This inventor holds 7 USPTO granted patents. Top assignees: Sanshin Kogyo Kabushiki Kaisha, Yamaha Hatsudoki Kabushiki Kaisha. Active years: 1985-1994.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Iwata, JP (1985)
- Hamamatsu, JP (1986 - 1994)
Company Filing History:
7 out of 1,061 
1 out of 4,358 
Years Active: 1985-1994
Title: Shigeo Okumura: Innovator in Marine Propulsion Technology
Introduction
Shigeo Okumura is a notable inventor based in Hamamatsu, Japan. He has made significant contributions to the field of marine propulsion technology, holding a total of 7 patents. His innovative designs focus on enhancing the efficiency and performance of marine engines.
Latest Patents
One of Okumura's latest patents is a water cooling system for a marine propulsion unit. This system features a pressure-sensitive valve device that interacts with the coolant line pressure of an engine cooling jacket. The valve opens when the pressure difference between the coolant input and output regions exceeds a predetermined limit, allowing coolant to flow through. Additionally, a temperature-sensitive valve device is included to manage coolant flow during low RPM operations, while the pressure-sensitive valve takes over at high RPMs, ensuring optimal cooling across the engine's operating range.
Another significant patent is an exhaust system for a two-stroke engine. This design incorporates an exhaust supercharging arrangement for a two-cycle internal combustion engine. The arrangement minimizes torque and heating loading on the engine by coordinating the firing order of the cylinders, allowing for efficient exhaust management.
Career Highlights
Throughout his career, Shigeo Okumura has worked with prominent companies such as Sanshin Kogyo and Yamaha Motor Co., Ltd. His experience in these organizations has contributed to his expertise in marine propulsion systems and engine technology.
Collaborations
Okumura has collaborated with notable colleagues, including Motoi Tobinaga and Shinya Atsumi. Their combined efforts have led to advancements in marine engine technology and innovative solutions for various challenges in the field.
Conclusion
Shigeo Okumura's contributions to marine propulsion technology through his patents and collaborations highlight his role as a key innovator in the industry. His work continues to influence the development of efficient and effective marine engine systems.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile