Kimio Uchida

Title: Kimio Uchida: Inventor of Rare-Earth Magnet Technologies

Introduction

Kimio Uchida is an inventor based in Saitama, Japan, whose patent work focuses on producing sintered rare-earth magnets. His portfolio includes 12 patents, and he is associated with Hitachi Metals, Ltd.

Latest Patents

Uchida’s listed patents address magnet composition, processing, and manufacturing methods.

“Arc Segment Magnet, Ring Magnet and Method for Producing Such Magnets” describes thin arc-segment and ring magnets made from rare-earth sintered material. The patent outlines composition and performance characteristics, including limits on oxygen content and requirements for density, coercivity, and magnetic orientation. It also describes preparing a slurry by mixing fine alloy powder with an oil-based liquid and a small amount of surfactant.

“Method for Producing Sintered Rare Earth Magnet and Sintered Ring Magnet” presents a manufacturing process for sintered magnets. It involves finely pulverizing rare-earth alloy powder in a non-oxidizing atmosphere, dispersing the powder in a non-oxidizing liquid with lubricants, molding the slurry, and then degreasing, sintering, and heat-treating the resulting body.

Career Highlights

Uchida’s patent work reflects an emphasis on improving the production of rare-earth magnets, including ring and arc-segment forms. The described methods address powder handling, slurry preparation, molding, and subsequent heat treatment.

Collaborations

Uchida’s listed coworkers include Masahiro Takahashi and Hisato Tokoro. His work is associated with Hitachi Metals, Ltd.

Conclusion

Kimio Uchida’s patents document practical approaches to producing sintered rare-earth magnets, with particular attention to magnet performance and manufacturing processes.