Yukinori Maruyama

Title: Yukinori Maruyama: Spindle Motor Innovation

Introduction

Yukinori Maruyama is an inventor associated with Panasonic Corporation and located in Ehime, Japan. His patent work includes a spindle motor design intended to improve bearing performance in disk-shaped medium recording and reproducing devices.

Latest Patents

Maruyama is credited with 1 patent: “Spindle Motor and Disk-Shaped Medium Recording and Producing Device.” The invention describes a spindle motor designed to reduce noise during swinging, extend service life, and limit increases in current consumption. It specifies that the thrust hydrodynamic groove’s outside diameter is at least 10% of the disk-shaped medium’s outside diameter, while the radial hydrodynamic groove is deeper than the thrust hydrodynamic groove. These design parameters increase angular stiffness in the thrust bearing, helping suppress wear and noise from metal contact when disturbance torque is applied.

Career Highlights

Maruyama’s listed patent reflects work on spindle motor and hydrodynamic bearing design. The invention focuses on balancing operational stability, durability, and power consumption in disk-related equipment.

Collaborations

Maruyama’s listed coworker is Masafumi Kumoi. The available information identifies both inventors in connection with the patent but does not specify their individual contributions.

Conclusion

Yukinori Maruyama’s patent addresses bearing stability in spindle motors, with design features intended to reduce noise and wear while supporting longer service life and controlled current consumption.