Location History:
- Hyogo, JP (1996 - 1997)
- Itami, JP (2001 - 2008)
Company Filing History:
Years Active: 1996-2008
Title: **Inventor Makoto Otsuki: Innovating Hydrodynamic Technology**
Introduction
Makoto Otsuki is a distinguished inventor based in Itami, Japan. With an impressive portfolio of 15 patents, he has made significant contributions to the field of hydrodynamic engineering. His innovative designs enhance performance and reliability in various applications, particularly in the realm of spindle motors and bearings.
Latest Patents
Among Otsuki's noteworthy inventions are two recent patents related to hydrodynamic bearing assemblies. The first patent introduces a hydrodynamic bearing assembly that achieves high rotation rates while maintaining exceptional rigidity. This assembly features a total radial gap of 3 microns or less, which prevents contact with the thrust bearing. The thrust bearing, a pump-out type, is designed with offset grooves on its surface, allowing for optimal fluid flow to enhance performance. A depth ratio of the grooves relative to the shaft diameter is preferably 0.005 or less to ensure that translational rigidity is preserved.
The second patent builds upon this innovation, detailing a hydrodynamic bearing assembly paired with a spindle motor. This assembly continues to emphasize high rotation rates and robust rigidity. Similar to the first invention, it incorporates precise engineering to prevent contact in the thrust bearing and includes features that eliminate half-whirl phenomena. The design is carefully crafted, allowing the radial gap to smoothly enlarge along the axis, thereby ensuring stability in rotation.
Career Highlights
Makoto Otsuki is currently employed at Sumitomo Electric Industries, Limited, where he applies his expertise in hydrodynamic technologies. His career has been marked by a commitment to innovation and excellence in engineering design, positioning him as a key contributor to his field.
Collaborations
Throughout his career, Otsuki has collaborated with notable colleagues, including Kaoru Murabe and Osamu Komura. Together, they have advanced the technology surrounding hydrodynamic bearings and motors, further driving innovation within the industry.
Conclusion
Makoto Otsuki's contributions to hydrodynamic bearing technology underscore his status as a leading inventor. With a focus on precision engineering and stability, his patents reflect a deeper understanding of the complex mechanisms that drive modern machinery. As advancements continue in this field, Otsuki's work will undoubtedly inspire future innovations.