Connection structure and guide wire having the connection structure

Patent metadata

Field	Value
Publication number	US-11654265-B2
Application number	US-202016789832-A
Country	US
Kind code	B2
Filing date	Feb 13, 2020
Priority date	Sep 14, 2016
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A connection structure includes a multi-thread coil formed by winding first metal element wires formed of a first metal and second metal element wires formed of a second metal arranged between a first metal body including the first metal and a second metal body including the second metal. The first metal body is connected to the first metal element wires of the multi-thread coil, and the second metal body is connected to the second metal element wires of the multi-thread coil. The connection structure imparts improved flexibility to the connection between the first and second metal bodies, and an appropriate connection can be provided even when the first and second metal bodies are made of dissimilar metals.

First claim

What is claimed is:

1. A connection structure comprising:
a first metal body comprising a first metal;
a second metal body comprising a second metal; and
a multi-thread coil wrapped around a portion of an outermost circumferential surface of a cylindrical distal end of the first metal body and an outermost circumferential surface of a cylindrical proximal end of the second metal body, the multi-thread coil comprising:
a first element wire comprising the first metal; and
a second element wire comprising the second metal,

wherein:
the first element wire is connected to the outermost circumferential surface of the distal end of first metal body, and
the second element wire is connected to the outermost circumferential surface of the proximal end of the second metal body.

2. The connection structure according to claim 1 , wherein:
the first metal body is not connected to the second element wire, and
the second metal body is not connected to the first element wire.

3. The connection structure according to claim 1 , wherein:
the first element wire and the second element wire are alternately disposed, and
the first element wire is connected to the outermost circumferential surface of the distal end of the first metal body so as to sandwich the second element wire, and the second element wire is connected to the outermost circumferential surface of the proximal end of the second metal body so as to sandwich the first element wire.

4. The connection structure according to claim 2 , wherein:
the first element wire and the second element wire are alternately disposed, and
the first element wire is connected to the outermost circumferential surface of the distal end of the first metal body so as to sandwich the second element wire, and the second element wire is connected to the outermost circumferential surface of the proximal end of the second metal body so as to sandwich the first element wire.

5. The connection structure according to claim 1 , wherein the first metal is a stainless steel alloy, and the second metal is a nickel-titanium alloy.

6. The connection structure according to claim 2 , wherein the first metal is a stainless steel alloy, and the second metal is a nickel-titanium alloy.

7. The connection structure according to claim 3 , wherein the first metal is a stainless steel alloy, and the second metal is a nickel-titanium alloy.

8. The connection structure according to claim 4 , wherein the first metal is a stainless steel alloy, and the second metal is a nickel-titanium alloy.

9. A guide wire comprising:
a core shaft comprising the connection structure according to claim 1 ; and
a coil body covering a distal portion of the core shaft.

10. A guide wire comprising:
a core shaft comprising the connection structure according to claim 2 ; and
a coil body covering a distal portion of the core shaft.

11. A guide wire comprising:
a core shaft comprising the connection structure according to claim 3 ; and
a coil body covering a distal portion of the core shaft.

12. A guide wire comprising:
a core shaft comprising the connection structure according to claim 4 ; and
a coil body covering a distal portion of the core shaft.

13. A guide wire comprising:
a core shaft comprising the connection structure according to claim 5 ; and
a coil body covering a distal portion of the core shaft.

14. The connection structure according to claim 1 , wherein:
the first element wire is connected to the outermost circumferential surface of the distal end of the first metal body by welding, and
the second element wire is connected to the outermost circumferential surface of the proximal end of the second metal body by welding.

Assignees

• Asahi Intecc Co Ltd

Inventors

• Yonezawa Satoshi

Classifications

• A61L2400/16

  Materials with shape-memory or superelastic properties · CPC title

• A61M2025/09133

  having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque · CPC title

• A61M2025/09083

  having a coil around a core · CPC title

• A61M2025/09108

  Methods for making a guide wire · CPC title

• A61M2025/09191

  made of twisted wires · CPC title