Nara, Japan

Tadasu Yamakawa

This inventor holds 2 USPTO granted patents. Top assignee: Koyo Seiko Company, Ltd.. Active years: 2000-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadasu Yamakawa. Retrieved from https://idiyas.com/inventor/tadasu-yamakawa

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

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 2.0

ph-index = 2

Forward Citations = 16(Granted Patents)


Company Filing History:


Years Active: 2000-2001

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2 patents (USPTO):Explore Patents

Title: Tadasu Yamakawa: Innovator in Auto Tensioner Technology

Introduction

Tadasu Yamakawa is a notable inventor based in Nara, Japan. He has made significant contributions to the field of mechanical engineering, particularly in the development of auto tensioner technology. With a total of 2 patents to his name, Yamakawa's innovations have the potential to enhance the efficiency and reliability of various mechanical systems.

Latest Patents

Yamakawa's latest patents include two innovative designs for auto tensioners. The first patent describes an auto tensioner that features a fixing shaft with an arm supporting portion. This design allows for a swingable arm that maintains constant belt tension. It includes a tension pulley, a friction pressing plate, and a friction plate that work together to manage wear and friction. The design incorporates concave portions in the friction pressing plate to collect wearing particles, preventing them from interfering with the mechanism.

The second patent also focuses on an auto tensioner, which consists of a support shaft with an arm support portion. This design features a rotatable arm with a pulley support portion that is offset from the support shaft. A friction plate is strategically placed to apply rotary resistance to the arm, ensuring that the tension pulley operates effectively. This design enhances the load-bearing capacity of the friction plate, making it more resilient under operational stresses.

Career Highlights

Tadasu Yamakawa is currently employed at Koyo Seiko Company, Ltd., where he continues to innovate and develop new technologies. His work has been instrumental in advancing the capabilities of auto tensioners, which are critical components in various mechanical applications.

Collaborations

Yamakawa has collaborated with several talented individuals in his field, including Takashi Tsutsui and Hideyuki Ohta. These collaborations have fostered a creative environment that encourages the exchange of ideas and the development of cutting-edge technologies.

Conclusion

Tadasu Yamakawa is a distinguished inventor whose work in auto tensioner technology has made a significant impact in the field of mechanical engineering. His innovative designs and collaborative efforts continue to push the boundaries of what is possible in this area.

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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