Company Filing History:
1 out of 1,641 
1 out of 149 Years Active: 2016-2017
Title: **Innovations by Naoki Nishizawa: Pioneering Oil-Impregnated Sintered Bearings**
Introduction
Naoki Nishizawa, an accomplished inventor based in Kashiwa, Japan, has made significant contributions to the field of engineering through his innovative designs and patents. With a total of two patents to his name, he has focused primarily on improving the performance and functionality of bearings.
Latest Patents
The latest patent developed by Nishizawa is for an oil-impregnated sintered bearing and its production method. This innovative bearing is crafted from an iron-copper sintered alloy, consisting of 10-59% copper, 0.5-3% tin, with iron and impurities making up the balance. The unique design features a matrix with a minimum of 800 pores per mm, strategically exposed at 20-50% area ratio on the inner circumferential surface. These pores have various diameter classifications, ensuring optimal performance: diameters greater than 100 μm are limited to 0.5% of the total pore count, while those between 80 μm and 100 μm are capped at 0.1%. Additionally, it is designed to minimize squealing noises, making it suitable for electric motor applications, including window regulator motors.
Career Highlights
Nishizawa's professional journey includes valuable experience at notable companies such as Hitachi Chemical Company, Ltd. and Hitachi Powdered Metals Co., Ltd. His work at these firms has solidified his reputation in the industry and allowed him to refine his skills in materials and product design.
Collaborations
Throughout his career, Nishizawa has worked alongside esteemed colleagues, including Hidekazu Tokushima and Hideaki Kawata. These collaborations have enriched his work, leading to innovations that solve real-world problems in bearing applications.
Conclusion
Naoki Nishizawa stands out as a notable inventor whose contributions to the field of sintered bearings reflect a commitment to innovation and engineering excellence. His work not only showcases technical proficiency but also a forward-thinking approach to improving the usability and longevity of mechanical components. With two patents in his portfolio, he continues to shape the future of bearing technology through inventive solutions.