Patents by Inventor Koosaku Wakatsuki

Koosaku Wakatsuki 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).

  • Magnetic disk device having an auto-loading mechanism and a dust collecting mechanism
    Patent number: 5136438
    Abstract: A magnetic head device has a magnetic head slider by means of which information is recorded in and read from a magnetic recording medium. The magnetic head slider is supported by a supporting structure having an internal cavity, an opening formed in a portion of the structure where the magnetic head slider faces the magnetic recording medium and communicating with the internal cavity, and a gas passage through which the gas introduced into the internal cavity through the opening is discharged to the exterior of the internal cavity. With this arrangement, the pressure acting on the back surface of the magnetic head slider is adjusted to keep the slider afloat, while removing dust suspended in the gas around the recording medium and the supporting structure.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: August 4, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Koosaku Wakatsuki, Shoji Suzuki, Noriaki Okamoto, Yuzo Yamaguchi, Katsuaki Kikuchi, Mikio Tokuyama, Yoshinori Takeuchi, Yoshihiko Miyake