Method of manufacturing ultrasonic treatment tool

Patent metadata

Field	Value
Publication number	US-12564875-B2
Application number	US-202217873358-A
Country	US
Kind code	B2
Filing date	Jul 26, 2022
Priority date	Jan 27, 2020
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

Provided is a method of manufacturing a vibration transmission member for an ultrasonic treatment tool. The method includes: applying a release agent between a surface of a vibration transmission member configured to transmit ultrasonic vibration and a die for hot forging; performing hot forging to form the vibration transmission member after the applying of the release agent; removing, after the performing of the hot forging, a part of an oxide film formed in the performing of the hot forging by a first surface treatment; performing pickling to remove the oxide film after the removing of the part of the oxide film by a blasting treatment; and performing coating with a resin after the performing of the pickling.

First claim

What is claimed is:

1 . A method of manufacturing a vibration transmission member for an ultrasonic treatment tool, the method comprising, in order:
applying a release agent between a surface of a base material and a die for hot forging; performing hot forging on the base material applied with the release agent to form the vibration transmission member, the vibration transmission member being configured to transmit ultrasonic vibration; performing a first surface treatment, thereby removing a part of an oxide film formed on a surface of the vibration transmission member in the performing of the hot forging; performing pickling to remove at least a part of a remainder of the oxide film that was not removed in the first surface treatment; coating at least part of the surface of the vibration transmission member with a resin; and performing a second surface treatment after the performing of the pickling and before the coating, wherein:
the first surface treatment is a blasting treatment using a first projection material,
the second surface treatment is a blasting treatment using a second projection material, and
a diameter of the second projection material is larger than a diameter of the first projection material.

2 . The manufacturing method according to claim 1 , wherein the projection material comprises alumina as a main component.

3 . The manufacturing method according to claim 1 , wherein fluoronitric acid is used for the pickling.

4 . The manufacturing method according to claim 1 , wherein the vibration transmission member is made of Ti-6Al-4V.

5 . The manufacturing method according to claim 1 , wherein the resin comprises at least an ether group and a ketone group.

6 . The manufacturing method according to claim 5 , wherein the resin is poly ether ether ketone (PEEK).

7 . A method of manufacturing an ultrasonic treatment tool, the method comprising, in order:
applying a release agent between a surface of a base material and a die for hot forging; performing hot forging on the base material applied with the release agent to form a vibration transmission member, the vibration transmission member being configured to transmit ultrasonic vibration; performing a first surface treatment, thereby removing a part of an oxide film formed on a surface of the vibration transmission member in the performing of the hot forging; performing pickling to remove at least a part of a remainder of the oxide film that was not removed in the first surface treatment; coating at least part of the surface of the vibration transmission member with a resin; assembling the vibration transmission member to a housing main body; and performing a second surface treatment after the performing of the pickling and before the coating, wherein:
the first surface treatment is a blasting treatment using a first projection material,
the second surface treatment is a blasting treatment using a second projection material, and
a diameter of the second projection material is larger than a diameter of the first projection material.

Assignees

• Olympus Corp

Inventors

• Akagane Tsunetaka

Classifications

• B24C11/00

  Selection of abrasive materials {or additives} for abrasive blasts (polishing compositions C09G) · CPC title

• B24C1/086 Primary

  Descaling; Removing coating films · CPC title

• B21K5/00 Primary

  Making tools or tool parts, e.g. pliers · CPC title

• A61B17/32

  Surgical cutting instruments ({A61B18/042 takes precedence; suture cutters A61B17/0467;} implements for ligaturing and cutting {A61B17/122, A61B17/12; instruments for rupturing the amniotic membrane A61B17/4208; specially adapted knives for eye surgery A61F9/0133}) · CPC title