Location History:
- Tochigi, JP (1988 - 1996)
- Tochigi-ken, JP (1996 - 1997)
- Oohira, JP (2005)
Company Filing History:
6 out of 42,508 
1 out of 2,333 
Years Active: 1988-2005
Title: Akihiko Ishiyama: Innovator in Compressor Technology
Introduction
Akihiko Ishiyama is a notable inventor based in Tochigi, Japan. He has made significant contributions to the field of compressor technology, holding a total of 6 patents. His innovative designs have improved the efficiency and performance of compressors used in various applications.
Latest Patents
Ishiyama's latest patents include a compressor featuring a tapered discharge valve and valve seat. This design incorporates a compression chamber for compressing working fluid, a discharge port, and a discharge valve that optimizes the flow of the working fluid. The tapered surface of the valve seat enhances the cross-sectional area of the discharge port, improving performance by reducing clearance volume. Another notable patent is for a rotary type compressor, which utilizes a roller made of cast iron with specific hardness and composition requirements. This design ensures durability and efficiency, making it suitable for demanding applications.
Career Highlights
Throughout his career, Akihiko Ishiyama has worked with prominent companies such as Hitachi, Ltd. and Hitachi Metals, Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in compressor technology.
Collaborations
Ishiyama has collaborated with talented individuals in his field, including Hiroaki Hata and Tadashi Iizuka. These partnerships have contributed to the advancement of his inventions and the overall progress in compressor technology.
Conclusion
Akihiko Ishiyama's contributions to compressor technology through his patents and collaborations highlight his role as an influential inventor. His work continues to impact the industry positively, showcasing the importance of innovation in engineering.