Nabari, Japan

Naosumi Tada

This inventor holds 20 USPTO granted patents and 2 EPO patents, primarily in Hydraulic Tensioners. Top assignees: Borg-Warner Automotive, K.k., Borgwarner Inc., Borgwarner Morse Tec Japan K.k.. Active years: 1997-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Naosumi Tada. Retrieved from https://idiyas.com/inventor/naosumi-tada

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


% Patents Active = 90.0

 

Average Co-Inventor Count = 1.3

ph-index = 10

Forward Citations = 293(Granted Patents)


Location History:

  • Nabari, JP (1997 - 2004)
  • Mie, JP (2002 - 2004)

Company Filing History:


Years Active: 1997-2004

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Areas of Expertise:
Steel Composition
Blade Tensioner
Hydraulic Tensioner
Carbide Coated Steel
Chain Tensioner
Pressure Relief Valve
Oil Reservoir
Directional Vent Device
Piston Mechanism
Tensioner Arm
Oil Drainage
Hard Steel Articles
20 patents (USPTO):Explore Patents

Title: Naosumi Tada: A Pioneer in Steel Composition and Mechanical Innovations

Introduction

Naosumi Tada, an esteemed inventor from Nabari, Japan, has made significant contributions to the field of engineering and materials science. With a remarkable portfolio of 20 patents, he has demonstrated a dedication to innovation that has advanced various industrial applications, particularly in the automotive sector.

Latest Patents

Among his notable inventions are two latest patents that showcase his ingenuity. The first is a patent focusing on a **steel composition** that enhances chain parts and steel articles with hard, wear-resistant carbide coatings. This innovative method involves tumbling the steel components in a heated retort with a specialized particulate mix containing a source of vanadium and/or niobium. The unique steel substrate comprises at least 0.2% carbon, ideally ranging from 0.7% to 1.2%, and features 4-12% chromium content. Notably, the chemical deposition process allows for the infusion of chromium from the steel substrate into the carbide coating, ensuring a homogeneous distribution and improved adhesion strength, which is crucial for durability.

The second patent revolves around a **blade tensioner**, which is engineered with a blade shoe that has a chain sliding face. This tensioner incorporates several plate-spring-like blade springs positioned on the reverse side of the sliding face to apply a consistent spring force. It also features spacer members that maintain a fixed distance between adjoining blade springs, optimizing the damping factor of the system and resulting in stabilized performance.

Career Highlights

Naosumi Tada has an impressive professional background, having worked with prominent companies in the automotive industry, including BorgWarner Automotive and BorgWarner Inc. His expertise and innovative thinking have made him a valued asset in these organizations, allowing him to develop cutting-edge technologies that address industry needs.

Collaborations

During his career, Tada has collaborated with notable coworkers such as Yumin Wang and Yoshito Hanayama. Their joint efforts have likely contributed to the development of innovative solutions and the successful execution of his patent applications.

Conclusion

Naosumi Tada is a distinguished inventor whose work in steel composition and mechanical design illustrates his commitment to excellence in engineering. With a robust collection of patents and valuable collaborations, he continues to influence the field and inspire future innovations. His contributions not only enhance product durability but also set new standards in the automotive and manufacturing industries.

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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