Disposable syringe for use with pneumatic drivers

Patent metadata

Field	Value
Publication number	US-11684725-B2
Application number	US-201916701742-A
Country	US
Kind code	B2
Filing date	Dec 3, 2019
Priority date	Dec 19, 2018
Publication date	Jun 27, 2023
Grant date	Jun 27, 2023

Abstract

A disposable syringe for use with a pneumatic driver. The syringe has an elongated barrel with a cap secured to the proximal end that has a through bore. A filter is secured to the cap interior of the barrel that covers an opening in the through bore interior of the barrel. The pneumatic driver includes a source of pressurized air; a support for receiving and locating the syringe; and a supply block configured to receive pressurized air from the source and having an outlet for delivery of pressurized air. The supply block is movable between a first position spaced apart from the cap of the syringe and a second position in contact with the cap with fluid communication being established between the outlet of the supply block and the through-bore in the cap.

First claim

The invention claimed is:

1. A disposable syringe comprising:
a) an elongated tubular barrel having a first end and a second end, the barrel being open on the first end and tapering to a hollow tip on the second end;
b) a cap secured to the first end of the barrel having a through-bore;
c) a filter secured to the cap and located within an interior of the barrel and covering an opening in the through-bore within the interior of the barrel; and
d) a plunger head mounted to a piston and received within the interior of the barrel, the plunger head engaging an interior wall of the barrel and being slidable within the barrel between the first and second ends.

2. The syringe of claim 1 wherein the barrel further comprises a collar at the first end and extending laterally from the barrel, and the cap is mounted to the collar.

3. The syringe of claim 1 wherein the tip further comprises a luer lock.

4. The syringe of claim 1 wherein the through-bore is configured to receive the tip of a second syringe.

5. The syringe of claim 1 wherein the cap further comprises a luer lock extending exterior of the barrel and defining an exterior opening in the through-bore.

6. The syringe of claim 1 wherein the filter is configured to form a luer lock.

7. The syringe of claim 6 wherein the piston further comprises a hollow interior configured to receive the luer lock formed by the filter.

8. The syringe of claim 1 wherein the barrel further comprises an annular, inwardly-projecting ridge adjacent the first end for sealingly engaging the cap.

9. The syringe of claim 8 wherein the cap comprises an annular, radially-projecting seal for engaging the circumferential, inwardly-projecting ridge at the first end of the barrel.

10. The syringe of claim 1 further comprising a gasket secured to the piston for engaging the interior wall of the barrel.

11. The syringe of claim 1 wherein the cap is removably secured to the barrel.

12. The syringe of claim 1 wherein the cap further comprises a seal encircling an opening in the through-bore exterior to the barrel.

Assignees

• Fenwal Inc

Inventors

• Brown Robert

Classifications

• A61J1/05

  for collecting, storing or administering blood, plasma or medical fluids {(multiple bags systems for separating or storing blood components A61M1/0209); Infusion or perfusion containers} · CPC title

• A61M1/3692

  Washing or rinsing blood or blood constituents · CPC title

• A61M1/0281

  Apparatus for treatment of blood or blood constituents prior to transfusion, e.g. washing, filtering or thawing · CPC title

• A61M2205/273

  preventing reuse, e.g. of disposables · CPC title

• B01L2300/042

  Caps; Plugs · CPC title