Tsutomu Yamashita

Title: The Innovative Mind of Tsutomu Yamashita

Introduction

Tsutomu Yamashita, an accomplished inventor based in Yokohama, Japan, has made significant contributions to the field of materials science. With four patents to his name, Yamashita is known for developing advanced materials that enhance the performance of various applications, particularly in electronics and power systems.

Latest Patents

One of Tsutomu Yamashita's latest patents is centered around a novel magnetic material. This innovative substance boasts an improved maximum energy product, making it suitable for high-performance permanent magnets, bond magnets, and other critical applications. The magnetic material is represented by a general formula: R1.sub.x R2.sub.y M.sub.100-x-y, where R1 consists of at least one rare earth element, R2 includes elements with atomic radii between 0.156 to 0.174 nm, and M is either iron or cobalt. The parameters x and y are defined as x ≥ 2, y ≥ 0.01, and 4 ≤ x + y ≤ 20, with M occupying 90 atomic percent or more of the principal phase in the compound.

Another remarkable patent involves the development of a contact forming material for vacuum valves and circuit breakers. This material comprises a conductive matrix, made from copper and/or silver, combined with an arc-proof component, which may consist of chromium, titanium, zirconium, or their alloys. The manufacturing process includes compacting the arc-proof material into a green compact, sintering it to create a skeleton, infiltrating the voids with the conductive material, and then cooling the resulting composite. This innovative contact forming material is designed to deliver excellent temperature rise characteristics and reduced contact resistance.

Career Highlights

Tsutomu Yamashita is currently associated with Kabushiki Kaisha Toshiba, a leading company in the electronics and electrical equipment sector. His career at Toshiba has allowed him to engage in cutting-edge research and development, contributing significantly to the company's innovative projects.

Collaborations

Throughout his career, Yamashita has collaborated with esteemed colleagues such as Hiroshi Endo and Tsutomu Okutomi. These partnerships have enabled them to tackle complex engineering challenges, further driving advancements in material science and electrical applications.

Conclusion

Tsutomu Yamashita's inventive spirit and dedication to innovation have positioned him as a noteworthy figure in materials science. His patents not only showcase his technical expertise but also contribute to the evolution of high-performance materials that drive modern technology forward. As he continues to collaborate with industry leaders, Yamashita's work promises to pave the way for future innovations in the field.