Syringe with syringe closure

Patent metadata

Field	Value
Publication number	US-12303671-B2
Application number	US-202117466083-A
Country	US
Kind code	B2
Filing date	Sep 3, 2021
Priority date	Sep 10, 2020
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A syringe including a barrel, a plunger, and a vented closure. The barrel has a bore, and an end with an opening in communication with the bore and a barrel flange disposed outwardly of the opening. The plunger is disposed in the bore, and is movable along the bore. The vented closure is attached to the barrel at the end, and includes a stopper, a cap and a filter. The stopper is disposed over and/or in the opening in communication with the bore. The cap includes a body disposed over the stopper, and a fastener engaged with the barrel flange. The filter is disposed between the stopper and the cap, or in at least one of the stopper and the cap.

First claim

The invention claimed is:

1. A syringe comprising:
a barrel with a bore, the barrel having an end with an opening in communication with the bore and a barrel flange disposed outwardly of the opening;
a plunger disposed in the bore, the plunger movable along the bore; and
a vented closure attached to the barrel at the end, the vented closure comprising a stopper, a cap and a filter,
the stopper comprising an elastomeric stopper having a first end comprising a plug disposed within the bore and having an outer surface in sealing engagement with the bore, and a second end disposed over the opening and a through lumen extending from the first end to the second end of the plug of the stopper, the stopper further comprising a stopper flange depending from the second end of the stopper outside the bore and against a first surface of the barrel flange,
the cap having a body disposed over the stopper, a through lumen aligned along a common longitudinal axis with the through lumen of the plug of the stopper, and a fastener engaged with the barrel flange securing the stopper flange between the body of the cap and the barrel flange,
the filter disposed between the stopper and the cap and between the respective through lumens of the stopper and the cap,
wherein the fastener of the cap comprises a skirt having at least two sections spaced apart and depending downwardly from the body of the cap in snap fit engagement with a second surface of the barrel flange which is opposed to the first surface of the barrel flange.

2. The syringe according to claim 1 , wherein the barrel flange comprises a collar disposed on the barrel at the end thereof.

3. The syringe according to claim 1 , wherein the fastener further-comprises a plurality of barbs extending from the skirt which engage the barrel flange.

4. The syringe of claim 3 , wherein each barb has a hook surface that abuts the second surface of the barrel flange when in snap fit engagement with the barrel flange.

5. The syringe according to claim 1 , wherein the fastener is attached to the body of the cap by a hinge.

6. The syringe according to claim 1 , wherein the cap is configured to compress the stopper to create a hermetic seal in the bore.

7. The syringe according to claim 1 , wherein the vented closure is removably attached to the barrel.

8. The syringe according to claim 7 , further comprising a plunger handle, and wherein when the removable vented closure is removed from the end of the barrel, the plunger handle is configured to be disposed through the opening and into the bore and attachable to the plunger to control movement of the plunger along the bore.

9. The syringe according to claim 1 , wherein the filter comprises 0.22 micron filter media.

10. The syringe according to claim 1 , wherein the barrel comprises cyclic olefin copolymer.

11. The syringe according to claim 1 , wherein the barrel has a second end opposite the end, the plunger moveable along the bore between the end and the second end, the second end comprising a tip in fluid communication with the bore.

12. A processing set, comprising tubing and at least one syringe according to claim 11 , with the tip of the at least one syringe connected to the tubing.

13. A processing system, comprising a pneumatic driver connected to the closure of a syringe according to claim 1 .

Assignees

• Fenwal Inc

Inventors

• Wegener Christopher J

Classifications

• A61M2005/3123

  having air entrapping or venting means, e.g. purging channels in pistons · CPC title

• A61M2005/3109

  Caps sealing the needle bore by use of, e.g. air-hardening adhesive, elastomer or epoxy resin · CPC title

• A61M5/3202

  Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001) · CPC title

• A61M5/3145

  Filters incorporated in syringes · CPC title

• A61M5/31513 Primary

  Piston constructions to improve sealing or sliding · CPC title