Connector

Patent metadata

Field	Value
Publication number	US-10046153-B2
Application number	US-201514666931-A
Country	US
Kind code	B2
Filing date	Mar 24, 2015
Priority date	Sep 28, 2012
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A connector includes in a main body, first to third ports each having a flow channel allowing inflow or outflow of an infusion solution, an internal flow channel configured to communicate between flow channels of the first port and the second port, and a through hole connected to an internal flow channel. In the internal flow channel, an upstream side wall surface is provided which guides infusion solution flowing into the internal flow channel from the first port to the through hole, and reduces the cross-sectional area of the flow channel for the infusion solution near the through hole relative to the cross-sectional area of the flow channel of the first port in order to increase a flow rate of the infusion solution.

First claim

What is claimed is:

1. A connector comprising:
a main body including a housing and a cap;
a first port, a second port and a third port provided at the main body, the first port, the second port and the third port each having a flow channel allowing inflow or outflow of fluid;
an internal flow channel provided in the main body, the internal flow channel configured to communicate between the flow channel of the first port and the flow channel of the second port;
a space portion provided in the third port and connected in fluid communication with the internal flow channel; and
a protruding portion extending from an axial center of the internal flow channel toward the third port, the protruding portion being integral with the housing; wherein the protruding portion includes a wall surface provided in the internal flow channel, the wall surface facing the flow channel of the first port, and the wall surface being spaced from an end wall of the housing which defines a boundary between the flow channel of the first port and the internal flow channel such that the wall surface is configured to guide fluid flowing into the internal flow channel from the first port to the space portion;
wherein the wall surface reduces a cross-sectional area of a flow channel for fluid near the space portion relative to a cross-sectional area of the flow channel of the first port;
wherein the wall surface includes a notched portion positioned along an axial center of the internal flow channel, the notched portion including an opening in an upper surface of the protruding portion and an opening in the wall surface.

2. The connector according to claim 1 , wherein the wall surface faces substantially perpendicularly to an axial direction of the flow channel of the first port.

3. The connector according to claim 2 , wherein the protruding portion further includes a downstream side wall surface facing the flow channel of the second port, and the downstream side wall surface is connected from an upper part of the wall surface and inclined toward a bottom surface of the flow channel of the second port.

4. The connector according to claim 1 , wherein the wall surface has an upper part projecting above a height of the flow channel of the first port.

5. The connector according to claim 1 , wherein the third port is perpendicular to an axial direction of the first port and the second port.

6. The connector according to claim 1 , wherein the third port include an elastically deformable valve.

7. The connector according to claim 6 , wherein the valve is configured to open when a connector portion is inserted into the third port.

8. The connector according to claim 1 , wherein a ratio between the cross-sectional are of the flow channel of the first port and the cross-sectional area of the flow channel near the space portion is 75% or less.

9. The connector according to claim 1 , wherein the notched portion has a width smaller than an inner diameter of the flow channel of the first port.

10. An infusion set comprising:
a connector according to claim 1 ;
a first tube connected to the first port of the connector and configured to allow a first infusion solution to flow from the first tube through the first port to the internal flow channel;
a second tube connected to the second port of the connector and configured to allow the first infusion solution to flow from the internal flow channel through the second port and the second tube;
wherein the wall surface is configured to increase a flow rate of the first infusion solution flowing from the first port to the internal flow channel.

11. The infusion set according to claim 10 , wherein the wall surface faces substantially perpendicularly to an axial direction of the flow channel of the first port.

12. The infusion set according to claim 10 , wherein the third port is perpendicular to an axial direction of the first port and the second port.

13. The infusion set according to claim 10 , further comprising a third tube connected to the third port and configured to allow a second infusion solution to flow from the third tube through the third port to the internal flow channel.

14. The infusion set according to claim 13 , wherein the third port includes an elastically deformable valve.

15. The infusion set according to claim 14 , wherein the third tube includes a connection portion for opening the valve when the third tube is connected to the third port.

Assignees

• Terumo Corp

Inventors

• Ueda Yasuhiro
• Takahashi Tsukasa

Classifications

• A61M39/045 Primary

  pre-slit to be pierced by blunt instrument · CPC title

• A61M39/10

  Tube connectors; Tube couplings {(A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014)} · CPC title

• A61M39/26

  Valves closing automatically on disconnecting the line and opening on reconnection thereof {(check valves A61M39/24)} · CPC title

• A61M39/1011

  Locking means for securing connection; Additional tamper safeties (A61M39/16 takes precedence) · CPC title

• F16L37/38

  with fluid cut-off means in only one of two pipe-end fittings · CPC title