Medical stopcock

Patent metadata

Field	Value
Publication number	US-9669207-B2
Application number	US-201414496482-A
Country	US
Kind code	B2
Filing date	Sep 25, 2014
Priority date	Mar 26, 2012
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A medical stopcock device comprises a housing configured to allow a flow of liquid therethrough, and a cock configured to fit in the housing and switch flow paths of the liquid flowing through the housing. The housing comprises a cylindrical body section formed with a through-hole, an upstream port section provided on an outer periphery of the body section, a downstream port section provided on the outer periphery of the body section and disposed on a side of the body section that is opposite to the upstream port section, and a side tube port section provided between the upstream port section and the downstream port section on the outer periphery of the body section and including a first communication hole, and a second communication hole having an opening area smaller than an opening area of the first communication hole. The cock comprises a cylindrical section configured to be inserted in the through-hole of the body section in a slidable manner, and including a first flow path groove and a second flow path groove, and a handle section configured to rotate the cylindrical section. When the cock is at a reference position, the upstream port section, the side tube port section, and the downstream port section communicate with each other in a manner such that the first flow path groove communicates with the upstream port section and the first communication hole in the side tube port section, and the second flow path groove communicates with the second communication hole in the side tube port section and the downstream port section.

First claim

What is claimed is:

1. A medical stopcock device comprising:
a housing configured to allow a flow of liquid therethrough; and
a cock configured to fit in the housing and switch flow paths of the liquid flowing through the housing,
wherein the housing comprises:
a cylindrical body section formed with a through-hole;
an upstream port section provided on an outer periphery of the body section, the upstream port section comprising a female connector;
a downstream port section provided on the outer periphery of the body section and disposed on a side of the body section that is opposite to the upstream port section; and
a side tube port section provided between the upstream port section and the downstream port section on the outer periphery of the body section and including a first communication hole on an upstream port section side of the side tube port section, and a second communication hole on a downstream port section side of the side tube port section,

wherein (i) a height of an inward facing wall of the side tube port section that is adjacent to the downstream port section and defines the second communication hole is greater than (ii) a height of an inward facing wall of the side tube port section that is adjacent to the upstream port section and defines the first communication hole, such that (i) an area of an opening into the second communication hole at a smallest portion of the second communication hole is smaller than (ii) an area of an opening into the first communication hole at a smallest portion of the first communication hole,
wherein the cock comprises:
a cylindrical section configured to be inserted in the through-hole of the body section in a slidable manner, and including a first flow path groove and a second flow path groove; and
a handle section configured to rotate the cylindrical section, and

wherein, when the cock is at a reference position, the upstream port section, the side tube port section, and the downstream port section communicate with each other in a manner such that the first flow path groove communicates with the upstream port section and the first communication hole in the side tube port section, and the second flow path groove communicates with the second communication hole in the side tube port section and the downstream port section.

2. The medical stopcock device according to claim 1 , wherein the first flow path groove comprises:
a liquid introduction section, configured to allow liquid to flow therein;
a plurality of communication sections branching from the liquid introduction section; and
a liquid discharge section, at which the branched communication sections merge, and which faces the first communication hole when the cock is at the reference position.

3. The medical stopcock device according to claim 2 , wherein the liquid discharge section is provided with a projection at a portion where the communication sections merge.

4. The medical stopcock device according to claim 3 , wherein, at a part of the first communication hole, a partition wall is provided, said part facing the projection when the cock is at the reference position.

5. The medical stopcock device according to claim 2 , wherein the liquid discharge section and the second flow path groove communicate with each other through a connection groove.

6. The medical stopcock device according to claim 5 , wherein the connection groove has an opening area smaller than that of the first communication hole and that of the second communication hole.

7. The medical stopcock device according to claim 1 , wherein the cylindrical section has a closing surface configured to close the upstream port section, the side tube port section, and the downstream port section when the cock is rotated by a predetermined amount.

8. The medical stopcock device according to claim 1 , wherein the second flow path groove includes a plurality of communication sections.

9. The medical stopcock device according to claim 1 , further comprising a connector attached to the side tube port section.

10. The medical stopcock device according to claim 9 , wherein the connector comprises a valve.

11. The medical stopcock device according to claim 7 , wherein, when the cock is in a position rotated about 45 degrees from the reference position, the upstream port section, the downstream port section, and the side tube port section are closed.

12. The medical stopcock device according to claim 7 , wherein, when the cock is in a position rotated about 90 degrees from the reference position, the downstream port section and the side tube port section communicate with each other and the upstream port section is closed.

13. The medical stopcock device according to claim 7 , wherein when the cock is in a position rotated about 180 degrees from the reference position, the upstream port section and the downstream port section communicate with each other and the side tube port section is closed.

Assignees

• Terumo Corp

Inventors

• Ueda Yasuhiro

Classifications

• F16K11/08

  comprising only taps or cocks · CPC title

• A61M2039/2426

  Slit valve · CPC title

• F16K11/0856

  having all the connecting conduits situated in more than one plane perpendicular to the axis of the plug · CPC title

• A61M39/105 Primary

  Multi-channel connectors or couplings, e.g. for connecting multi-lumen tubes (multi-channel connectors in general F16L37/56) · CPC title

• F16K11/087

  with spherical plug · CPC title