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For the Inventor, By the Inventor

Osaka, Japan

Katsuya Nakakubo

This inventor holds 15 USPTO granted patents and 2 published patent applications. Top assignee: Tsubakimoto Chain Company. Active years: 1991-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Katsuya Nakakubo. Retrieved from https://idiyas.com/inventor/katsuya-nakakubo

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

USPTO Granted Patents = 15 

% Patents Active = 100.0

Average Co-Inventor Count = 2.4

ph-index = 8

Forward Citations = 165(Granted Patents)


Location History:

  • Tokorozawa, JP (1991 - 1993)
  • Saitama, JP (1993)
  • Iruma, JP (1996 - 1997)
  • Saitama-ken, JP (1998 - 2000)
  • Osaka, JP (2002 - 2019)

Company Filing History:

goldMedal15 out of 914 
 
Tsubakimoto Chain Company
 patents

Years Active: 1991-2019

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15 patents (USPTO):Explore Patents
1. 10364869 - Chain guide (2019-07-30),
2. 6666785 - Tensioner (2003-12-23),
3. 6592479 - Tensioner with relief valve mechanism (2003-07-15),
4. 6471612 - Closed hydraulic tensioner (2002-10-29),
5. 6435992 - Tensioner with plunger stopper pin (2002-08-20),
6. 6146300 - Tensioner device for chain drive mechanism (2000-11-14),
7. 5833220 - Hydraulic tensioner (1998-11-10),
8. 5785619 - Hydraulic tensioner (1998-07-28),
9. 5709625 - Hydraulic tensioner (1998-01-20),
10. 5630768 - Tensioner with spring having nonlinear characteristics (1997-05-20),
11. 5538478 - Preventive structure for preventing extraordinary deformation of a (1996-07-23),
12. 5234383 - Temperature compensated tensioner (1993-08-10),
13. 5181889 - Tensioner for a toothed belt (1993-01-26),
14. 5167402 - Hydraulic pressure apparatus with air scavenging (1992-12-01),
15. 5073149 - Diaphragm seal type tensioner (1991-12-17),

Title: Katsuya Nakakubo: Innovator in Chain Technology

Introduction

Katsuya Nakakubo is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of chain technology, holding a total of 15 patents. His innovative designs focus on enhancing the efficiency and functionality of mechanical systems.

Latest Patents

Among his latest patents, Nakakubo has developed a chain guide that optimizes space in engine rooms while ensuring strength, rigidity, and durability. This design simplifies manufacturing processes and minimizes material waste. Additionally, it prevents increases in vibration and noise during operation, thereby easing maintenance burdens. Another notable invention is a tensioner that features a unique assembly mechanism. This tensioner includes a left-hand coil spring and a plug that is screwed into the tensioner body in the opposite direction of the spring's winding. This innovative design allows for smooth assembly without producing abrasive powders that could hinder the plunger's movement.

Career Highlights

Katsuya Nakakubo is currently employed at Tsubakimoto Chain Company, where he continues to push the boundaries of chain technology. His work has been instrumental in developing solutions that enhance the performance and reliability of mechanical systems.

Collaborations

Throughout his career, Nakakubo has collaborated with notable colleagues, including Nobuto Kozakura and Masao Maruyama. These partnerships have fostered a creative environment that encourages innovation and the sharing of ideas.

Conclusion

Katsuya Nakakubo's contributions to chain technology exemplify his commitment to innovation and excellence. His patents reflect a deep understanding of mechanical systems and a dedication to improving their functionality. His work continues to influence the industry and inspire future inventors.

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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