Patents by Inventor Naoaki Kanada

Naoaki Kanada 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).

  • Publication number: 20170248993
    Abstract: Described herein is a hard disk drive that includes a base and a cover. The base includes a closed end, sidewalls, an open end, and one or more corner portions. The sidewalls extend from the closed end, and the open end is defined by the sidewalls. The closed end, sidewalls, and open end define an interior cavity of the hard disk drive. Each corner portion is proximate a respective intersection of the sidewalls and positioned exteriorly of the interior cavity. The cover is welded to the sidewalls over the open end by a weld bead such that the weld bead is positioned between the interior cavity and the corner portions. The weld bead hermetically seals the cover to the base. Furthermore, at least one of the corner portions is at least substantially flush with the cover.
    Type: Application
    Filed: February 25, 2016
    Publication date: August 31, 2017
    Inventors: Jiro Kaneko, Gantaro Nakamura, Koichi Suzuki, Naoshi Mizumoto, Naoaki Kanada, Mutsuro Ohta, Takeji Sumiya
  • Patent number: 9747956
    Abstract: Described herein is a hard disk drive that includes a base and a cover. The base includes a closed end, sidewalls, an open end, and one or more corner portions. The sidewalls extend from the closed end, and the open end is defined by the sidewalls. The closed end, sidewalls, and open end define an interior cavity of the hard disk drive. Each corner portion is proximate a respective intersection of the sidewalls and positioned exteriorly of the interior cavity. The cover is welded to the sidewalls over the open end by a weld bead such that the weld bead is positioned between the interior cavity and the corner portions. The weld bead hermetically seals the cover to the base. Furthermore, at least one of the corner portions is at least substantially flush with the cover.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: August 29, 2017
    Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
    Inventors: Jiro Kaneko, Gantaro Nakamura, Koichi Suzuki, Naoshi Mizumoto, Naoaki Kanada, Mutsuro Ohta, Takeji Sumiya
  • Patent number: 9672870
    Abstract: An electrical feed-through, such as a PCB connector, involves a connector part that includes a housing from which first and second positioning flanges extend from opposing ends. A data storage device includes an enclosure base with which the electrical feed-through is coupled, where the base comprises an annular recessed surface surrounding an aperture that is encompassed by the electrical feed-through, and first and second recessed positioning surfaces extending in directions outward from respective longitudinal ends of the annular recessed surface, where each of the recessed positioning surfaces has a corresponding wall extending vertically therefrom. When assembled, each positioning flange of the electrical feed-through mechanically mates with a corresponding recessed positioning surface of the base, such that the position of the electrical feed-through is constrained by the walls of each recessed positioning surface.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: June 6, 2017
    Assignee: Western Digital Technologies, Inc.
    Inventors: Naoshi Mizumoto, Naoaki Kanada, Mutsuro Ohta, Gentaro Nakamura
  • Publication number: 20130155547
    Abstract: A damping material to increase a damping ratio is disclosed. In one embodiment, an actuator arm assembly of a hard-disk drive (HDD) comprises an actuator arm. A viscoelastic layer is coupled with the actuator arm. A constraining layer is coupled with the viscoelastic layer on a side of the viscoelastic layer opposite the actuator arm. The coupling of the actuator arm, the viscoelastic layer, and the constraining layer occurs over an area which is a fraction of the area between the constraining layer and the actuator arm.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Inventors: Hajime Eguchi, Naoaki Kanada
  • Patent number: 7576945
    Abstract: Turbulence of an airflow returning to a magnetic disk along the base sidewall of a HDD is reduced to thereby reduce flutter of an actuator or a magnetic disk caused by the airflow, thus improving read/write performance. An HDD according to an embodiment of the present invention comprises a base, a top cover fixed to the base, a motor for rotating a magnetic disk, an actuator for moving a head which gets access to the magnetic disk, a ramp slope portion on which an extreme end is ridden up, a ramp support portion for supporting the ramp slope portion, and a stage for holding the ramp support portion. A flow passage is formed which runs toward the magnetic disk through an area near the ramp support portion on the side of the top cover. An inclined portion running toward the bottom of the base is formed on the end of the flow passage on the side of the magnetic disk.
