Masao Kashiwagi

Title: Masao Kashiwagi: Hydraulic and Tournament Oil-Path Inventions.

Introduction

Masao Kashiwagi is an inventor associated with Sagamihara, Japan. His patent work includes inventions for hydraulic pressure control and oil-path arrangements, and he holds 2 patents.

Latest Patents

Kashiwagi’s patents address the design and control of hydraulic systems.

- **Tournament oil path constituting apparatus.** This invention describes a laminated block made from multiple oil-path plates. Shuttle valve holes and connecting grooves are formed at the plates’ overlapping faces, while shuttle valves select high-pressure oil from introductory paths and direct it to the connecting grooves. The apparatus also includes main paths that pass through the laminated plates and branch grooves connected to those paths.

- **Hydraulic pressure control device.** This invention is designed to reduce actuator shock and rapid increases in pump delivery pressure when a directional control valve switches. Depending on the valve’s position, the device connects or isolates ports from the tank and actuator, and introduces a selected maximum pilot pressure into a pilot line.

Career Highlights

Kashiwagi’s listed company affiliations include Kayaba Industry Co., Ltd. and Hitachi Construction Machinery Co., Ltd. His patents reflect work on hydraulic components and control systems relevant to machinery.

Collaborations

His listed coworkers include Ikuo Inagaki and Genroku Sugiyama.

Conclusion

Masao Kashiwagi’s patent portfolio focuses on hydraulic engineering, with inventions addressing oil-path configuration and pressure control in machinery.