Location History:
- Kofu, JP (1989 - 1991)
- Yamanashi, JP (1993)
Company Filing History:
Years Active: 1989-1993
Title: The Innovations of Tamotsu Iijima
Introduction
Tamotsu Iijima is a notable inventor based in Kofu, Japan. He has made significant contributions to the field of ultrasonic actuators, holding a total of three patents. His work focuses on enhancing the efficiency and functionality of ultrasonic devices.
Latest Patents
One of Iijima's latest patents is an ultrasonic actuator that features an elastic vibration member shaped like a rectangular plate. This actuator is excited by vibrators attached to its broadest excitation surfaces, which induces both longitudinal and bending vibrations. The design allows for the extraction of vibrational motion by pressing a moving object against one of the slender planes perpendicular to the excitation surfaces. This configuration ensures that the vibrational characteristics remain unchanged, enabling high-efficiency operation.
Another significant patent is for a vibration-coupling type ultrasonic actuator and its operating method. This actuator utilizes longitudinal and bending vibrations that are effectively coupled by controlling the piezoelectricity generated in one of the piezoelectric members attached to the elastic vibrational member. By discharging the electric charge induced in the piezoelectric member due to vibrations, the stiffness of the piezoelectric member varies, creating electrical asymmetry within the vibrational member. This innovation allows the actuator to be activated by single-phase alternating current with high efficiency.
Career Highlights
Throughout his career, Tamotsu Iijima has worked with prominent companies such as Nisca Corporation and Nippon Seimitsu Kogyo Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in the development of advanced ultrasonic technologies.
Collaborations
Iijima has collaborated with various professionals in his field, including his coworker Kazuhide Sano. Their joint efforts have furthered the advancements in ultrasonic actuator technology.
Conclusion
Tamotsu Iijima's innovative work in ultrasonic actuators showcases his dedication to enhancing technology in this field. His patents reflect a commitment to efficiency and functionality, making him a significant figure in the world of inventions.
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