Medical injector system

Patent metadata

Field	Value
Publication number	US-11596735-B2
Application number	US-201916595181-A
Country	US
Kind code	B2
Filing date	Oct 7, 2019
Priority date	Nov 25, 2003
Publication date	Mar 7, 2023
Grant date	Mar 7, 2023

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.

First claim

What is claimed is:

1. A syringe comprising:
a syringe body; and
a plunger disposed within the syringe body and engageable with a piston of a fluid injector to move the plunger within the syringe body, the plunger comprising:
a base having a circumferential wall with an inner surface;
a ledge projecting inwardly from the inner surface;
at least one rib projecting inwardly from the inner surface proximal to the ledge; and
a cover attached to the base, the cover having an outer surface at least a portion of which is in contact with an inner surface of the syringe body.

2. The syringe of claim 1 , wherein the base has an annular shape.

3. The syringe of claim 1 , wherein the circumferential wall of the base has a cylindrical shape with a proximal end and a distal end, and wherein the inner surface extends between the proximal end and the distal end.

4. The syringe of claim 1 , wherein the ledge extends continuously around the inner surface of the circumferential wall.

5. The syringe of claim 1 , wherein the ledge is configured to engage one or more retractable pins on an abutment section of the piston.

6. The syringe of claim 1 , wherein the at least one rib abuts the ledge.

7. The syringe of claim 1 , wherein the at least one rib is a plurality of ribs that are circumferentially spaced apart around the inner surface.

8. The syringe of claim 7 , wherein the plurality of ribs are evenly or randomly spaced apart relative to each other.

9. The syringe of claim 1 , wherein the at least one rib is configured to engage an abutment section of the piston.

10. The syringe of claim 1 , wherein the cover is integrally formed with the base.

11. An adapter for a syringe comprising:
a base having a circumferential wall with an inner surface;
a ledge projecting inwardly from the inner surface; and
at least one rib projecting inwardly from the inner surface proximal to the ledge,
wherein the ledge is configured to engage one or more retractable pins on an abutment section of a piston of a fluid injector.

12. A plunger configured for being movably disposed within a body of a syringe, the plunger comprising:
a base having a circumferential wall with an inner surface;
a ledge projecting inwardly from the inner surface;
at least one rib projecting inwardly from the inner surface proximal to the ledge; and
a cover attached to the base member, the cover having an outer surface at least a portion of which is configured for engaging an inner surface of the body of the syringe,
wherein the plunger is engageable with a piston of a fluid injector to move the plunger within the body of the syringe.

13. The plunger of claim 12 , wherein the base has an annular shape.

14. The plunger of claim 12 , wherein the circumferential wall of the base has a cylindrical shape with a proximal end and a distal end, and wherein the inner surface extends between the proximal end and the distal end.

15. The plunger of claim 12 , wherein the ledge extends continuously around the inner surface of the circumferential wall.

16. The plunger of claim 12 , wherein the ledge is configured to engage one or more retractable pins on an abutment section of the piston.

17. The plunger of claim 12 , wherein the at least one rib abuts the ledge.

18. The plunger of claim 12 , wherein the at least one rib is a plurality of ribs that are circumferentially spaced apart around the inner surface.

19. The plunger of claim 18 , wherein the plurality of ribs are evenly or randomly spaced apart relative to each other.

20. The plunger of claim 12 , wherein the at least one rib is configured to engage an abutment section of the piston.

21. The plunger of claim 12 , wherein the cover is integrally formed with the base.

22. The adapter of claim 11 , wherein the ledge extends continuously around the inner surface of the circumferential wall.

23. The adapter of claim 11 , wherein the base has an annular shape.

24. The adapter of claim 11 , wherein the circumferential wall of the base has a cylindrical shape with a proximal end and a distal end, and wherein the inner surface extends between the proximal end and the distal end.

Assignees

• Bayer Healthcare Llc

Inventors

• Cowan Kevin
• Haury John
• Neff Jared

Classifications

• A61M5/1456

  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 title

• A61M2205/502

  User interfaces, e.g. screens or keyboards · CPC title

• A61M5/19

  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 title

• A61M5/14546

  Front-loading type injectors · CPC title

• A61M5/31515

  Connection of piston with piston rod · CPC title