Yosimitu Tokunaga

Title: Yosimitu Tokunaga: Metal Powder Production Innovations.

Introduction.

Yosimitu Tokunaga is an inventor associated with Osaka, Japan, and Kubota Corporation. His patent work includes methods and equipment for producing metal powder through rapid cooling and solidification. Tokunaga is credited with 3 patents.

Latest Patents.

Tokunaga’s latest listed patents focus on producing metal powder by cooling molten metal in a flowing layer of liquid.

“Method of and Apparatus for Producing Metal Powder” describes a process in which cooling liquid swirls along the inner surface of a tubular body, forming a moving liquid layer. Molten metal is supplied inside this layer and divided by a directed gas jet, allowing the resulting droplets to cool and solidify rapidly. The apparatus then discharges the cooling liquid and solidified metal powder from the tube. The method is designed to reduce variations in cooling rates and produce fine particles.

“Method of Producing Metal Powder” also uses a revolving cooling-liquid layer inside a tubular body. Molten metal enters the layer from the inner side, where it is divided, rapidly cooled, and solidified into powder. The process supports continuous powder production, followed by continuous liquid removal and drying.

Career Highlights.

Tokunaga’s listed inventions address practical challenges in metal powder manufacturing, including consistent cooling, rapid solidification, fine particle production, and continuous processing. His work is associated with Kubota Corporation.

Collaborations.

Hiroshi Izaki and Syoichi Yoshino are identified as Tokunaga’s coworkers.

Conclusion.

Yosimitu Tokunaga’s patent work centers on tubular cooling systems that turn molten metal into powder through controlled, rapid solidification and continuous processing.