This inventor holds 3 USPTO granted patents. Top assignees: Nippondenso Co., Ltd., Nippon Soken, Inc., Toyota Jidosha Kogyo Kabushiki Kaisha. Active years: 1979-1984.
Company Filing History:
2 out of 3,252 
1 out of 1,600 
1 out of 1,838 Years Active: 1979-1984
Title: Tomio Kumoi: Innovator in Engine Technology
Introduction
Tomio Kumoi is a notable inventor based in Kariya, Japan. He has made significant contributions to engine technology, particularly in the development of systems that enhance engine performance and efficiency. With a total of 3 patents to his name, Kumoi's work reflects a deep understanding of combustion processes and electrical engineering.
Latest Patents
Kumoi's latest patents include an innovative after glow control system for engines. This system controls the voltage applied to glow plugs during both the preheating and after glow periods. It features a first electric path for preheating and a second parallel electric path for after glow, which includes a voltage dropping circuit with a switching means. The switching control circuit ensures that the voltage remains nearly equal to a set voltage, which can be adjusted based on engine temperature.
Another significant invention is a ceramic heater designed to function as a glow plug for igniting air-fuel mixtures in internal combustion engines. This ceramic heating element is housed in a metal casing and features a heat generating section that is exposed to the engine's cylinder. The design allows for efficient heating and ignition, enhancing engine performance.
Career Highlights
Throughout his career, Kumoi has worked with reputable companies such as Nippondenso Co., Ltd. and Nippon Soken, Inc. His experience in these organizations has contributed to his expertise in engine technology and innovation.
Collaborations
Kumoi has collaborated with notable coworkers, including Hitoshi Yoshida and Shunzo Yamaguchi. Their combined efforts have likely led to advancements in the field of engine technology.
Conclusion
Tomio Kumoi's contributions to engine technology through his patents and collaborations highlight his role as an innovator in the automotive industry. His work continues to influence the development of more efficient and effective engine systems.