Location History:
- Hitachi, JA (1977)
- Ibaraki, JP (1978)
- Hitachi, JP (1991)
Company Filing History:
3 out of 42,488 
1 out of 6 Years Active: 1977-1991
Title: Kuniaki Kubokura: Innovator in Motor Technology
Introduction
Kuniaki Kubokura is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of motor technology, holding a total of 3 patents. His work focuses on enhancing the efficiency and safety of motor-operated devices.
Latest Patents
One of his latest patents is for a permanent magnet reversible synchronous motor. This invention features a rotor with a core fixed to a motor shaft and an even number of permanent magnets arranged circumferentially. The design includes projecting portions shaped as protruding parts of the rotor core over each permanent magnet. The width of these projecting portions differs from the pitch of the stator slots. Additionally, a position detector is integrated to monitor the rotor's permanent magnet position, ensuring precise control during both normal and reverse rotations.
Another significant patent is a protective device for a motor-operated sewing machine. This device controls the machine's revolutions through a motor equipped with a clutch and brake mechanism. It includes detectors that monitor the rotation of the driving shaft and the voltage of the control circuit. By comparing the output from these detectors with a reference value, the device ensures safe operation by terminating the control circuit when necessary.
Career Highlights
Kuniaki Kubokura has worked with prominent companies such as Hitachi, Ltd. and Hitachi Taga Engineering, Ltd. His experience in these organizations has allowed him to develop innovative solutions in motor technology.
Collaborations
Throughout his career, Kubokura has collaborated with notable coworkers, including Jun Matsubayashi and Fumio Tajima. These partnerships have contributed to the advancement of his inventions and the overall progress in the field.
Conclusion
Kuniaki Kubokura's contributions to motor technology through his patents and collaborations highlight his role as an influential inventor. His work continues to impact the industry, ensuring safer and more efficient motor-operated devices.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.