Tatsuo Hirai

Title: Innovations of Tatsuo Hirai

Introduction

Tatsuo Hirai is a notable inventor based in Otsu, Japan. He has made significant contributions to the field of fastening technology, holding a total of nine patents. His work focuses on developing devices that enhance the efficiency and reliability of tightening processes.

Latest Patents

Hirai's latest patents include a tightening device and a tightening method. These innovations allow for the verification that a fastening member has been secured to a desired set torque or greater after being tightened, without the need to loosen the fastening member. The tightening device executes a first tightening process that adjusts the output of a motor after the measured torque reaches a preset first control start torque. This process ensures that the measured torque reaches a preset first set torque in a phased manner through repeated increases and decreases in torque. The device then blocks power supply to the motor when the measured torque reaches the first set torque. Following this, a second tightening process is initiated, which drives the motor at an initial output that is less than in the first process. This method also involves adjusting the motor output after the measured torque reaches a preset second control start torque, ensuring that the measured torque reaches a preset second set torque in a similar phased manner.

Career Highlights

Throughout his career, Tatsuo Hirai has worked with several companies, including Maeda Metal Industries and Tone Co., Ltd. His experience in these organizations has contributed to his expertise in fastening technologies and patent development.

Collaborations

Hirai has collaborated with notable colleagues such as Yasunobu Kaneyama and Toshihiko Kushida. Their combined efforts have further advanced the innovations in the field of fastening devices.

Conclusion

Tatsuo Hirai's contributions to fastening technology through his patents demonstrate his commitment to innovation and improvement in this essential area. His work continues to influence the industry and enhance the reliability of fastening processes.