This inventor holds 4 USPTO granted patents and 1 published patent application. Top assignees: Kajima Corporation, Kayaba Kogyo Kabushiki Kaisha, Mitsubishi Hitachi Power Systems, Ltd.. Active years: 1991-2018.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
3 out of 152 
1 out of 95 
1 out of 651 Years Active: 1991-2018
Title: Innovations by Junichi Hirai
Introduction
Junichi Hirai is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of engineering, particularly in the development of advanced cutting tools and hydraulic systems. With a total of 4 patents to his name, Hirai's work reflects a commitment to innovation and practical solutions in engineering.
Latest Patents
One of Hirai's latest patents is a side milling cutter for slot cutting. This innovative tool is designed to dampen vibrations even when multiple nodes are generated in the cutting part. The side milling cutter features a disc-shaped design with several cartridges as cutting edges, which are strategically placed along the outer circumference. This allows for precise slot cutting on workpieces through circumferential rotation. Additionally, the cutter incorporates vibration damping structures within its design, enhancing its performance.
Another significant patent is a cylinder lock device for use in structures. This hydraulically-operated piston device is installed between the frame of a structure and a separate vibration-resisting element. It allows for the adjustment of the frame's rigidity by changing the connection conditions between the frame and the vibration-resisting element. The device's operation is controlled by a valve, which can be adjusted to modify the coefficient of damping. This innovation provides flexibility and maximum rigidity as needed, showcasing Hirai's expertise in hydraulic systems.
Career Highlights
Throughout his career, Junichi Hirai has worked with prominent companies such as Kajima Corporation and Kayaba Kogyo. His experience in these organizations has contributed to his development as an inventor and has provided him with valuable insights into engineering practices.
Collaborations
Hirai has collaborated with notable coworkers, including Takuji Kobori and Motoichi Takahashi. These partnerships have likely fostered a creative environment that encourages innovation and the sharing of ideas.
Conclusion
Junichi Hirai's contributions to engineering through his patents and collaborations highlight his role as a significant inventor in the field. His innovative designs, particularly in cutting tools and hydraulic systems, demonstrate his commitment to advancing technology.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile