface of the cylindrical wall.

13. The plunger of claim 10, wherein the plurality of flanges are configured to engage an abutment section of the piston.

14. The plunger of claim 10, wherein the retaining shoulder is configured to engage one or more radially retractable pins on an abutment section of the piston.

15. The plunger of claim 10, further comprising a seal having a seal outer surface adapted to slidingly engage with an inner surface of the syringe body and a seal inner surface adapted to engage the plunger.

16. A syringe comprising:

a syringe body; and

a plunger movably disposed within the syringe body, the plunger comprising;

an annular base member comprising a cylindrical wall extending in a longitudinal direction, wherein the cylindrical wall comprises a proximal end, a distal end, and an inner surface between the proximal end and the distal end;

a retaining shoulder projecting inwardly from and extending around the inner surface of the cylindrical wall; and

a plurality of flanges proximal to the retaining shoulder and projecting inwardly from the inner surface of the cylindrical wall,

wherein the retaining shoulder is configured to engage one or more radially retractable pins on an abutment section of a piston configured for moving the plunger within the syringe body.

17. The syringe of claim 16, wherein the plurality of flanges are radially spaced apart around the inner surface of the cylindrical wall.

18. The syringe of claim 16, wherein the plurality of flanges are evenly spaced apart around the inner surface of the cylindrical wall.

19. The syringe of claim 16, wherein the plurality of flanges are randomly spaced apart around the inner surface of the cylindrical wall.

20. The syringe of claim 16, wherein the plurality of flanges extend inwardly to decrease a diameter of the cylindrical wall defined by the inner surface.

21. The syringe of claim 16, wherein the plurality of flanges are configured to engage one or more outwardly extending flange members on the piston configured for moving the plunger within the syringe body.

22. The syringe of claim 16, wherein the plunger further comprises a seal having a seal outer surface adapted to slidingly engage with an inner surface of the syringe body and a seal inner surface adapted to engage the plunger.

23. The syringe of claim 16, wherein the plurality of flanges are configured to engage the abutment section of the piston distally from a circumferential ledge at the proximal end of the cylindrical wall.

24. A plunger configured for being movably disposed within a body of a syringe, the plunger comprising:

an annular base member comprising a cylindrical wall extending in a longitudinal direction, wherein the cylindrical wall comprises a proximal end, a distal end, and an inner surface between the proximal end and the distal end;

a retaining shoulder projecting inwardly from and extending around the inner surface of the cylindrical wall; and

a plurality of flanges proximal to the retaining shoulder and projecting inwardly from the inner surface of the cylindrical wall,

wherein the retaining shoulder is configured to engage one or more radially retractable pins on an abutment section of a piston configured for moving the plunger within the syringe body.

25. The plunger of claim 24, wherein the plurality of flanges are evenly spaced apart around the inner surface of the cylindrical wall.

26. The plunger of claim 24, wherein the plurality of flanges extend inwardly to decrease a diameter formed by the inner surface.

27. The plunger of claim 24, wherein the plurality of flanges are configured to engage the abutment section of the piston configured for moving the plunger within the syringe body.

28. The plunger of claim 24, further comprising a seal having a seal outer surface adapted to slidingly engage with an inner surface of the syringe body and a seal inner surface adapted to engage the plunger.