Location History:
- Sakai, JP (1988 - 1990)
- Osaka, JP (1984 - 2001)
- Kawachinagano, JP (1998 - 2010)
Company Filing History:
13 out of 152 
2 out of 25,550 
Years Active: 1984-2010
Title: **Ryotatsu Otsuka: A Trailblazer in Metal Purification and Aluminum Brazing**
Introduction
Ryotatsu Otsuka, an accomplished inventor based in Osaka, Japan, is known for his significant contributions to the fields of metallurgy and materials science. With a remarkable portfolio of 14 patents, Otsuka has made strides in developing innovative methods for purifying metals and creating efficient brazing alloys. His work not only exemplifies the spirit of innovation but also addresses practical challenges in industrial applications.
Latest Patents
Among his latest patents is a revolutionary method of purifying metals. This disclosure introduces a technique that efficiently and cost-effectively eliminates impurity elements from various metallic or semiconductor materials, specifically targeting metallurgical grade silicon. Another notable patent describes two aluminum brazing alloys designed for cold brazing applications. The first alloy comprises 70 to 90% by weight of zinc and 0.05 to 5% by weight of titanium, with aluminum and impurities making up the balance. The second alloy consists of 30 to 70% by weight of zinc, 1 to 7% by weight of silicon, and 0.05 to 5% by weight of titanium. These alloys are characterized by their low melting points, allowing for effective brazing of low-melting aluminum materials at temperatures ranging from 400 to 550°C.
Career Highlights
Throughout his career, Ryotatsu Otsuka has worked with prominent companies, including Showa Aluminum Corporation and Sharp Corporation. His tenure at these organizations has enabled him to develop and refine his innovative ideas in the field of metal processing and brazing technology. His patents reflect his relentless pursuit of innovation and his commitment to enhancing industrial processes.
Collaborations
Otsuka's collaborations with esteemed colleagues such as Kazuo Toyoda and Shigemi Tanimoto have further enriched his work. These partnerships demonstrate the importance of teamwork and knowledge-sharing in driving advancements in technology and innovation.
Conclusion
Ryotatsu Otsuka stands out as a key figure in the fields of metallurgy and materials science. Through his inventive methods and the development of new brazing alloys, he has contributed significantly to the industry. His ongoing work continues to inspire and influence the next generation of inventors and engineers.