Hiroshima, Japan

Kazuma Shimizu

This inventor holds 3 USPTO granted patents. Top assignee: Toyo Kogyo Co., Ltd.. Active years: 1980-1982.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuma Shimizu. Retrieved from https://idiyas.com/inventor/kazuma-shimizu-wp36fd8b

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 = 2.8

ph-index = 2

Forward Citations = 18(Granted Patents)


Company Filing History:


Years Active: 1980-1982

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3 patents (USPTO):Explore Patents

Title: Kazuma Shimizu: Innovator in Rotary Piston Engine Technology

Introduction

Kazuma Shimizu is a notable inventor based in Hiroshima, Japan. He has made significant contributions to the field of rotary piston engines, holding a total of 3 patents. His innovative designs focus on enhancing the performance and efficiency of these engines.

Latest Patents

Shimizu's latest patents include an apex seal for rotary piston engines with separate sealing and support. This invention features an elongated sealing piece and an elongated support piece that are superposed throughout their lengths. A side piece is included at one end of the superposed pieces, which has an inclined inward surface that engages with a correspondingly inclined end surface of the sealing piece while remaining spaced from the support piece. Additionally, a spring is incorporated to urge the support and side pieces toward the inner wall of the rotor housing. Another significant patent is the gas seal means for rotary piston engines. This design involves a rotor that is coated with a fluoride resin at each side surface near the side seals, effectively filling the clearance between the rotor side surface and the adjacent inner surface of the side housing, thereby improving gas-tightness.

Career Highlights

Kazuma Shimizu is currently associated with Toyo Kogyo Co., Ltd., where he continues to innovate in the field of rotary piston engines. His work has been instrumental in advancing the technology used in these engines, making them more efficient and reliable.

Collaborations

Shimizu has collaborated with notable coworkers such as Haruhiko Satow and Masato Yoshimura. Their combined expertise has contributed to the development of cutting-edge technologies in the automotive industry.

Conclusion

Kazuma Shimizu's contributions to rotary piston engine technology are noteworthy and reflect his dedication to innovation. His patents demonstrate a commitment to improving engine performance and efficiency, solidifying his reputation as a leading inventor in this field.

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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