Medical port

Patent metadata

Field	Value
Publication number	US-9283366-B2
Application number	US-200913061673-A
Country	US
Kind code	B2
Filing date	Aug 28, 2009
Priority date	Sep 1, 2008
Publication date	Mar 15, 2016
Grant date	Mar 15, 2016

Abstract

A medical port includes a disc-shaped valve 1 in which an insertion hole is formed in a central portion 1 a , a base seat 7 that supports the valve from a lower surface side, and a cover 2 that has a fitting hole exposing an upper surface of the central portion of the valve and covers at least a peripheral edge of the valve from the upper surface side, the fitting hole being formed so that when an inserting body has been inserted into the insertion hole, a fit between the inserting body and the fitting hole can cause the inserting body to be locked against the cover. An annular protrusion 1 d is formed in the valve 1 , the annular protrusion being continuous in the circumferential direction, and formed in the valve 1 so that in the state in which the inserting body is locked against the cover, the annular protrusion is in contact with an outer circumferential surface of a leading end portion of the inserting body.

First claim

The invention claimed is:

1. A medical port comprising:
a disc-shaped valve in which an insertion hole is formed in a central portion;
a base seat that supports the valve from a lower surface side and has a hole; and
a cover that has a fitting hole exposing an upper surface of the central portion of the valve and covers at least a peripheral edge of the valve from the upper surface side,
the fitting hole being formed so that when an inserting body has been inserted into the insertion hole and the hole of the base seat, a fit between the inserting body and the fitting hole can cause the inserting body to be locked against the cover,
wherein an annular protrusion is formed in the valve,
the annular protrusion being formed in a stepped surface that is formed by forming an annular groove around the central portion of the valve so that in a state in which the inserting body is locked against the cover, the annular protrusion is in contact with an outer circumferential surface of a leading end portion of the inserting body,
wherein the cover has an annular hook portion that can engage with the annular groove,
wherein the base seat has an annular projection that is formed along a peripheral edge portion of the hole provided in the base seat and that is positioned outwardly from the annular hook portion in a radial direction,
wherein a portion of the valve that is located outside the annular projection is compressed by the cover and the base seat,
wherein a ring-shaped protrusion located at a radially inner side of the annular projection and surrounding the insertion hole is formed on the lower surface of the valve so that portions of the ring-shaped protrusion are disposed on a straight line extending in the same direction as a longitudinal direction of the insertion hole and in the vicinity of both ends of the insertion hole in the longitudinal direction,
wherein the ring-shaped protrusion is spaced away from the insertion hole by a non-zero distance,
wherein the ring-shaped protrusion and an opening wall surface of the base seat are spaced apart by a distance forming a gap, so that the ring-shaped protrusion is not in contact with the annular projection, in a state in which the inserting body is not inserted in the insertion hole, wherein the open wall surface forms a wall surface of the hole, and
wherein the ring-shaped protrusion has a first radiused surface on a radially inner side of the ring-shaped protrusion, and a second radiused surface on a radially outer side of the ring-shaped protrusion, a height of the ring-shaped protrusion gradually increasing from the radially inner and outer sides toward a middle portion of the ring-shaped protrusion.

2. The medical port according to claim 1 , wherein the annular protrusion is formed from a position in the stepped surface that is below the upper surface of the central portion of the valve.

3. The medical port according to claim 2 , wherein the annular protrusion is formed from a position that is 0.2 mm to 0.6 mm below the upper surface of the central portion of the valve in a vertical direction.

4. The medical port according to claim 1 , wherein the annular protrusion satisfies a relationship below:
0.2≦( W 2− W 1)/2≦0.6

where W 1 is an outer diameter (mm) of the central portion as seen when the valve is viewed from above from its upper surface side, and
W 2 is an outer diameter (mm) of the annular protrusion as seen when the valve is viewed from above from its upper surface side.

5. The medical port according to claim 1 , wherein the annular protrusion has a radiused surface having a radius of curvature of more than 0 mm and not more than 0.4 mm.

6. The medical port according to claim 1 , wherein in the lower surface of the valve, a minimum distance between each of the portions of the ring-shaped protrusion disposed in the vicinity of both ends of the insertion hole in the longitudinal direction and the end of the insertion hole near that portion is more than 0 mm and not more than 0.15 mm.

7. The medical port according to claim 1 , wherein a maximum height of each of the portions of the ring-shaped protrusion disposed in the vicinity of both ends of the insertion hole in the longitudinal direction is 0.2 mm to 0.5 mm.

8. The medical port according to claim 1 , wherein an inner circumference of the ring-shaped protrusion as seen when the valve is viewed from above from its lower surface side has a circular shape.

9. The medical port according to claim 1 , wherein the shape of a cutting plane as seen when the ring-shaped protrusion is cut in a radial direction is the same whichever radial direction the ring-shaped protrusion is cut.

10. The medical port according to claim 1 , wherein the ring-shaped protrusion is located on a radially inner side of the opening wall surface of the base seat.

Assignees

• Okiyama Tadashi
• Tachizaki Hitoshi
• Jms Co Ltd

Inventors

• Okiyama Tadashi
• Tachizaki Hitoshi

Classifications

• A61M2039/0036

  characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer · CPC title

• A61M39/26

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

• A61M2039/0072

  Means for increasing tightness of the septum, e.g. compression rings, special materials, special constructions · CPC title

• A61M39/02 Primary

  Access sites · CPC title

• A61M39/04

  having pierceable self-sealing members · CPC title