Patents by Inventor Kiyotaka Fukuoka

Kiyotaka Fukuoka 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).

  • Head clamping apparatus for magnetic disk tester and magnetic disk tester
    Patent number: 6930850
    Abstract: A magnetic disk tester has a head clamp (35, 218) to position a magnetic head (15, 289). The head clamp has a micromotion stage (55, 273) provided with a stage (59, 205) which is horizontally moved by a piezo-element (77). The magnetic head is attached to the piezo-stage (55, 273). On the head clamp (218), a reflective scale (222) is attached to a back face of the piezo-stage, and a laser head (217) is oriented toward the head clamp (218). According to a reflected laser beam from the reflective scale, the position of the magnetic head (289) is detected. An error signal indicating the difference between the detected position and a reference position is used to control the head clamp (218). The piezo-element can operate at high frequencies, to easily make the magnetic head trace a target track and improve the positioning accuracy of the magnetic head.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: August 16, 2005
    Assignee: Kyodo Denshi System Co., Ltd.
    Inventors: Hitoshi Takagi, Kiyotaka Fukuoka, Mamoru Hatano, Katsuhiro Fujii
  • Head clamping apparatus for magnetic disk tester and magnetic disk tester
    Publication number: 20020057517
    Abstract: A magnetic disk tester has a head clamp (35, 218) to position a magnetic head (15, 289). The head clamp has a micromotion stage (55, 273) provided with a stage (59, 205) which is horizontally moved by a piezo-element (77). The magnetic head is attached to the piezo-stage (55, 273).
    Type: Application
    Filed: November 13, 2001
    Publication date: May 16, 2002
    Inventors: Hitoshi Takagi, Kiyotaka Fukuoka, Mamoru Hatano, Katsuhiro Fujii