Hitachi, Japan

Shunzo Tomioka

This inventor holds 5 USPTO granted patents. Top assignee: Hitachi, Ltd.. Active years: 1976-1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shunzo Tomioka. Retrieved from https://idiyas.com/inventor/shunzo-tomioka

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 = 3.7

ph-index = 5

Forward Citations = 63(Granted Patents)


Location History:

  • Hitachi, JA (1976)
  • Hitachi, JP (1980 - 1985)

Company Filing History:


Years Active: 1976-1985

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5 patents (USPTO):Explore Patents

Title: Shunzo Tomioka: Innovator in Hydraulic Machine Technology

Introduction

Shunzo Tomioka is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of hydraulic machinery, holding a total of 5 patents. His innovative designs focus on improving the efficiency and functionality of hydraulic systems.

Latest Patents

One of his latest patents is a hydraulic machine shaft seal with centrifugal removal of sand and soil. This invention features a rotary shaft with a collar that projects radially outward. The design includes a casing that carries a seal ring pressed against the collar to create a fluid-tight seal. The collar's axial end surface has radial grooves that help separate sand and soil particles from water as the shaft rotates at high speed.

Another significant patent is a bearing system for a vertical type rotary machine. This system includes a vertically extending rotor shaft with a guide bearing immersed in oil within an oil tank. The guide bearing has a cylindrical surface that aligns with the rotor shaft and features axially extending oil grooves. An oil guide member is positioned at the lower end of the guide bearing to direct oil flow into the grooves, enhancing the efficiency of the rotary machine.

Career Highlights

Shunzo Tomioka has dedicated his career to advancing hydraulic technology. His work at Hitachi, Ltd. has positioned him as a key figure in the development of innovative hydraulic solutions. His patents reflect a deep understanding of mechanical engineering and fluid dynamics.

Collaborations

Throughout his career, Shunzo has collaborated with talented individuals such as Kinpei Okano and Masanori Matsuo. These partnerships have contributed to the successful development of his patented technologies.

Conclusion

Shunzo Tomioka's contributions to hydraulic machinery through his innovative patents demonstrate his expertise and commitment to engineering excellence. His work continues to influence the industry and inspire future innovations.

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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