Location History:
- Tokyo, JP (2005)
- Tsukuba, JP (2008 - 2012)
Company Filing History:
6 out of 141 
3 out of 83 
2 out of 1,960 
Years Active: 2005-2012
Title: Innovations of Katsumi Fujima
Introduction
Katsumi Fujima is a notable inventor based in Tsukuba, Japan. He has made significant contributions to the field of refrigeration technology, holding a total of six patents. His work focuses on improving the efficiency and functionality of refrigerant systems.
Latest Patents
Fujima's latest patents include a refrigerant circulating pump, a refrigerant circulating pump system, a method of pumping refrigerant, and a Rankine cycle system. The Rankine cycle system features a condenser, a refrigerant circulating pump connected to the condenser, a heat collecting device, and an expansion turbine. The refrigerant circulating pump is designed with an expansion tank or pressure vessel, a refrigerant supply conduit, and a refrigerant discharge conduit. It also includes an open/close valve in the refrigerant supply conduit and a pressure regulating valve that opens at a specified pressure. Additionally, a temperature regulating device can heat the refrigerant in the expansion tank to produce vapor at saturated temperature or higher.
Another innovative patent is a CO cooling and heating apparatus and method that allows for the simultaneous production of high-temperature and low-temperature heat sources. This system utilizes carbon dioxide as a refrigerant and incorporates a first refrigerating cycle circuit that compresses the refrigerant to a supercritical zone. The apparatus can include multistage compressors and an intermediate cooler, along with a second refrigerating cycle circuit for efficient heat exchange.
Career Highlights
Fujima has worked with prominent companies such as Mayekawa Manufacturing Co., Ltd. and Doshisha University. His experience in these organizations has contributed to his expertise in refrigeration technologies and systems.
Collaborations
Throughout his career, Fujima has collaborated with notable individuals, including Hiroshi Yamaguchi and Choiku Yoshikawa. These partnerships have likely enhanced his innovative capabilities and broadened his impact in the field.
Conclusion
Katsumi Fujima is a distinguished inventor whose work in refrigeration technology has led to several important patents. His contributions continue to influence the industry and showcase the potential for innovation in this field.