Stopcock Valve

• US 20080319401A1
• Filed: 02/07/2008
• Published: 12/25/2008
• Est. Priority Date: 02/08/2007
• Status: Active Grant

• Current Assignee: Kpr U.S., LLC (Cardinal Health, Inc.)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Funamura, Shigeaki, Kitani, Ichiro, Sakai, Yosuke
• Granted Patent: US 8,317,758 B2
• Time in Patent Office: Days
• US Class Current: 604/248
• CPC Class Codes: A61M 39/223 Multiway valves
• CPC Class Codes: Y10T 137/86863 Rotary valve unit
• CPC Class Codes: Y10T 137/87072 Rotation about either of two pivotal axes

Abstract

A medical stopcock which allows easier switching operation of plural branch-tubes. The main body of the stopcock comprises a chamber part with a nearly spherical inner surface, and an upstream branch-tube, a downstream branch-tube and a merge-branch-tube all extending from the chamber part. A valve body of the stopcock comprises a nearly spherical valve main body and a rod-shaped operating part with a guide hole linking the inner surface of the chamber part to the outside. In operation, the rod-shaped operating part is moved along the guide hole through the use of the horizontal flow passages and the vertical flow passage to allow the predetermined branch-tubes out of the upstream branch-tube, the downstream branch-tube and the merge-branch-tube to communicate with one another or to shut-off the communication.

Claims

1. A medical stopcock comprising a medical stopcock main body including:

a chamber part having an open space part the inner surface of which is formed approximately spherically and a guide hole located at a predetermined position of said inner surface through to the outside,

plural branch-tubes each of which having a flow passage spaced from the outer peripheral surface of said chamber part and extending outward respectively to communicate with inside said chamber part,

a valve main body comprising an approximately spherical body installed in the said chamber part and provided with flow passages formed at a predetermined position thereon and capable of allowing predetermined branch-tubes out of said plural branch-tubes to communicate with one another through the use of said flow passages or of shutting-off the communication by rotationally moving along the inner surface of said chamber part and

a rod-shaped operating part allowing the flow passages of said valve main body to communicate with predetermined branch-tubes out of said plural branch-tubes, or shutting-off the communication by passing through said guide hole from the outer peripheral surface of said valve main body and extending outward and by moving along said guide hole.

2. A medical stopcock according to claim 1, wherein said plural branch-tubes are comprised of:

a pair of horizontal branch-tubes extending from both sides of the outer peripheral surface of said chamber part outward;

a vertical branch-tube extending from the top side of the outer peripheral surface of said chamber part upward, wherein the flow passages of said valve main body are comprised of;

horizontal flow passages capable of allowing said pair of horizontal branch-tubes to communicate with one another or shut-off the communication; and

a vertical flow passage capable of allowing said horizontal flow passages to communicate with said vertical branch-tube or shutting-off the communication.

3. A medical stopcock according to claim 2, wherein said stopcock is capable of allowing said pair of horizontal branch-tubes to communicate with one another or shut-off the communication by moving said rod-shaped operating part along said horizontal guide hole, and further capable of allowing said horizontal flow passages to communicate with said vertical branch-tube by moving said rod-shaped operating part along said the vertical guide hole, or shutting-off the communication, wherein said guide hole is comprised of a horizontal guide hole extending in the horizontal direction and a vertical guide hole extending upward or downward from the approximately center of said horizontal guide hole.

4. A medical stopcock according to claim 1, wherein said plural branch-tubes comprise a pair of horizontal branch-tubes extending from both sides of the outer peripheral surface of said chamber part outward and a vertical branch-tube extending from the top side of the outer peripheral surface of said chamber part upward, and that the flow passages of said valve main body is comprised of horizontal flow passages capable of allowing said pair of horizontal branch-tubes to communicate with one another or shut-off the communication and a vertical flow passage allowing said horizontal flow passages to constantly communicate with said vertical branch-tube.

5. A medical stopcock according to claim 4, wherein said stopcock is capable of allowing said pair of horizontal branch-tubes to communicate with one another or shut-off the communication by moving said rod-shaped operating part along said horizontal guide hole, wherein said guide hole is comprised of a horizontal guide hole extending in the horizontal direction.

6. A medical stopcock according to claim 2, wherein both side positions opposing respectively to the flow passages of said pair of horizontal branch-tubes in the horizontal flow passages of said valve main body is formed in such as manner that, with the condition in which the horizontal flow passages of said valve main body are made to communicate with the flow passages of said pair of horizontal branch-tubes respectively, when said valve main body is rotated to one side in the horizontal direction by the predetermined angle, the communication condition between said horizontal flow passages and the flow passages of said pair of branch-tubes of one side branch-tube is maintained, but said horizontal flow passages and the flow passages of said pair of branch-tubes of the other branch-tube are shut-off, whereas when said valve main body is rotated to the other side in the horizontal direction by the predetermined angle, the communication condition between said horizontal flow passages and the flow passages of said other branch-tube is maintained, but said horizontal flow passages and the flow passages of said one of branch-tubes are shut-off.

7. A medical stopcock according to claim 5, wherein both side portions opposing respectively to the flow passages of said pair of horizontal branch-tubes in the horizontal flow passages of said valve main body is formed in such as manner that, with the condition in which the horizontal flow passages of said valve main body are made to communicate with the flow passages of said pair of horizontal branch-tubes respectively, when said valve main body is rotated to one side in the horizontal direction by the predetermined angle, the communication condition between said horizontal flow passages and the flow passages of said pair of branch-tubes of one side branch-tube is maintained, but said horizontal flow passages and the flow passages of said pair of branch-tubes of the other branch-tube are shut-off, whereas when said valve main body is rotated to the other side in the horizontal direction by the predetermined angle, the communication condition between said horizontal flow passages and the flow passages of said other branch-tube is maintained, but said horizontal flow passages and the flow passages of said one of branch-tubes are shut-off.