Shigeru Toyosumi

Title: Innovations of Shigeru Toyosumi

Introduction

Shigeru Toyosumi is a notable inventor based in Obu, Japan. He has made significant contributions to the field of gear transmission technology, holding a total of three patents. His work focuses on improving the efficiency and accuracy of gear systems, which are essential in various mechanical applications.

Latest Patents

One of Toyosumi's latest patents is a step-up or reduction gear series that utilizes an internally meshing planetary gear structure. This innovative design features a first shaft with eccentric bodies and external gears mounted on these bodies through bearings. An internal gear meshes with the external gears, while a second shaft connects to the external gears, transmitting only the rotational component. This series includes various sub-series of transmission gears that differ in speed change ratios, yet maintain the same mating dimensions for installation. Additionally, the transmission gears in the same sub-series are designed to minimize angular backlash, enhancing performance.

Another significant patent is the inscribed meshing planetary gear construction. This design improves the accuracy of gear assembly by ensuring that external teeth cut at the same position do not mesh simultaneously with the internal-tooth gear during operation. This approach, contrary to conventional methods, allows for better accuracy after assembly, even when using machines with similar processing accuracy. The design also allows for simultaneous cutting of external teeth and various holes, significantly improving the positional relationship between these components.

Career Highlights

Shigeru Toyosumi is currently employed at Sumitomo Heavy Industries, Ltd., where he continues to innovate in the field of gear technology. His work has contributed to advancements in mechanical engineering and has been recognized for its practical applications in various industries.

Collaborations

Toyosumi collaborates with talented coworkers, including Kiyoji Minegishi and Takashi Haga. Their combined expertise fosters a creative environment that drives innovation and enhances the development of new technologies.

Conclusion

Shigeru Toyosumi's contributions to gear transmission technology exemplify the spirit of innovation. His patents reflect a deep understanding of mechanical systems and a commitment to improving their efficiency and accuracy. Through his work at Sumitomo Heavy Industries, he continues to influence the field and inspire future advancements.