Company Filing History:
3 out of 42,488 
1 out of 3 Years Active: 1993-2003
Title: Naoyuki Yamamoto: Innovator in Gas Insulated Circuit Breakers
Introduction
Naoyuki Yamamoto is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of gas-insulated circuit breakers. With a total of 3 patents to his name, Yamamoto's work has had a lasting impact on the industry.
Latest Patents
Yamamoto's latest patents include innovative designs for gas-blast circuit breakers and gas-insulated circuit breakers. The gas-blast circuit breaker features a movable arc contact and a fixed arc contact, along with an insulating nozzle and a puffer cylinder. This design allows for the effective ejection of insulating gas to cool the arc generated during current interruption. The hollow conductor in this circuit breaker is uniquely shaped to optimize the flow of insulating gas, ensuring both cooling and insulation performance.
The gas-insulated circuit breaker patent describes a closed tank filled with insulation gas, which houses a pair of separable contacts. This design includes an opening spring and a closing spring, along with an actuating mechanism that responds to circuit opening and closing commands. The innovative structure of this circuit breaker enhances its operational efficiency and reliability.
Career Highlights
Yamamoto has worked with notable companies such as Hitachi, Ltd. and Hitachi Electric Systems Co., Ltd. His experience in these organizations has allowed him to refine his expertise in electrical engineering and contribute to groundbreaking innovations in circuit breaker technology.
Collaborations
Throughout his career, Yamamoto has collaborated with esteemed colleagues, including Kenji Iwabuchi and Manabu Takamoto. These partnerships have fostered a creative environment that has led to the development of advanced technologies in the field.
Conclusion
Naoyuki Yamamoto's contributions to the field of electrical engineering, particularly in gas-insulated circuit breakers, demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to enhancing the safety and efficiency of electrical systems.