Company Filing History:
3 out of 9 
3 out of 12 Years Active: 2015
Title: Ryouhei Yamashita: Innovator in Engine-Driven Technology
Introduction
Ryouhei Yamashita is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of engine-driven machinery, holding a total of 3 patents. His work focuses on improving the efficiency and reliability of hand-carried engine-driven working machines.
Latest Patents
One of his latest patents is a speed reduction method for hand-carried engine-driven working machines. This method ensures reliable and safe speed reduction by preventing the lean come-down phenomenon while the engine operates within a practical revolution speed range. The system calculates acceleration based on changes in revolution speed and adjusts ignition timing and fuel flow rate to maintain engine performance during deceleration.
Another significant patent is a fuel control method for hand-carried engine-driven working machines. This innovation automatically adjusts the opening of a solenoid valve after the engine starts, optimizing the air-fuel ratio for stable engine operation. By controlling the fuel flow rate based on detected rotation speed, the combustion state in the engine is optimized, ensuring efficient performance even under abrupt load changes.
Career Highlights
Ryouhei Yamashita has worked with several companies, including Iida Denki Kogyo Co., Ltd. and Z Ama Japan Co., Ltd. His experience in these organizations has contributed to his expertise in engine technology and innovation.
Collaborations
Throughout his career, Ryouhei has collaborated with talented individuals such as Akira Yamazaki and Tamotsu Saitou. These partnerships have likely enriched his work and led to further advancements in his field.
Conclusion
Ryouhei Yamashita is a distinguished inventor whose work in engine-driven technology has led to valuable patents that enhance the performance and reliability of machinery. His contributions continue to impact the industry positively.