This inventor holds 2 USPTO granted patents. Top assignees: Tokyo Gas Company Limited, Ashimori Industry Co., Ltd.. Active years: 1984-1987.
Location History:
- Yokohama, JP (1984)
- Kanagawa, JP (1987)
Company Filing History:
2 out of 193 
1 out of 148 
Years Active: 1984-1987
Title: Hisao Ohtsuga: Innovator in Tubular Lining Technology
Introduction
Hisao Ohtsuga is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of pipeline technology, particularly through his innovative patents. With a total of 2 patents, Ohtsuga has developed solutions that enhance the efficiency and effectiveness of pipeline maintenance and repair.
Latest Patents
Ohtsuga's latest patents include a "Tubular Lining Material for Pipe Line" and a "Method and Apparatus for Providing the Inner Surface of a Pipe Line with a Tubular Lining Material." The first patent describes a tubular lining material designed for pipelines with large inner diameters and multiple bends. This material consists of a textile jacket made from crimped yarns of polybutylene terephthalate fibers, overlaid with a flexible synthetic resin coating. The design allows for easy insertion and application onto the inner surface of the pipeline, ensuring a good fit without wrinkles or flow path narrowing.
The second patent outlines a method and apparatus for applying the tubular lining material under fluid pressure. This innovative approach involves introducing the lining material in a flattened state into a pressure container, where it is then pushed forward within the pipeline. The method ensures that the lining material bonds effectively to the inner surface, providing a reliable solution for pipeline maintenance.
Career Highlights
Throughout his career, Ohtsuga has worked with prominent companies such as Tokyo Gas Company Limited and Ashimori Industry Co., Ltd. His experience in these organizations has contributed to his expertise in pipeline technology and innovation.
Collaborations
Ohtsuga has collaborated with notable individuals in his field, including Yoichi Sakaguchi and Akio Morinaga. These partnerships have likely fostered the exchange of ideas and advancements in pipeline technology.
Conclusion
Hisao Ohtsuga's contributions to pipeline technology through his innovative patents demonstrate his commitment to improving infrastructure solutions. His work continues to influence the industry and pave the way for future advancements.