    Type: Grant
    Filed: December 14, 2005
    Date of Patent: August 18, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Naoaki Kanada, Kohichi Takeuchi
  • Patent number: 7468868
    Abstract: A rebounding phenomenon of an actuator assembly is to be prevented and device assembling work and maintenance work are to be carried out separately from stopper removing work. In one embodiment, a magnetic disk device includes a stopper 50 for restricting a turning range of an actuator assembly 8 having a coil support 22 in a magnetic disk device. In the stopper 50, rubber 51 is cantilevered by a support rod 261 so as to undergo a moment of force and fulfill a shock absorbing function in order to restrict an excessive movement of the actuator assembly 8 to an inner or an outer side when the rubber 51 is abutted against a first arm 22a or a second arm 22b of a bifurcated shape of the coil support 22, the support rod 261 is disposed outside a turning track of turning ends of the first and second arms 22a, 22b of the coil support 22, and a permanent magnet 52 is embedded in the rubber 51 to attract the first and second arms 22a, 22b.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: December 23, 2008
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Takao Suzuki, Kohichi Takeuchi, Naoaki Kanada, Ichiro Koyanagi
  • Patent number: 7242555
    Abstract: The invention prevents the deterioration of the read/write performance of a hard disk drive due to the interference between an inertial latching mechanism and an actuator when a head slider holding a magnetic head is located at a read/write position. A latching arm 22 provided with a projection 23 and included in an inertial latching mechanism 20, and a part 161 of a coil holding arm 16a included in an actuator are formed in shapes such that the latching arm 22 provided with the projection 23 does not interfere with the coil holding arm 16a having the part 161 when a head slider mounted on the actuator is located at a read/write position on a magnetic disk.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: July 10, 2007
    Assignee: Hitachi Global Storage Technologies Netherlands BV
    Inventors: Naoaki Kanada, Kazuyoshi Yoshida, Keiichiroh Yoshida, Toshihiko Yuhhi
  • Patent number: 7085107
    Abstract: The invention prevents the deterioration of the read/write performance of a hard disk drive due to the interference between an inertial latching mechanism and an actuator when a head slider holding a magnetic head is located at a read/write position. A latching arm 22 provided with a projection 23 and included in an inertial latching mechanism 20, and a part 161 of a coil holding arm 16a included in an actuator are formed in shapes such that the latching arm 22 provided with the projection 23 does not interfere with the coil holding arm 16a having the part 161 when a head slider mounted on the actuator is located at a read/write position on a magnetic disk.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: August 1, 2006
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Naoaki Kanada, Kohji Takahashi, Kazuyoshi Yoshida, Keiichiroh Yoshida
  • Publication number: 20060139796
    Abstract: Turbulence of an airflow returning to a magnetic disk along the base sidewall of a HDD is reduced to thereby reduce flutter of an actuator or a magnetic disk caused by the airflow, thus improving read/write performance. An HDD according to an embodiment of the present invention comprises a base, a top cover fixed to the base, a motor for rotating a magnetic disk, an actuator for moving a head which gets access to the magnetic disk, a ramp slope portion on which an extreme end is ridden up, a ramp support portion for supporting the ramp slope portion, and a stage for holding the ramp support portion. A flow passage is formed which runs toward the magnetic disk through an area near the ramp support portion on the side of the top cover. An inclined portion running toward the bottom of the base is formed on the end of the flow passage on the side of the magnetic disk.
