Location History:
- Himeji, JP (1982)
- Kobe, JP (1984 - 2001)
Company Filing History:
3 out of 1,100 
1 out of 2,464 
1 out of 1,886 
Years Active: 1982-2001
Title: Innovations of Toyofumi Hasegawa
Introduction
Toyofumi Hasegawa is a notable inventor based in Kobe, Japan. He has made significant contributions to the field of materials engineering, particularly in the development of steel products. With a total of five patents to his name, Hasegawa's work has had a considerable impact on various industries.
Latest Patents
Hasegawa's latest patents include a steel wire rod or bar with good cold deformability. This invention provides a steel wire rod or bar that exhibits excellent cold deformability without undergoing spheroidizing annealing after hot rolling. The unique ferrite structure of this steel wire rod contains no less than 25 nitride and carbide particles per 25 µm on average in a sectional area three-fourths of the diameter within the circumference of the rod or bar. These precipitates significantly reduce flow stress during cold deformation.
Another notable patent is for an outer ring designed for high strength constant velocity joints. This outer ring boasts excellent torsional strength and fatigue resistance, enhancing processability. The outer ring is made from a specific steel composition and features an involute serration part and a screw part. The design ensures that the surface hardness at the end is 720 or more in Hv, with a specific ratio of effective hardened layer depth to shaft radius.
Career Highlights
Throughout his career, Toyofumi Hasegawa has worked with prominent companies such as Kabushiki Kaisha Kobe Seiko Sho and NTN Corporation. His experience in these organizations has allowed him to refine his skills and contribute to innovative projects in the field of materials science.
Collaborations
Hasegawa has collaborated with notable coworkers, including Takeshi Nakahara and Sadayoshi Furusawa. Their combined expertise has fostered advancements in their respective fields.
Conclusion
Toyofumi Hasegawa's contributions to materials engineering through his innovative patents have significantly influenced the industry. His work continues to inspire future developments in steel products and engineering solutions.