Kosei Yamaguchi is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of valve technology, holding a total of six patents. His innovative designs have enhanced the functionality and efficiency of various valve systems.

Latest Patents

Yamaguchi's latest patents include a check valve and a valve device. The check valve features a valve case, a positive pressure valve, a spring, and a negative pressure valve. The positive pressure valve is designed to slide within a valve chamber, while the spring urges it to abut against a positive pressure valve seat. The negative pressure valve operates to close a communicating passage in the positive pressure valve under normal conditions, opening it when the fuel tank pressure drops to a predetermined level. The valve device, on the other hand, consists of a valve case and a valve element that is also slidably disposed within a valve chamber. This valve element is urged toward a valve seat by a positive pressure spring, and it includes multiple opening portions that interact with ribs in the valve chamber to limit the movement of the spring.

Career Highlights

Kosei Yamaguchi is currently employed at Piolax, Inc., where he continues to develop innovative valve solutions. His work has been instrumental in advancing the technology used in various applications, particularly in the automotive and industrial sectors.

Conclusion

Kosei Yamaguchi's contributions to valve technology through his patents demonstrate his expertise and commitment to innovation. His work at Piolax, Inc. continues to influence the industry, showcasing the importance of inventive minds in driving technological progress.

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