This inventor holds 9 USPTO granted patents and 1 published patent application, plus 3 CIPO patents and 1 EPO patent. Top assignees: Hitachi, Ltd., Hitachi-Ge Nuclear Energy, Ltd.. Active years: 2002-2011.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2002-2011
Title: Masakazu Hisatsune: Innovator in Pipe Stress Management
Introduction
Masakazu Hisatsune is a notable inventor based in Hitachi, Japan. He has made significant contributions to the field of engineering, particularly in methods for improving residual stress in pipes. His innovative approaches have led to the development of several patents that enhance the durability and reliability of welded pipe structures.
Latest Patents
Hisatsune holds a total of 9 patents. One of his latest patents is a method for improving residual stress in pipes and apparatus. This method involves converting tensile residual stress on the inner surface of a welded part of a pipe to compressive residual stress using ice plugs formed by cooling the pipe from the outer surface. The process includes placing refrigerant containers for forming the ice plugs upstream and downstream of a butt-welded part, cooling the outer surface of the pipe to create the ice plugs, and then further cooling the outer surface with at least one refrigerant container for expanding the pipe. This method is particularly effective when applied to pipes with large inside diameters, including curved pipes, elbows, or branch pipes.
Career Highlights
Throughout his career, Masakazu Hisatsune has worked with prominent companies such as Hitachi, Ltd. and Hitachi GE Nuclear Energy, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to significant advancements in engineering practices.
Collaborations
Hisatsune has collaborated with notable coworkers, including Satoru Aoike and Kenji Araki. Their combined expertise has fostered an environment of innovation and creativity in their projects.
Conclusion
Masakazu Hisatsune's work in improving residual stress management in pipes showcases his dedication to engineering innovation. His patents reflect a commitment to enhancing the safety and performance of welded structures. His contributions continue to influence the field and inspire future advancements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile