Location History:
- Kawasaki, JP (2009)
- Tokyo, JP (2012 - 2016)
Company Filing History:
5 out of 22 
2 out of 3,328 
Years Active: 2009-2016
Title: Nobuyuki Sema: Innovator in Railcar Technology
Introduction
Nobuyuki Sema is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of railcar technology, holding a total of 5 patents. His innovative designs focus on enhancing the efficiency and safety of rail systems.
Latest Patents
Among his latest patents, Sema has developed a circuit breaking unit and a railcar that incorporates this technology. The railcar features a power collector designed to gather electric power from overhead contact lines. The circuit breaking unit is strategically placed on the roof of the car and is connected to a series of electric power cables. This unit includes a circuit breaker positioned above the roof, which is linked to the power collector, and a branch joint that connects the electric power cables.
Another notable invention is the high voltage device system for railcars. This system consists of multiple high voltage devices that receive electric power from overhead lines. It includes high-voltage cables that interconnect these devices and a joint device for cable connections. Each high-voltage cable is equipped with connector portions designed for secure connections, ensuring the reliability of the system.
Career Highlights
Nobuyuki Sema has worked with several notable companies throughout his career. He has been associated with Showa Cable Systems Co., Ltd. and Kawasaki Jukogyo Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in railcar technology and electrical systems.
Collaborations
Sema has collaborated with talented individuals in his field, including Kazuhisa Adachi and Hiroyuki Kawasaki. These partnerships have fostered innovation and have led to the development of advanced technologies in rail systems.
Conclusion
Nobuyuki Sema's contributions to railcar technology through his patents and collaborations highlight his role as a key innovator in the industry. His work continues to influence the future of rail transportation systems.