Masahiro Nobutomo

Title: Masahiro Nobutomo: Innovator in Variable-Speed Drive Technology

Introduction

Masahiro Nobutomo is a distinguished inventor based in Shizuoka, Japan. He has made significant contributions to the field of mechanical engineering, particularly in the development of innovative drive systems. With a total of 4 patents to his name, Nobutomo's work has garnered attention for its practicality and efficiency.

Latest Patents

One of his latest inventions is a belt type infinite variable-speed drive. This innovative drive utilizes a ball-screw mechanism that is both compact and noise-free. The design features a nut of the ball-screw mechanism fixed to a casing, with a threaded shaft rotatably coupled to a movable pulley member through a ball bearing. This configuration allows the ball circulating portions on the nut to remain stationary while the movable pulley member can move axially. The orientation of the ball circulating portions minimizes load on the ball-screw mechanism, enabling a compact design and reducing noise from ball vibrations.

Another notable patent is the driving device for injection molding machines. This device includes an injection unit driving mechanism or a mold-clamping unit driving mechanism that features a long-lasting ball screw. In this design, only the balls of the ball screw undergo carburizing and nitriding treatment, while the threaded shaft and nut are subjected to conventional hardening. This approach enhances the durability and efficiency of the driving device.

Career Highlights

Masahiro Nobutomo is currently employed at NTN Corporation, where he continues to innovate and develop advanced mechanical systems. His work has significantly impacted the efficiency and performance of various industrial applications.

Collaborations

Throughout his career, Nobutomo has collaborated with notable colleagues, including Isamu Yoshida and Takayuki Owada. These partnerships have fostered a creative environment that encourages the development of cutting-edge technologies.

Conclusion

Masahiro Nobutomo's contributions to the field of variable-speed drive technology exemplify his commitment to innovation and excellence. His patents reflect a deep understanding of mechanical systems and a dedication to improving industrial processes. His work continues to influence the industry and inspire future innovations.