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For the Inventor, By the Inventor

Sakai, Japan

Tatsutoshi Umeda

This inventor holds 6 USPTO granted patents. Top assignee: Kubota Corporation. Active years: 1984-1987.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tatsutoshi Umeda. Retrieved from https://idiyas.com/inventor/tatsutoshi-umeda

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

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 2.9

ph-index = 5

Forward Citations = 47(Granted Patents)


Location History:

  • Kawachinagano, JP (1984)
  • Sakaishi, JP (1986 - 1987)
  • Osaka, JP (1986 - 1987)
  • Sakai, JP (1987)

Company Filing History:

goldMedal6 out of 2,907 
 
Kubota Corporation
 patents

Years Active: 1984-1987

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6 patents (USPTO):Explore Patents
1. 4686946 - Valve moving system of an overhead valve engine (1987-08-18),
2. 4664228 - Lubrication system for a vertical shaft engine (1987-05-12),
3. 4633824 - Cooling means for the squish part of an air cooling overhead valve engine (1987-01-06),
4. 4628878 - Splash lubricating system for an engine (1986-12-16),
5. 4610227 - Automatic decompression system for starting engine (1986-09-09),
6. 4426964 - Runner-type lubricating device for vertical engine (1984-01-24),

Title: Innovations by Tatsutoshi Umeda

Introduction

Tatsutoshi Umeda is a notable inventor based in Sakaishi, Japan. He has made significant contributions to the field of engine technology, holding a total of 6 patents. His work primarily focuses on improving the efficiency and functionality of engine systems.

Latest Patents

One of Umeda's latest patents is a valve moving system for an overhead valve engine. This invention minimizes the overall height of the cylinder head and head cover by inclining valve stems and footing bolts of rocker arm supports. It also involves disposing of part of the upper wall of the cylinder head lower than the bosses supporting the valve stems. This design allows the engine to be compatible with machines that typically use side valve engines. Another significant patent is a lubrication system for a vertical shaft engine. This system includes a crank case with upper and lower walls, a vertical crank shaft, and a vertical balancing shaft. It features an oil pump driven by the balancing shaft and an oil feeding passage that supplies lubricating oil to various parts of the engine.

Career Highlights

Umeda is currently employed at Kubota Corporation, where he continues to innovate and develop new technologies. His work has been instrumental in advancing engine design and functionality.

Collaborations

Umeda has collaborated with notable coworkers such as Keiichi Nakano and Yoshio Tani, contributing to various projects and innovations within the company.

Conclusion

Tatsutoshi Umeda's contributions to engine technology through his patents reflect his dedication to innovation and improvement in the field. His work continues to influence the design and efficiency of engine systems.

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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