Location History:
- Kusatsu, JP (1988 - 1989)
- Otsu, JP (1995 - 2007)
- Osaka, JP (2011)
- Shiga, JP (2000 - 2015)
Company Filing History:
20 out of 27,375 
3 out of 16,453 
1 out of 13,289 Years Active: 1988-2015
Title: Innovations of Kiyoshi Sawai: A Pioneer in Rotary Compressors and Air Pumps
Introduction: Kiyoshi Sawai, a notable inventor based in Shiga, Japan, has made significant contributions to the field of engineering through his innovative designs and technological advancements. With a remarkable portfolio of 24 patents, Sawai has been instrumental in enhancing the performance and efficiency of various mechanical systems, particularly in rotary compressors and air pumps.
Latest Patents: Among his latest innovations, Sawai developed a unique rotary compressor that features a vane rotary type design. This invention optimizes the eccentric portion of the shaft, positioning it radially inwardly, which minimizes the diameter of the eccentric portion. This reduction leads to a decrease in the viscous force of oil acting between the shaft and the inner surface of the piston, effectively lowering the rotational moment and sliding losses associated with the reciprocating motion of a vane in its groove. Additionally, he has patented an advanced air pump that secures a prolonged lifetime for mobile-use fuel cells while maintaining stable pump performance. By integrating the shafts of the pump and the motor section and supporting them with multiple ball bearings, this design prevents bearing seizure and abnormal wear, ensuring grease remains contained in closed spaces even under high environmental temperatures.
Career Highlights: Kiyoshi Sawai's impressive career includes tenures at renowned companies such as Matsushita Electric Industrial Co., Ltd. and Panasonic Corporation. His work in these organizations has allowed him to collaborate on groundbreaking projects, leading to his extensive collection of patents that reflect his ingenuity and commitment to advancing technology.
Collaborations: Throughout his career, Sawai has collaborated with esteemed colleagues, including Noboru Iida and Takashi Morimoto. These partnerships have enriched his inventions and fostered an environment of creativity and shared knowledge.
Conclusion: Kiyoshi Sawai's innovative spirit and dedication to engineering have cemented his position as a leading inventor in Japan. His patents not only contribute to the technological landscape but also pave the way for future advancements in rotary compressors and air pump systems.