Location History:
- Hamamatsu, JP (1994 - 2002)
- Shizuoka-ken, JP (2009)
- Shizuoka, JP (2002 - 2013)
Company Filing History:
5 out of 1,061 
3 out of 4,244 
2 out of 279 
Years Active: 1994-2013
Title: Hiroyuki Tsunekawa: Innovator in Marine Propulsion Technology
Introduction
Hiroyuki Tsunekawa is a prominent inventor based in Shizuoka, Japan. He has made significant contributions to the field of marine propulsion technology, holding a total of 10 patents. His innovative designs focus on enhancing the efficiency and functionality of marine vessels.
Latest Patents
Among his latest patents is a propeller unit for a marine vessel propulsion device. This propeller unit features an inner cylinder fixed to the propeller shaft, an outer cylinder, and two driving force transmitting members. The design includes engaging portions that allow for the disengagement of the driving force when not in use, ensuring optimal performance when needed. Another notable patent is a boat propulsion system that incorporates a drive bevel gear and a dog clutch. This system is designed to minimize sound and impact during operation, even when variations in thrust force occur.
Career Highlights
Hiroyuki Tsunekawa has worked with notable companies such as Sanshin Kogyo Kabushiki Kaisha and Yamaha Hatsudoki Kabushiki Kaisha. His experience in these organizations has allowed him to refine his skills and contribute to advancements in marine technology.
Collaborations
Throughout his career, Tsunekawa has collaborated with talented individuals, including Kouji Abe and Takaji Kawai. These partnerships have fostered innovation and creativity in his projects.
Conclusion
Hiroyuki Tsunekawa's work in marine propulsion technology exemplifies his dedication to innovation and improvement in the industry. His patents reflect a commitment to enhancing the performance and efficiency of marine vessels.