Tomiyasu Onuma

Title: Tomiyasu Onuma: Innovator in Mechanical Engineering

Introduction

Tomiyasu Onuma is a notable inventor based in Katsuta, Japan. He has made significant contributions to the field of mechanical engineering, particularly through his innovative designs and patents. With a total of 2 patents, Onuma has demonstrated his expertise and creativity in developing advanced mechanical solutions.

Latest Patents

Onuma's latest patents include a joint having a ball and shaft coupled through plastic deformation and a fluid machine. The joint structure is designed for bonding a ball portion and a shaft portion, where the ball includes a mounting hole bored toward its center. A corrugated surface is formed in the inner circumferential surface of the mounting hole to enhance the bonding process. The shaft portion, made of a softer material than the ball portion, is fitted into the mounting hole, and the outer circumferential portion of the shaft is plastically deformed to create a strong bond between the two components.

The fluid machine patent features a cylinder block mounted on a rotary shaft, with a rotary plate intersecting the axis of the rotary shaft at an acute angle. This innovative design includes a gear engaging mechanism that allows for cyclic rotation, a piston supported by the rotary plate, and systems for suction and delivery operations. Additionally, it incorporates a spherical contact portion to manage thrust generated between the rotary plate and the rotary shaft, ensuring efficient operation.

Career Highlights

Tomiyasu Onuma is currently employed at Hitachi, Ltd., where he continues to contribute to advancements in mechanical engineering. His work at Hitachi has allowed him to collaborate with other talented engineers and inventors, further enhancing his skills and knowledge in the field.

Collaborations

Onuma has worked alongside notable colleagues such as Hisanobu Kanamaru and Kazushi Sasaya. These collaborations have fostered a creative environment that encourages innovation and the development of cutting-edge technologies.

Conclusion

Tomiyasu Onuma is a distinguished inventor whose work in mechanical engineering has led to significant advancements in joint structures and fluid machines. His contributions continue to impact the industry positively, showcasing the importance of innovation in engineering.