Company Filing History:
1 out of 1 
1 out of 2 
1 out of 1 Years Active: 1991
Title: Seiji Iwasa: Innovator in Shield Tunneling Technology
Introduction
Seiji Iwasa is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of tunneling technology, particularly through his innovative methods and machinery. His work has paved the way for advancements in the construction and engineering sectors.
Latest Patents
Iwasa holds a patent for a method titled "Shield tunneling with optional section and machine." This patent describes a shield tunneling method that allows for the excavation of a tunnel with an optional cross-section. The method involves rotating a center cutter about an axis extending in the direction of propulsion while revolving a planetary cutter around the axis. This design enables the excavation of the region between the profile of excavation by the center cutter and the desired profile of excavation. The machine designed for this method includes a center cutter supported by the body of the machine, a rotary body, and a planetary cutter that can move radially to excavate effectively.
Career Highlights
Throughout his career, Seiji Iwasa has worked with several prominent companies, including the Zaidan Hohjin Doboku Kenkyu Center and Nittoku Kensetsu Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in tunneling technology and innovation.
Collaborations
Iwasa has collaborated with notable colleagues such as Shohei Chida and Masami Kozaki. Their teamwork has likely enhanced the development and implementation of innovative tunneling solutions.
Conclusion
Seiji Iwasa's contributions to shield tunneling technology demonstrate his commitment to innovation in engineering. His patented methods and collaborative efforts have significantly impacted the field, showcasing the importance of creativity and teamwork in advancing technology.