Location History:
- San Jose, CA (US) (1982)
- Tokyo, JP (2004)
- Hitachi, JP (1980 - 2005)
Company Filing History:
Years Active: 1980-2005
Title: Jiro Kuniya: Innovator in Valve Technology
Introduction
Jiro Kuniya is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of valve technology, holding a total of 15 patents. His innovative work focuses on enhancing the performance and durability of valves through advanced materials and manufacturing methods.
Latest Patents
Among his latest patents is a valve and manufacturing method that features a cobalt-free design, which excels in wear resistance and seizure resistance. This valve is manufactured by forming valve seats for a valve disc and a valve body using a nickel base alloy, where silicide or boride particles of small size are finely dispersed. The valve seat is bonded to the valve disc or body using an insert material made of a nickel base alloy with a lower melting point, achieved through transient liquid phase diffusion bonding. Another notable patent involves the joint construction of cobalt-based alloy, where a cobalt-based alloy layer, containing granular or massive eutectic carbide, is joined to a base metal via an insert metal layer. This process is performed at a temperature of 1100°C for a retention time of one hour, ensuring a robust bond between the materials.
Career Highlights
Jiro Kuniya is associated with Hitachi, Ltd., a leading company in technology and innovation. His work has significantly impacted the development of advanced valve systems, showcasing his expertise in materials science and engineering.
Collaborations
Throughout his career, Kuniya has collaborated with notable colleagues, including Takahiko Kato and Mitsuo Chigasaki. These partnerships have fostered a collaborative environment that enhances innovation and drives technological advancements.
Conclusion
Jiro Kuniya's contributions to valve technology exemplify the importance of innovation in engineering. His patents reflect a commitment to improving performance and durability in industrial applications. His work continues to influence the field and inspire future advancements in valve technology.