Hirokazu Yashiro is a prominent inventor based in Gifu-ken, Japan. He has made significant contributions to the field of engineering, particularly in the development of advanced turbo-molecular pumps. With a total of 6 patents to his name, Yashiro's work has had a substantial impact on the industry.

Latest Patents

Yashiro's latest patents include innovative designs for a motor and a turbo-molecular pump. The first patent describes a compact turbo-molecular pump that boasts a high depressurizing capability. This pump features a motor for rotating a rotor vane, which includes an air bearing. The air bearing consists of a rotary cylinder and a fixed surface surrounding it. Notably, the material of the rotary cylinder has a coefficient of thermal expansion that is smaller than that of the fixed surface. This design ensures that changes in the dimensions of the rotary cylinder are minimized, preventing contact with the fixed surface even when the air bearing's temperature rises during pump operation.

The second patent focuses on a motor and pressure generating apparatus that incorporates the motor. This compact turbo-molecular pump also emphasizes high depressurizing capability. The motor driving the pump includes a rotary shaft, with both the distal and basal ends supported by magnetic bearings. Each magnetic bearing consists of a rotated magnet, which rotates integrally with the rotary shaft, and a fixed magnet that opposes the rotated magnet. The design ensures that the diameter of the magnetic bearing at the distal end of the rotary shaft is greater than that at the basal end, reducing the movement of the rotary shaft during pump operation.

Career Highlights

Hirokazu Yashiro is currently employed at Ibiden Company Limited, where he continues to innovate and develop cutting-edge technologies. His work has been instrumental in advancing the capabilities of turbo-molecular pumps, making them more efficient and reliable.

Collaborations

Yashiro has collaborated with notable colleagues, including Youichi Kuwayama and Hisashi Takahashi. Their combined expertise has contributed to the successful development of various projects within the company.

Conclusion

Hirokazu Yashiro's contributions to the field of turbo-molecular pump technology highlight his innovative spirit and dedication to engineering excellence. His patents reflect a commitment to improving the efficiency

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