Patents by Inventor Tadayoshi Noguchi

Tadayoshi Noguchi 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).

  • Actuator using piezoelectric element and head-positioning mechanism using the actuator
    Patent number: 6538854
    Abstract: An actuator includes a shear-type piezoelectric element of predetermined thickness and an opposed electrode formed on two electrodes in spaced relationship on a base member. The opposed electrode is displaced in accordance with the direction of polarization of the shear-type piezoelectric element upon applying a voltage between the two electrodes. The opposed electrode thus constitutes an operating section of the actuator. The actuator can be incorporated as a part of the head actuator to constitute a head-positioning mechanism capable of displacing the head by a minuscule distance independently of the operation of the head actuator.
    Type: Grant
    Filed: June 1, 2001
    Date of Patent: March 25, 2003
    Assignee: Fujitsu Limited
    Inventors: Shinji Koganezawa, Tomoyoshi Yamada, Yukihiro Uematsu, Tadayoshi Noguchi, Hisashi Nakano, Ryuma Sakamoto, Junichi Inoue, Tetsuya Suzuki
  • Actuator using piezoelectric element and head-positioning mechanism using the actuator
    Patent number: 6327120
    Abstract: An actuator having a simple configuration requiring no high dimensional accuracy, high in positioning accuracy and low in cost, and a head-positioning mechanism using the actuator are disclosed. An actuator according to a first application comprises a shear-type piezoelectric element of predetermined thickness and an opposed electrode formed on two electrodes in spaced relationship on a base member. The opposed electrode is displaced in accordance with the direction of polarization of the shear-type piezoelectric element upon applying a voltage between the two electrodes. The opposed electrode thus constitutes an operating section of the actuator. An actuator according to a second application comprises a movable member arranged on a drive member including a shear-type piezoelectric element on a base member. The drive member includes a plurality of layers of piezoelectric elements polarized in alternately opposite directions perpendicular to the thickness of the devices.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: December 4, 2001
    Assignees: Fujitsu Limited, FDX Corporation
    Inventors: Shinji Koganezawa, Toru Kohei, Tomoyoshi Yamada, Yukihiro Uematsu, Tadayoshi Noguchi, Hisashi Nakano, Ryuma Sakamoto, Junichi Inoue, Tetsuya Suzuki
  • Actuator using piezoelectric element and head-positioning mechanism using the actuator
    Publication number: 20010038515
    Abstract: An actuator having a simple configuration requiring no high dimensional accuracy, high in positioning accuracy and low in cost, and a head-positioning mechanism using the actuator are disclosed. An actuator according to a first application comprises a shear-type piezoelectric element of predetermined thickness and an opposed electrode formed on two electrodes in spaced relationship on a base member. The opposed electrode is displaced in accordance with the direction of polarization of the shear-type piezoelectric element upon applying a voltage between the two electrodes. The opposed electrode thus constitutes an operating section of the actuator. An actuator according to a second application comprises a movable member arranged on a drive member including a shear-type piezoelectric element on a base member. The drive member includes a plurality of layers of piezoelectric elements polarized in alternately opposite directions perpendicular to the thickness of the devices.
    Type: Application
    Filed: June 1, 2001
    Publication date: November 8, 2001
    Applicant: Fujitsu Limited
    Inventors: Shinji Koganezawa, Tomoyoshi Yamada, Yukihiro Uematsu, Tadayoshi Noguchi, Hisashi Nakano, Ryuma Sakamoto, Junichi Inoue, Tetsuya Suzuki