Toyota, Japan

Kazuharu Yamada

This inventor holds 3 USPTO granted patents. Top assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha. Active years: 1984-1986.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuharu Yamada. Retrieved from https://idiyas.com/inventor/kazuharu-yamada

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile


% Patents Active = 100.0

Average Co-Inventor Count = 5.0

ph-index = 2

Forward Citations = 21(Granted Patents)


Company Filing History:


Years Active: 1984-1986

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3 patents (USPTO):Explore Patents

Title: Kazuharu Yamada: Innovator in Hydraulic Technology

Introduction

Kazuharu Yamada is a notable inventor based in Toyota, Japan. He has made significant contributions to the field of hydraulic technology, particularly in the automotive industry. With a total of 3 patents to his name, Yamada's innovations have enhanced the performance and reliability of internal combustion engines.

Latest Patents

Yamada's latest patents include a self-contained hydraulic lifter and a self-contained hydraulic lash adjuster. The self-contained hydraulic lifter is designed for valve trains of internal combustion engines. It features a cylindrical body, a plunger that slides within it, and a diaphragm arranged in the plunger. A metal ring embedded in the diaphragm improves the sealability, ensuring better performance. The self-contained hydraulic lash adjuster, on the other hand, has a cup-shaped body and a plunger that is also designed to enhance engine efficiency. It includes a flexible diaphragm secured within a reservoir chamber, which interacts with an oil supply to maintain optimal pressure.

Career Highlights

Throughout his career, Kazuharu Yamada has worked with prominent companies such as Aisin Seiki Kabushiki Kaisha and Toyota Jidosha Kabushiki Kaisha. His experience in these organizations has allowed him to develop and refine his innovative ideas in hydraulic systems.

Collaborations

Yamada has collaborated with notable coworkers, including Hisashi Kodama and Katsujiro Sato. Their combined expertise has contributed to the successful development of various hydraulic technologies.

Conclusion

Kazuharu Yamada's contributions to hydraulic technology have made a significant impact on the automotive industry. His innovative patents reflect his dedication to improving engine performance and reliability.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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