Medical instrument

• US 4,695,276 A
• Filed: 10/30/1985
• Issued: 09/22/1987
• Est. Priority Date: 11/06/1984
• Status: Expired due to Term

• Current Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Original Assignee: Terumo Kabushiki Kaisha (Terumo Corporation)
• Inventors: Shinno, Kouji, Kuboki, Hitoshi
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): Smith, Jr., Jerome R.
• Application Number:
  US06/792,741
• Time in Patent Office: 692 Days
• Field of Search: 604/28, 604/29, 604/280, 604/283, 604/410, 604/411, 604/414, 604/415, 604/905, 604/177, 128/303 R, 136/272.6
• US Class Current: 604/533
• CPC Class Codes: A61M 25/0014 Connecting a tube to a hub
• CPC Class Codes: Y10S 604/905 Aseptic connectors or couplings, e.g. frangible, piercable

Abstract

A medical instrument for transferring liquid therethrough is provided, comprising a connector of a rigid resin including a generally cylindrical portion having a passage extending throughout the connector and one open end, the cylindrical portion at said one open end including a recess extending circumferentially and axially from the open end, the outside surface of the recess being provided with at least one substantially circumferential rib; and a tube of a flexible resin inserted into the recess and bonded thereto with an adhesive to define a continuous passage communicating the connector and the tube. The connector is formed of a resin which is difficult to bond with a curable adhesive and having a Shore D hardness of at least 55, the tube is formed of a flexible resin which is bondable with a curable adhesive and having a Shore D hardness of not higher than 45, and the joint portions of the connector and the tube are bonded with a ultraviolet-curable adhesive which shows a Shore D hardness of at least 70 after curing.

Claims

1. A medical instrument for transferring liquid therethrough, comprising

a connector of a rigid resin including a generally cylindrical portion having a passage extending throughout the connector and one open end, said cylindrical portion at said one open end including an outer sleeve and an inner sleeve defining therebetween a recess extending circumferentially and axially from the open end, the inside surface of said outer sleeve being provided with at least one substantially circumferential rib, and

a tube of a flexible resin inserted into said recess and bonded thereto with an adhesive to define a continuous passage communicating said connector and said tube, characterized in that

said connector is formed of a rigid resin which is difficult to bond with a curable adhesive and having a Shore D hardness of at least 55,

said tube is formed of a flexible resin which is bondable with a curable adhesive and having a Shore D hardness of not higher than 45, and

the joint portions of said connector and said tube are bonded with a ultraviolet curable adhesive which shows a Shore D hardness of at least 70 after curing.

2. A medical instrument according to claim 1 wherein the outside surface of said inner sleeve is tapered.

3. A medical instrument according to claim 1 or 2 which is sterilized with gamma radiation.

4. A medical instrument according to claim 1 which is a winged infusion needle assembly.

5. A medical instrument according to claim 1 wherein said rigid resin is selected from the group consisting of polypropylene, polyethylene, and polyethylene terephthalate.

6. A medical instrument according to claim 1 wherein said flexible resin is selected from the group consisting of flexible polyvinyl chloride, vinyl chloride elastomers, and styrene elastomers.

7. A medical instrument for transferring liquid therethrough, comprising:

a connector of a rigid resin including a generally cylindrical portion having a passage extending throughout the connector and one open end, said cylindrical portion at said one open end including an outer sleeve and inner sleeve defining therebetween a recess extending circumferentially and axially from the open end, the inside surface of said outer sleeve being provided with at least one substantially circumferential rib; and

a tube of a flexible resin inserted into said recess and bonded thereto with an adhesive to define a continuous passage communicating said connector and said tube;

said connector being formed of a rigid resin which is difficult to bond with a curable adhesive and having a Shore D hardness of at least 55, wherein said rigid resin is selected from the group consisting of polypropylene, polyethylene, and polyethylene terephthalate;

said tube being formed of a flexible resin which is bondable with a curable adhesive and having a Shore D hardness of not higher than 45, wherein said flexible resin is selected from the group consisting of flexible polyvinyl chloride, vinyl chloride elastomers, and styrene elastomers; and

the joint portions of said connector and said tube being bonded with an ultraviolet curable adhesive which shows a Shore D hardness of at least 70 after curing.