Location History:
- Funabaski, JP (2001)
- Tokyo-to, JP (2002)
Company Filing History:
Years Active: 2001-2002
Title: Innovative Contributions of Akihiro Ohyama
Introduction
Akihiro Ohyama is a notable inventor based in Tokyo-to, Japan, with a commendable record of two patents to his name. His contributions significantly impact the technological landscape, particularly in the realm of spindle motors and hard disk drives.
Latest Patents
Ohyama's latest patents include a novel spindle motor structure utilizing ceramic ball bearings specifically for hard disk drives. This innovative bearing mechanism features two bearings positioned separately along the axial direction, each comprising inner and outer races along with balls. Unique to this design is the differing coefficient of linear expansion between the balls and the inner and outer races. By shifting the inner and outer races axially, pre-loaded pressures are established, allowing for temperature-induced adjustments through a compensating member that alters the distance between the outer races differently than that of the inner races.
His second patent revolves around a spindle motor startup method and apparatus that addresses startup malfunctions commonly seen in spindle motors. This innovation focuses on breaking the torque balance between the stator and rotor to streamline motor startup time. The processes include gradual adjustments of commutation frequency and manipulation of drive current, ensuring efficient operation of the motors, particularly in systems with specific torque requirements.
Career Highlights
Currently, Akihiro Ohyama is employed by International Business Machines Corporation (IBM), where he continues to develop and refine cutting-edge technologies. His work directly contributes to advancements in data storage solutions, enhancing both efficiency and reliability in hard disk drives.
Collaborations
Throughout his career, Ohyama has collaborated with esteemed colleagues such as Yasuhito Shimizu and Naoyuki Kagami. Their joint efforts exemplify the collaborative spirit of innovation that drives progress within the technology sector.
Conclusion
In summary, Akihiro Ohyama stands out as a distinguished inventor whose patents contribute significantly to the advancement of spindle motor technologies. His innovative spirit and collaborative efforts with others in the field underline the importance of teamwork in driving technological progress. His work not only enhances the efficiency of hard disk drives but also paves the way for future innovations within the industry.