Location History:
- Hiratsuka, JP (1988 - 1997)
- Atsugi, JP (1998)
- Kanagawa, JP (1989 - 2008)
Company Filing History:
4 out of 556 
2 out of 13,408 
2 out of 74 
Years Active: 1988-2008
Title: Toshiro Ichikawa: Innovator in Hydraulic Control Systems
Introduction
Toshiro Ichikawa is a notable inventor based in Kanagawa, Japan. He has made significant contributions to the field of engineering, particularly in hydraulic control systems and feed-screw units. With a total of eight patents to his name, Ichikawa's work reflects a commitment to innovation and technological advancement.
Latest Patents
One of Ichikawa's latest patents is a hydraulic control system for internal combustion engines. This system includes a driven mechanism powered by hydraulic pressure, which is managed through a flowing passage change-over valve. The valve body is designed with multiple ports that connect to both the supply and oil passages. A spool valve body within the valve opens and closes these ports, ensuring efficient operation. Notably, the supplying port has a maximum cross-sectional area larger than the minimum cross-sectional area of the supplying passage. Additionally, the valve is equipped to heat the hydraulic fluid, reducing its viscosity for improved performance.
Another significant patent is the feed-screw unit and electric motor utilizing the same technology. This unit features a rotor with a female screw and a reciprocating shaft that moves in accordance with the rotor's rotation. The shaft includes a male screw that engages with the female screw at one end while remaining disengaged at the other, allowing for versatile applications in various machinery.
Career Highlights
Throughout his career, Toshiro Ichikawa has worked with prominent companies such as Unisia Jecs Corporation and Nissan Motor Company Limited. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking projects in the automotive and engineering sectors.
Collaborations
Ichikawa has collaborated with esteemed colleagues, including Hideaki Nakamura and Hiroshi Kobayashi. These partnerships have fostered an environment of creativity and innovation, leading to the development of advanced technologies.
Conclusion
Toshiro Ichikawa's contributions to hydraulic control systems and feed-screw technology exemplify his dedication to innovation. His patents not only enhance the functionality of internal combustion engines but also demonstrate the potential for advancements in engineering. Ichikawa's work continues to inspire future generations of inventors and engineers.