Patents by Inventor Kenjiro Kai

Kenjiro Kai 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 arm with magnetic flux response to bias arm to a stop position
    Patent number: 5801904
    Abstract: A magnetic disk apparatus wherein a magnetic member mounted on a bobbin made of a non-magnetic material is disposed at a specific position effective for the full range of movement of a transducer head such that the magnetic member and thus the head is attracted by the leakage flux in a VCM, and the attracting force thus derived has a component that produces a rotation moment in only one direction around the pivot axis of the head to bias the head toward a non-data portion of a data storage disk.
    Type: Grant
    Filed: May 2, 1996
    Date of Patent: September 1, 1998
    Assignee: Hitachi Ltd.
    Inventors: Yoshihiko Kinoshita, Hiroshi Nishida, Tatsuya Ishigaki, Kenjiro Kai, Atsushi Ito
  • Actuator arm with magnetic flux response to bias arm to a stop position
    Patent number: 5541792
    Abstract: A magnetic disk apparatus wherein a magnetic member mounted on a bobbin made of a non-magnetic material is disposed at a specific position effective for the full range of movement of a transducer head such that the magnetic member and thus the head is attracted by the leakage flux in a VCM, and the attracting force thus derived has a component that produces a rotation moment in only one direction around the pivot axis of the head to bias the head toward a non-data portion of a data storage disk.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: July 30, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihiko Kinoshita, Niroshi Nishida, Tatsuya Ishigaki, Kenjiro Kai, Atsushi Ito
  • Vibration absorbing structure for a magnetic disk apparatus
    Patent number: 5469311
    Abstract: A magnetic disk apparatus includes a base coupled to a supporting frame by means of a damping member so that the vibration caused by the operation of the internal actuator subsides. The damping member may include an adhesive resilient material disposed between the base and the supporting frame.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: November 21, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Nishida, Kazuo Nakagoshi, Kenjiro Kai, Katsumoto Onoyama