Company Filing History:
2 out of 42,496 
1 out of 3 Years Active: 1980-1997
Title: **Innovative Contributions of Yositeru Chiba**
Introduction
Yositeru Chiba is a prominent inventor based in Hitachi, Japan, known for his significant contributions to valve technology and steel piping systems. With two patents to his name, Chiba's work demonstrates a commitment to enhancing the efficiency and safety of industrial applications, particularly in the context of nuclear reactors.
Latest Patents
Chiba's latest patents include several innovative designs and methods. The first is a **Valve having facing layers of cobalt-free Ni-base Alloy**, which involves hard facing layers applied to the engagement portions of a valve body and a valve box. This valve utilizes cobalt-free Ni-base alloys, showcasing a detailed composition, including specific percentages of chromium, silicon, iron, and tungsten, aimed at improving durability and corrosion resistance. This valve apparatus is particularly suited for installation in water pipelines that connect to nuclear reactors.
Another notable patent is the **Method of cooling weld in steel piping and apparatus therefor**. This patent outlines a method that cools welds in steel piping using a liquid medium, allowing for more controlled cooling during the welding process. The accompanying apparatus includes a rotatable multi-nozzle assembly designed to enhance the injection of the cooling medium against the inner surface of the piping, thereby improving the quality of the weld and the integrity of the piping system.
Career Highlights
Throughout his career, Yositeru Chiba has been associated with notable companies including Hitachi, Ltd., and Hitachi Kyowa Kogyo Co., Ltd. His extensive experience in the field is reflected in his innovative work, propelling advancements that benefit several industrial sectors.
Collaborations
Chiba has collaborated with esteemed colleagues such as Katsuyuki Imai and Isao Masaoka. Their teamwork has resulted in significant developments in valve technology and welding methods, further enhancing Chiba's contributions.
Conclusion
Yositeru Chiba's work exemplifies the spirit of innovation essential for advancing technology in key industrial applications. Through his patents, he has made meaningful contributions that not only demonstrate technical expertise but also strive toward greater efficiency and safety within engineering practices. His ongoing influence in the field ensures a legacy of improvement in the technologies he has worked upon.