Patents by Inventor Michio Ueha

Michio Ueha has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Managing resonance frequency of hard disk drive voice coil motor
    Patent number: 8958179
    Abstract: Approaches to reducing the natural frequency of a voice coil motor (VCM) in a hard disk drive include configuring one or both of the yokes with at least one mating structure that comprises a step feature that partitions the mating structure into a contact surface and a recessed surface, where the contact surface is toward the outer area of the mating structure and contacts a corresponding mating structure of the other yoke and the recessed surface is toward the inner area of the mating structure and does not contact with the corresponding mating structure of the other yoke. Consequently, the distance between the fixed points is increased, which reduces the natural frequency and thus the resonance of the VCM assembly.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: February 17, 2015
    Assignee: HGST Netherlands B.V.
    Inventors: Michio Ueha, Takeshi Saito, Kohji Takahashi, Hiroki Kitahori