Nobuyuki Yajima

Title: Nobuyuki Yajima: Innovator in Membrane Structures and Gas Transmission Measurement

Introduction

Nobuyuki Yajima is a prominent inventor based in Sagamihara, Japan. He has made significant contributions to the fields of membrane structures and gas transmission measurement. With a total of five patents to his name, Yajima's work showcases his innovative spirit and technical expertise.

Latest Patents

One of Yajima's latest patents is a membrane structure that includes an airtight pressure-resistant gasbag. This gasbag features a shape-maintaining mechanism that preserves its predetermined shape when fully inflated. The design incorporates a plurality of spindle-shaped gores made from airtight membrane material, with adjacent gores joined at their edges. Additionally, reinforcing ropes are attached to the joined sections, extending along the edges. Each gore protrudes outwardly between two adjacent reinforcing ropes without elongating the membrane material when fully inflated. The radius of curvature of each protruding gore is smaller than that of the gasbag itself.

Another notable patent involves a method for measuring the gas transmission rate of plastic film, along with the associated measuring apparatus and computer program product. In this method, a gas is sealed within a test film bag made from a plastic film. The mass of the bag is measured multiple times while maintaining a constant temperature in a vessel filled with a different gas. The transmission rate of the gas is then computed based on the relationship between the measurement results, the mass of the test film bag, and its surface area.

Career Highlights

Yajima has held significant positions throughout his career, including serving as the Director-General of the Institute of Space and Astronautical Science and as part of the Japan Aerospace Exploration Agency. His leadership in these organizations has contributed to advancements in aerospace technology and research.

Collaborations

Yajima has collaborated with notable colleagues, including Naoki Izutsu and Hideyuki Honda. Their combined expertise has furthered the development of innovative technologies in their respective fields.

Conclusion

Nobuyuki Yajima's contributions to membrane structures and gas transmission measurement highlight his role as a leading inventor in Japan. His patents reflect a commitment to innovation and technical excellence, making a lasting impact in the field.