Seiji Maruoka

Title: Seiji Maruoka: Innovator in Motor Technology

Introduction

Seiji Maruoka is a distinguished inventor based in Kyoto, Japan. He has made significant contributions to the field of motor technology, holding a total of 3 patents. His innovative designs focus on enhancing the efficiency and functionality of motors.

Latest Patents

Maruoka's latest patents include a motor featuring screws with differing pitch and screw-receiving groove portions with differing axial lengths. This design incorporates a rotating portion that consists of a hollow shaft extending along a central axis. The hollow shaft contains a through hole that passes through it in an axial direction. The rotating portion is equipped with an upper screw that closes an upper opening at the upper end of the through hole, and a lower screw that closes a lower opening at the lower end. The hollow shaft also includes an upper groove portion for the upper screw and a lower groove portion for the lower screw, with the lower groove being shorter in axial length than the upper groove. Additionally, the lower screw has a smaller axial pitch than the upper screw.

Another notable patent is for a spindle motor and disk drive apparatus. This spindle motor features a fixing portion defined by a bearing portion and a holder portion, with an adhesive arranged in the gap between them. The fixing portion includes protruding surfaces that extend radially from the bearing and holder portions, along with boundary surfaces that connect these protruding surfaces. The design ensures that at least a portion of the first boundary surface is positioned above the second boundary surface, enhancing the motor's stability and performance.

Career Highlights

Seiji Maruoka is currently employed at Nidec Corporation, a leading company in the motor manufacturing industry. His work at Nidec has allowed him to focus on developing advanced motor technologies that cater to various applications.

Collaborations

Maruoka has collaborated with notable coworkers, including Mitsuhiro Takemoto and Hironori Ando. Their combined expertise has contributed to the successful development of innovative motor solutions.

Conclusion

Seiji Maruoka's contributions to motor technology through his patents and work at Nidec Corporation highlight his role as a key innovator in the field. His designs not only improve motor efficiency but also pave the way for future advancements in technology.