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For the Inventor, By the Inventor

Osaka, Japan

Atsushi Hayami

This inventor holds 6 USPTO granted patents and 2 published patent applications. Top assignee: Tsubakimoto Chain Company. Active years: 2008-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Atsushi Hayami. Retrieved from https://idiyas.com/inventor/atsushi-hayami-r8thn1ox

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

Calculating rank
USPTO Granted Patents = 6 

% Patents Active = 83.3

Average Co-Inventor Count = 2.3

ph-index = 3

Forward Citations = 38(Granted Patents)


Company Filing History:

goldMedal6 out of 914 
 
Tsubakimoto Chain Company
 patents

Years Active: 2008-2013

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6 patents (USPTO):Explore Patents
1. 8568258 - Chain tensioner (2013-10-29),
2. 8419575 - Ball-type tensioner (2013-04-16),
3. 8282520 - Chain tensioner (2012-10-09),
4. 8092327 - Tensioner lever for chain drive (2012-01-10),
5. 7967708 - Chain guide for use in engine (2011-06-28),
6. 7468012 - Ratchet type tensioner (2008-12-23),

Title: Innovations by Atsushi Hayami

Introduction

Atsushi Hayami is a notable inventor based in Osaka, Japan. He has made significant contributions to the field of mechanical engineering, particularly in the development of tensioning devices. With a total of 6 patents to his name, Hayami's work has had a considerable impact on power transmission technologies.

Latest Patents

Hayami's latest patents include innovative designs for chain tensioners. One of his notable inventions is a chain tensioner that features a ratchet mechanism. This mechanism consists of annular teeth on a plunger and an expansible resilient ring. The design allows for a steep slope on the rear surfaces of the annular teeth, while the front surfaces have a gradual slope with a convex curvature. This unique design ensures that the rate of change of the slope decreases as the plunger retracts. Another significant patent is a ball-type tensioner, which comprises a spring-biased plunger with annular rack teeth. The teeth are engaged by radially movable balls that are received in inclined grooves. This design effectively blocks retraction of the plunger during engine start-up while allowing retraction under excessive force conditions.

Career Highlights

Atsushi Hayami is currently employed at Tsubakimoto Chain Company, where he continues to innovate and develop new technologies. His work has been instrumental in enhancing the efficiency and reliability of chain tensioning systems.

Collaborations

Hayami has collaborated with several talented individuals in his field, including Yuji Kurematsu and Osamu Yoshida. These collaborations have fostered a creative environment that encourages the development of cutting-edge technologies.

Conclusion

Atsushi Hayami's contributions to the field of mechanical engineering, particularly in chain tensioning devices, highlight his innovative spirit and dedication to advancing technology. His patents reflect a deep understanding of mechanical principles and a commitment to improving power transmission systems.

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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