Company Filing History:
Years Active: 2024-2025
Title: Hideo Fujiura - Innovator in Fluid Dynamic Pressure Bearings
Introduction
Hideo Fujiura is an inventor based in Saku-shi, Japan. He is known for his innovative work in the field of fluid dynamic pressure bearings and spindle motors. Although he currently holds no granted patents, his contributions to the industry are noteworthy.
Latest Patent Applications
Fujiura's latest patent applications include several advancements in fluid dynamic pressure bearings and spindle motors. One application focuses on a long-life spindle motor that excels in startup characteristics in low-temperature environments, such as 0° C. This design aims to prevent startup problems caused by the evaporation or deterioration of lubricating oil in high-temperature conditions. The spindle motor features a fluid dynamic bearing filled with a specialized lubricating oil, which contains a methyl pentanediol diester derived from 3-methyl-1,5-pentanediol and n-decanoic acid, with a specific molar ratio and low water content.
Another application details a fluid dynamic pressure bearing apparatus that includes a shaft and a bearing sleeve, with lubricating oil filling the space between them. This design incorporates a copper alloy containing lead and utilizes a base oil selected from various ester types. The lubricating oil is formulated to suppress hydrolysis and reduce wear on both the shaft and the bearing sleeve.
Conclusion
Hideo Fujiura's innovative approaches to fluid dynamic pressure bearings and spindle motors demonstrate his commitment to enhancing performance in challenging environments. His latest patent applications reflect a deep understanding of material science and engineering principles.