Kazuo Ota

Title: Kazuo Ota - Innovator in Fluid Dynamic Bearing Technology

Introduction

Kazuo Ota is a prominent inventor based in Komoro, Japan. He has made significant contributions to the field of fluid dynamic bearing technology, holding 2 patents that showcase his innovative approach to engineering.

Latest Patents

Ota's latest patents include a fluid dynamic bearing device, a spindle motor, and a hard disk drive device. The fluid dynamic bearing device is designed to prevent an oleophobic agent from wetting and spreading to a tapered seal portion. This device includes lubricating oil C, which is separated by a separator portion that holds a gas layer between two conical bearing members. The design features two primary tapered seal portions that connect to both ends along the axial direction of the separator portion. The width in the radial direction of these tapered seal portions decreases as they approach the conical bearing members. The gas-liquid interface of the lubricating oil C is located at each of the two primary tapered seal portions, with an oleophobic agent blocking portion arranged at both ends in the axial direction of the separator portion. Additionally, a separator central portion is positioned between the oleophobic agent blocking portions, and an oleophobic coating is formed at least at the separator central portion of the separator portion.

The spindle motor patent describes a fluid dynamic pressure bearing that includes a conical bearing member with a conical bearing surface. This design forms a first gap between the member constituting the rotor. A second gap, connected to one end of the first gap, is provided over the entire periphery of the shaft. A tapered seal portion is formed between the conical bearing member and the rotor. The conical bearing member is equipped with a circulation hole that communicates the second gap and the tapered seal portion, ensuring efficient operation.

Career Highlights

Kazuo Ota is currently employed at Minebea Mitsumi Inc., where he continues to develop innovative technologies in the field of bearings and motors. His work has significantly advanced the understanding and application of fluid dynamics in mechanical systems.

Collaborations

Ota has collaborated with notable colleagues, including Daigo Nakajima and Hideaki Showa, contributing to various projects that enhance the performance and reliability of mechanical devices.

Conclusion

Kazuo Ota's contributions to fluid dynamic bearing technology exemplify his innovative spirit and dedication to engineering excellence. His