    Type: Application
    Filed: December 14, 2005
    Publication date: June 29, 2006
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Naoaki Kanada, Kohichi Takeuchi
  • Patent number: 6940699
    Abstract: In a hard disk drive, there are provided a head assembly 13 that drives a magnetic head 33 that reads and writes data on a recording disk, and a flange section that extends toward the periphery on the sleeve 21 of a pivot member 20 that supports this head assembly 13 so that it is free to pivot; and planar sections 41A and 41B are formed on the peripheral surface of this flange section in order to adjust the balance of the center of gravity of the head assembly 13.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: September 6, 2005
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Toshihiko Yuki, Hitoshi Tsujino, Jun Ishikawa, Naoaki Kanada
  • Publication number: 20040240120
    Abstract: A rebounding phenomenon of an actuator assembly is to be prevented and device assembling work and maintenance work are to be carried out separately from stopper removing work. In one embodiment, a magnetic disk device includes a stopper 50 for restricting a turning range of an actuator assembly 8 having a coil support 22 in a magnetic disk device. In the stopper 50, rubber 51 is cantilevered by a support rod 261 so as to undergo a moment of force and fulfill a shock absorbing function in order to restrict an excessive movement of the actuator assembly 8 to an inner or an outer side when the rubber 51 is abutted against a first arm 22a or a second arm 22b of a bifurcated shape of the coil support 22, the support rod 261 is disposed outside a turning track of turning ends of the first and second arms 22a, 22b of the coil support 22, and a permanent magnet 52 is embedded in the rubber 51 to attract the first and second arms 22a, 22b.
    Type: Application
    Filed: April 9, 2004
    Publication date: December 2, 2004
    Applicant: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Takao Suzuki, Kohichi Takeuchi, Naoaki Kanada, Ichiro Koyanagi
  • Publication number: 20040145832
    Abstract: The invention prevents the deterioration of the read/write performance of a hard disk drive due to the interference between an inertial latching mechanism and an actuator when a head slider holding a magnetic head is located at a read/write position. A latching arm 22 provided with a projection 23 and included in an inertial latching mechanism 20, and a part 161 of a coil holding arm 16a included in an actuator are formed in shapes such that the latching arm 22 provided with the projection 23 does not interfere with the coil holding arm 16a having the part 161 when a head slider mounted on the actuator is located at a read/write position on a magnetic disk.
    Type: Application
    Filed: November 25, 2003
    Publication date: July 29, 2004
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Naoaki Kanada, Kohji Takahashi, Kazuyoshi Yoshida, Keiichiroh Yoshida
  • Publication number: 20040145831
    Abstract: The invention prevents the deterioration of the read/write performance of a hard disk drive due to the interference between an inertial latching mechanism and an actuator when a head slider holding a magnetic head is located at a read/write position. A latching arm 22 provided with a projection 23 and included in an inertial latching mechanism 20, and a part 161 of a coil holding arm 16a included in an actuator are formed in shapes such that the latching arm 22 provided with the projection 23 does not interfere with the coil holding arm 16a having the part 161 when a head slider mounted on the actuator is located at a read/write position on a magnetic disk.
    Type: Application
    Filed: November 25, 2003
    Publication date: July 29, 2004
    Applicant: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Naoaki Kanada, Kazuyoshi Yoshida, Keiichiroh Yoshida, Toshihiko Yuhki
  • Patent number: 6480362
    Abstract: A flexible cable assembly (FCA) has a flexible cable, first and second brackets attached to the flexible cable, and a band for holding the first and second brackets while the flexible cable is folded back and the first and second brackets overlap. The band is detachably mounted to the first and second brackets to facilitate efficient manufacturing and disassembly methods. The FCA may be implemented at various manufacturing stages including the head suspension assembly (HSA) or the entire hard disk drive (HDD) assembly.
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: November 12, 2002
    Assignee: International Business Machines Corporation
    Inventors: Keiichiroh Yoshida, Naoaki Kanada, Jun Ishikawa, Hitoshi Tsujino
  • Publication number: 20020114109
    Abstract: In a hard disk drive, there are provided a head assembly 13 that drives a magnetic head 33 that reads and writes data on a recording disk, and a flange section that extends toward the periphery on the sleeve 21 of a pivot member 20 that supports this head assembly 13 so that it is free to pivot; and planar sections 41A and 41B are formed on the peripheral surface of this flange section in order to adjust the balance of the center of gravity of the head assembly 13.
    Type: Application
    Filed: January 31, 2002
    Publication date: August 22, 2002
    Applicant: International Business Machines Corporation
    Inventors: Toshihiko Yuki, Hitoshi Tsujino, Jun Ishikawa, Naoaki Kanada