Takeshi Hirasawa

Title: The Innovative Contributions of Takeshi Hirasawa

Introduction

Takeshi Hirasawa is a notable inventor based in Shizuoka, Japan. He has made significant contributions to the field of marine engineering, particularly in the design of internal combustion engines for watercraft. With a total of 3 patents to his name, Hirasawa's work reflects a commitment to enhancing the performance and efficiency of watercraft engines.

Latest Patents

One of Hirasawa's latest patents is a multiple valve engine for watercraft. This innovative engine design features an improved construction that balances the weight of the engine between the port and starboard sides of the watercraft hull. The hull defines a center plane extending vertically from bow to stern. The engine includes a cylinder body that defines at least one cylinder bore, with the axis of the cylinder bore inclined from the center plane. The design incorporates at least two intake passages that communicate with a combustion chamber, where intake valves selectively connect and disconnect these passages. Additionally, the engine includes at least one exhaust passage and an exhaust valve that operates similarly. Notably, the intake valves are positioned closer to the center plane than the exhaust valve(s).

Another significant patent is a lubricant filter mounting structure for internal combustion engines. This structure features a lubricant filter mounting surface positioned at an angle to a vertical plane, along with a catch member located directly below the lubricant filter. This design enhances access to the filter, especially within the confined engine compartments of personal watercraft, by allowing portions of the induction and exhaust systems to be removeably mounted to the engine.

Career Highlights

Throughout his career, Hirasawa has worked with prominent companies in the marine industry, including Sanshin Kogyo and Yamaha Marine. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in marine technology.

Collaborations

Hirasawa has collaborated with various professionals in his field, including his coworker Tetsuya Mashiko. These collaborations have fostered an environment of creativity and innovation, leading to the development of cutting-edge technologies in watercraft engineering.

Conclusion

Takeshi Hirasawa's contributions to marine engineering through his patents and collaborations highlight his role as a significant inventor in the industry. His innovative designs continue to influence the development of more efficient and effective watercraft engines.