Niihari-gun, Japan

Masaki Egashira

This inventor holds 5 USPTO granted patents and 1 EPO patent. Top assignee: Hitachi Construction Machinery Co., Ltd.. Active years: 1990-2007.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaki Egashira. Retrieved from https://idiyas.com/inventor/masaki-egashira

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 = 5.3

ph-index = 3

Forward Citations = 65(Granted Patents)


Location History:

  • Ibaragi, JP (1990)
  • Niihari, JP (1991)
  • Ibaraki, JP (1993)
  • Niihari-gun, JP (2006 - 2007)

Company Filing History:


Years Active: 1990-2007

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5 patents (USPTO):Explore Patents

Title: Masaki Egashira: Innovator in Hydraulic Machinery

Introduction

Masaki Egashira is a notable inventor based in Niihari-gun, Japan. He has made significant contributions to the field of hydraulic machinery, holding a total of 5 patents. His work focuses on improving the efficiency and stability of hydraulic systems used in construction machinery.

Latest Patents

One of Masaki Egashira's latest patents involves a hydraulic circuit designed for construction machinery. This innovation aims to keep one of three hydraulic pumps unaffected by variations in torque from the remaining pumps. The displacements of the first and second hydraulic pumps are controlled based on their own delivery pressures, along with a pressure obtained from the third hydraulic pump. This ensures that the pressure oil delivered from the third hydraulic pump remains stable, regardless of the variations in delivery flow rates from the first and second pumps. This design guarantees a consistent flow rate, enhancing the overall performance of hydraulic systems.

Career Highlights

Masaki Egashira is currently employed at Hitachi Construction Machinery Co., Ltd., where he continues to develop innovative solutions for hydraulic machinery. His expertise in hydraulic systems has made him a valuable asset to the company and the industry as a whole.

Collaborations

Throughout his career, Masaki has collaborated with esteemed colleagues such as Osamu Tomikawa and Nobuei Ariga. These partnerships have fostered a creative environment that encourages the development of cutting-edge technologies in hydraulic machinery.

Conclusion

Masaki Egashira's contributions to hydraulic machinery demonstrate his commitment to innovation and efficiency. His patents reflect a deep understanding of hydraulic systems, making him a key figure in the field. His work continues to influence the construction machinery industry positively.

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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