Location History:
- Aichi, JP (1999 - 2005)
- Kariya, JP (1996 - 2007)
Company Filing History:
7 out of 1,343 
2 out of 1,819 
1 out of 288 Years Active: 1996-2007
Title: Eiji Tokunaga: Innovator in Compressor Technology
Introduction
Eiji Tokunaga is a prominent inventor based in Kariya, Japan, known for his significant contributions to compressor technology. With a total of nine patents to his name, Tokunaga has made remarkable advancements in the field, particularly in variable displacement compressors.
Latest Patents
One of his latest patents is the "Swash Plate Type Variable Displacement Compressor." This innovative design includes a cylinder block that defines a cylinder bore, with a housing fixed to the cylinder block that defines a crank chamber. A drive shaft is rotatably supported by both the housing and the cylinder block. The swash plate, supported by the drive shaft in the crank chamber, is inclinable with respect to the axis of the drive shaft. A piston is accommodated in the cylinder bore, defining a compression chamber, and is coupled to the swash plate. The control mechanism features a bleed passage for regulating the pressure in the crank chamber. Notably, the compressor is designed to discharge lubricating oil in the crank chamber into at least one of the suction chamber, discharge chamber, and compression chamber while maintaining a maximum inclination angle of the swash plate.
Another significant patent is the "Method of Manufacturing a Valve Plate for Compressor." This method involves using a punch die with a convex and concave configuration at its tip end face, which is set at a press machine. The punch die is depressed against the surface of a valve plate to transfer the convex and concave configuration, resulting in roughened peripheral portions of the suction port and discharge port of the valve plate.
Career Highlights
Eiji Tokunaga has worked with notable companies, including Kabushiki Kaisha Toyoda Jidoshokki Seisakusho and Kabushiki Kaisha Toyota Jidoshokki. His experience in these organizations has contributed to his expertise in compressor technology and innovation.
Collaborations
Throughout his career, Tokunaga has collaborated with talented individuals such as Tetsuhiko Fukanuma and Takuya Okuno. These collaborations have likely fostered an environment of creativity and innovation, leading to the development of his patented technologies.
Conclusion
Eiji Tokunaga's contributions to compressor technology through his innovative patents and collaborations highlight his role as a significant inventor in the field. His work continues to influence advancements in compressor design and