| TOKYU CAR CORPORATION Patent applications |
| Patent application number | Title | Published |
|---|
| 20110274943 | METAL MATERIAL PROCESSING METHOD, STRUCTURE PROCESSED USING METAL MATERIAL PROCESSING METHOD AND ROTARY TOOL - In a metal material processing method, two metal materials are arranged to face each other in a processing portion, and a distal end of a rod-shaped rotary tool is inserted into the processing portion while rotating the rotary tool, thereby the two metal materials are processed. The distal end of the rotary tool has a probe protruding in a central portion and a shoulder in a peripheral portion. The probe and the shoulder are constituted by different materials in at least surface portions that are in contact with the metal materials. | 11-10-2011 |
| 20090166395 | METHOD OF JOINING METAL MATERIAL - Metal materials made of iron (Fe) or the like are butted together at a joint, and a probe of a rotary tool is inserted into the joint. The rotary tool is rotated while being moved in the lengthwise direction of the joint, whereby the metallographic structure of the joint is stirred, and the metal materials are joined. While the rotary tool is being rotated and moved, liquid CO | 07-02-2009 |
