Patents by Inventor Gentaro Nakamura
Gentaro Nakamura 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).
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Patent number: 9672870Abstract: 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: GrantFiled: September 30, 2016Date of Patent: June 6, 2017Assignee: Western Digital Technologies, Inc.Inventors: Naoshi Mizumoto, Naoaki Kanada, Mutsuro Ohta, Gentaro Nakamura
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Patent number: 8130472Abstract: Embodiments of the present invention provide a magnetic disk device that can reduce an external force applied to the carriage. According to one embodiment, in a magnetic disk device, a bracket inserted between a carriage and a base is supported toward the base side by support portions owned by the bracket and by a band with a space provided between the bracket and the opposed side of the carriage (such as a top surface of the mounting stand). This configuration cannot apply an external force in the rotation direction to the carriage from the bracket even when the bracket is thermally expanded due to heat generated from a head amplifier or the like mounted on a flexible substrate.Type: GrantFiled: November 30, 2007Date of Patent: March 6, 2012Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Hirokazu Tanizawa, Osamu Beppu, Gentaro Nakamura, Takahisa Okada
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Patent number: 8081442Abstract: A removable data-storage device. The removable data-storage device includes a main data-storage unit, an exterior housing for containing the main data-storage unit, an elastic shock-reduction part between an inner wall of the exterior housing and the main data-storage unit for reducing a mechanical shock to the main data-storage unit by elasticity and an external connector exposed from an opening of the exterior housing. The main data-storage unit is placed at the rear of the external connector as viewed from the opening. The external connector is joined and secured to the main data-storage unit and the exterior housing. In addition, the elastic shock-reduction part is configured to deform with a movement of the main data-storage unit in the exterior housing produced by a mechanical shock and a movable range of the external connector is smaller than a movable range of the main data-storage unit.Type: GrantFiled: May 29, 2009Date of Patent: December 20, 2011Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Gentaro Nakamura, Hirokazu Tanizawa, Tadaaki Tomikawa, Tetsuo Yuki
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Publication number: 20110069444Abstract: A removable data-storage device. The removable data-storage device includes a main data-storage unit, an exterior housing for containing the main data-storage unit, an elastic shock-reduction part between an inner wall of the exterior housing and the main data-storage unit for reducing a mechanical shock to the main data-storage unit by elasticity and an external connector exposed from an opening of the exterior housing. The main data-storage unit is placed at the rear of the external connector as viewed from the opening. The external connector is joined and secured to the main data-storage unit and the exterior housing. In addition, the elastic shock-reduction part is configured to deform with a movement of the main data-storage unit in the exterior housing produced by a mechanical shock and a movable range of the external connector is smaller than a movable range of the main data-storage unit.Type: ApplicationFiled: May 29, 2009Publication date: March 24, 2011Inventors: Gentaro Nakamura, Hirokazu Tanizawa, Tadaaki Tomikawa, Tetsuo Yuki
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Patent number: 7545607Abstract: A carriage includes a slider on which a magnetic head for reading/writing information from/to a disk is mounted, a suspension for carrying the slider and for applying a predetermined load to the slider, a carriage arm to which the suspension is attached, and a body section to which the carriage arm is connected. The carriage arm includes a suspension fixing portion, as arm arranged substantially in parallel with a disk surface, and a restricting member which is a thin-plate-like member having a surface which is opposite to the plane of arm which is parallel to the disk surface. The restricting member and the arm are coupled via a viscoelastic body.Type: GrantFiled: September 7, 2006Date of Patent: June 9, 2009Assignee: Hitachi Global Storage Technologies Japan, Ltd.Inventors: Toshihiko Shimizu, Tetsuya Hamaguchi, Toshihiro Arisaka, Hiromitsu Masuda, Gentaro Nakamura, Takenori Atsumi
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Publication number: 20080151429Abstract: Embodiments of the present invention provide a magnetic disk device that can reduce an external force applied to the carriage. According to one embodiment, in a magnetic disk device, a bracket inserted between a carriage and a base is supported toward the base side by support portions owned by the bracket and by a band with a space provided between the bracket and the opposed side of the carriage (such as a top surface of the mounting stand). This configuration cannot apply an external force in the rotation direction to the carriage from the bracket even when the bracket is thermally expanded due to heat generated from a head amplifier or the like mounted on a flexible substrate.Type: ApplicationFiled: November 30, 2007Publication date: June 26, 2008Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Hirokazu Tanizawa, Osamu Beppu, Gentaro Nakamura, Takahisa Okada
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Publication number: 20070002497Abstract: A carriage includes a slider on which a magnetic head for reading/writing information from/to a disk is mounted, a suspension for carrying the slider and for applying a predetermined load to the slider, a carriage arm to which the suspension is attached, and a body section to which the carriage arm is connected. The carriage arm includes a suspension fixing portion, as arm arranged substantially in parallel with a disk surface, and a restricting member which is a thin-plate-like member having a surface which is opposite to the plane of arm which is parallel to the disk surface. The restricting member and the arm are coupled via a viscoelastic body.Type: ApplicationFiled: September 7, 2006Publication date: January 4, 2007Inventors: Toshihiko Shimizu, Tetsuya Hamaguchi, Toshihiro Arisaka, Hiromitsu Masuda, Gentaro Nakamura, Takenori Atsumi
