Location History:
- Samamihara, JP (2016)
- Sagamihara, JP (2013 - 2024)
- Ibaraki, JP (2019 - 2024)
Company Filing History:
Years Active: 2013-2024
Title: The Innovative Contributions of Fumiyuki Yamaoka
Introduction
Fumiyuki Yamaoka is a prominent inventor based in Sagamihara, Japan. He has made significant contributions to the field of engineering, particularly in the development of advanced shock absorber technologies. With a total of 15 patents to his name, Yamaoka's work has had a considerable impact on automotive systems.
Latest Patents
One of Yamaoka's latest patents involves a sophisticated shock absorber design. This design includes a cylinder, a piston that is slidably inserted into the cylinder, and a piston rod that extends outside the cylinder. The shock absorber features a main valve that generates a damping force, a pilot chamber that applies pressure to the main valve, and an introduction passage that introduces fluid into the pilot chamber. Additionally, the design incorporates a pilot passage that connects the pilot chamber to the downstream side of the main valve, along with a control valve in the pilot passage. The innovative design also includes a first orifice, a first passage in parallel with the first orifice, and a first check valve that opens at a predetermined differential pressure. Another notable aspect of his shock absorber design is the introduction of hydraulic fluid from the cylinder's lower chamber into a back pressure chamber during the compression stroke of the piston rod. This advancement eliminates the need for multiple discs and a check valve, thereby reducing the axial length of the piston rod and the overall length of the shock absorber.
Career Highlights
Yamaoka has worked with notable companies such as Hitachi Automotive Systems and Hitachi Astemo. His experience in these organizations has allowed him to refine his skills and contribute to cutting-edge technologies in the automotive sector.
Collaborations
Throughout his career, Yamaoka has collaborated with talented individuals, including Mikio Yamashita and Masaru Kouyama. These collaborations have fostered innovation and have led to the development of advanced engineering solutions.
Conclusion
Fumiyuki Yamaoka's contributions to the field of shock absorber technology exemplify his innovative spirit and dedication to engineering excellence. His patents reflect a commitment to improving automotive performance and safety.