Location History:
- Tokohama, JP (1990)
- Fujisawa, JP (1992 - 1993)
- Kanagawa, JP (1993)
- Yokohama, JP (1989 - 1995)
- Kanagawa-ken, JP (1999 - 2001)
Company Filing History:
21 out of 13,408 
3 out of 548 
1 out of 42,496 
Years Active: 1989-2001
Title: Kazuhiro Doi: Innovator in Brake Technology
Introduction
Kazuhiro Doi, an accomplished inventor based in Yokohama, Japan, has made significant contributions to the automotive industry. With an impressive portfolio of 24 patents, Doi has been at the forefront of innovations in brake technology, demonstrating a commitment to enhancing vehicle safety and performance.
Latest Patents
Among Doi's latest inventions are advancements in brake disc rotors and disk brakes. The innovative brake disc rotor features a design comprising a first disc plate and a second disc plate with a series of fins arranged radially. These fins are strategically placed to enhance ventilation through a series of dedicated holes, improving the overall efficiency of the brake system. Notably, the design includes alternating long and short fins with specific characteristics, making it a groundbreaking solution for heat management in brake systems.
Additionally, Doi has developed an advanced disk brake design. This design includes uniquely configured mounting portions of the caliper that optimize the caliper's alignment with respect to the disk's rotation direction. The entrance-side mounting portion is longer and thicker than the exit-side counterpart, contributing to higher flexural rigidity during braking. This innovative approach helps maintain better performance and stability during vehicle operation.
Career Highlights
Doi's career highlights include positions at well-known companies such as Nissan Motor Company Limited and Tokico, Ltd. His experience in these prestigious organizations has provided him with the technical expertise and insight necessary to create impactful solutions in the automotive field.
Collaborations
Throughout his career, Doi has collaborated with notable colleagues, including Tsutomu Hamabe and Tadashi Tamasho. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas, furthering advancements in automotive technology.
Conclusion
Kazuhiro Doi's dedication to improving brake technology through his numerous patents exemplifies his role as a leader in the field. His innovative designs not only enhance vehicle performance but also contribute to greater safety for drivers and passengers alike. As he continues to push the boundaries of automotive engineering, Doi will undoubtedly remain a key figure in the evolution of brake systems.