Patents by Inventor Toshiharu Nishioka

Toshiharu Nishioka 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).

  • Plural disc arrangement and cooling system therefore
    Patent number: 5041931
    Abstract: A rotating disc device for storing digital data, comprising: a storage unit containing a spindle motor, a disc for storing digital data thereon and rotating by being driven by the spindle motor, a head for writing and reading data on the disc, and a positioning mechanism for positioning the head; a driver circuit for driving the spindle motor and the positioning mechanism; and a control circuit for controlling the storage unit. A first power supply unit for supplying electric power to the driver circuit, is positioned adjacent to the driver circuit; and a second power supply unit for supplying electric power to the control circuit, is positioned adjacent to the control circuit. Further, a first cooling fan is provided for cooling the first power supply unit, the storage unit, and the driver circuit; and a second cooling fan is provided for cooling the second power supply unit and the control circuit.
    Type: Grant
    Filed: August 30, 1989
    Date of Patent: August 20, 1991
    Assignee: Fujitsu Limited
    Inventors: Hiroshi Uno, Takao Hakamatani, Toshiharu Nishioka