Patents by Inventor Sinji Hiraoka

Sinji Hiraoka 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 spring arm assembly including structure for preventing damage to a conductive layer resulting from bending
    Patent number: 5612840
    Abstract: A magnetic head unit is provided by which damage to a conductive-pattern layer formed on a spring arm during a bending process of the spring arm can be prevented. The magnetic head unit comprises a magnetic head and a spring arm having a bent portion which is bent to generate an elastic force. The magnetic head is mounted on an end of the spring arm. At least one conductive-pattern layer is formed on a surface of the spring arm to extend from a gimbal portion where the magnetic head is mounted to a attachment portion where the spring arm is mounted to a member of a magnetic head driving mechanism. The bent portion has a first portion and a second portion separated from the first portion. The conductive-pattern layer passes through the second portion. No external force is applied to the conductive-pattern layer formed during a bending process for the bent portion.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: March 18, 1997
    Assignee: Fujitsu Limited
    Inventors: Sinji Hiraoka, Yoshihisa Matsumoto, Isamu Itoh, Shigeo Terashima