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Patent number: 7110223Abstract: A carriage for a magnetic disk apparatus includes a slider on which a magnetic head for reading/writing information from/to a disk is mounted, a suspension for carrying the slider and for applying a predetermined load to the slider, and a carriage arm to which the suspension is attached. The carriage arm includes a suspension fixing portion, first and second arms arranged substantially in parallel with a disk surface, and a restricting member having a surface opposite to the first and second arms. The restricting member and the first arm, and the restricting member and the second arm are coupled via a viscoelastic body.Type: GrantFiled: March 15, 2006Date of Patent: September 19, 2006Assignee: Hitachi Global Storage Technologies Japan, Ltd.Inventors: Toshihiko Shimizu, Tetsuya Hamaguchi, Toshihiro Arisaka, Hiromitsu Masuda, Gentaro Nakamura, Takenori Atsumi
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Publication number: 20060158786Abstract: A carriage for a magnetic disk apparatus includes a slider on which a magnetic head for reading/writing information from/to a disk is mounted, a suspension for carrying the slider and for applying a predetermined load to the slider, and a carriage arm to which the suspension is attached. The carriage arm includes a suspension fixing portion, first and second arms arranged substantially in parallel with a disk surface, and a restricting member having a surface opposite to the first and second arms. The restricting member and the first arm, and the restricting member and the second arm are coupled via a viscoelastic body.Type: ApplicationFiled: March 15, 2006Publication date: July 20, 2006Inventors: Toshihiko Shimizu, Tetsuya Hamaguchi, Toshihiro Arisaka, Hiromitsu Masuda, Gentaro Nakamura, Takenori Atsumi
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Patent number: 7031118Abstract: A carriage arm assembly for swingably supporting a magnetic head which includes a slider, a suspension carrying the slider, a carriage arm to which the suspension is attached, and a body section. The carriage arm extends from the body section and includes first and second arm members extending substantially in parallel with a swinging plane of the carriage arm, and a fixing portion provided at a distal end of the carriage arm for mounting the suspension thereon. Each of the first and second arm members have narrow sections in a distal end area and a base end area thereof, wherein a width of the narrow sections in a swinging direction is smaller than a width of an intermediate area of the first and second arm members.Type: GrantFiled: April 6, 2005Date of Patent: April 18, 2006Assignee: Hitachi Global Storage Technologies Japan, Ltd.Inventors: Toshihiko Shimizu, Tetsuya Hamaguchi, Toshihiro Arisaka, Hiromitsu Masuda, Gentaro Nakamura, Takenori Atsumi
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Patent number: 6982852Abstract: A magnetic disk drive having a high recording density and enabling high speed transfer is achieved by reducing vibration of a carriage arm assembly to reduce a positioning error. The disk drive is configured so that a carriage arm is configured by two arm portions, the arm portions being coupled to each other by a restraint member through a viscoelastic material, the restraint member being supported on a carriage body or an area of the carriage arm in the vicinity of the body by means of adhesion or a viscoelastic material. By providing a high damping effect against various vibration modes in which in-plane bending and out-plane bending of the carriage arm are generated, vibration of the carriage arm assembly is suppressed, so that the positioning error is reduced, thereby the magnetic disk drive having a high recording density can be achieved.Type: GrantFiled: February 26, 2003Date of Patent: January 3, 2006Assignee: Hitachi Global Storage Technologies Japan, Ltd.Inventors: Shin Nagahiro, Masahiko Sega, Toshihiro Arisaka, Toshihiko Shimizu, Hiromitsu Masuda, Tetsuya Hamaguchi, Gentaro Nakamura, Takenori Atumi
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Patent number: 6970330Abstract: A magnetic disk drive comprises at least one magnetic head for reading and writing information on at least one magnetic disk, a carriage supporting the magnetic head over the magnetic disk for movement of the magnetic head about a predetermined shaft, an annular coil supported by a bobbin provided on the carriage and subjected to an electromagnetic force for driving the carriage. The drive further comprises a first connection member for joining the annular coil and the bobbin, an in-coil member arranged inside the annular coil, and a second connection member for joining the in-coil member and the annular coil. A modulus of longitudinal elasticity of the in-coil member is larger than that of the first or second connection member. The drive thus formed has the increased carriage rigidity, the improved positioning accuracy of a magnetic head and the increased recording capacity of the disk.Type: GrantFiled: October 24, 2002Date of Patent: November 29, 2005Assignee: Hitachi Global Storage Technologies Japan, Ltd.Inventors: Toshihiro Arisaka, Hiromitsu Masuda, Toshihiko Shimizu, Gentaro Nakamura
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Publication number: 20050180056Abstract: A carriage arm assembly for swingably supporting a magnetic head which includes a slider, a suspension carrying the slider, a carriage arm to which the suspension is attached, and a body section. The body section includes first and second arm members extending substantially in parallel with a swinging plane of the carriage arm, and a fixing portion provided at a distal end of the carriage arm for mounting the suspension thereon. Each of the first and second arm members have narrow sections in a distal end area and a base end area thereof, wherein a width of the narrow sections in a swinging direction is smaller than a width of an intermediate area of the first and second arm members.Type: ApplicationFiled: April 6, 2005Publication date: August 18, 2005Inventors: Toshihiko Shimizu, Tetsuya Hamaguchi, Toshihiro Arisaka, Hiromitsu Masuda, Gentaro Nakamura, Takenori Atsumi
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Patent number: 6879467Abstract: According to the invention, there is provided a carriage arm assembly including a carriage arm having two arm members. The arm member is constructed in such a way that the width of its coil side end and the width of its suspension side end are narrower than that of its intermediate area. This construction widens a servo band width, improves positioning accuracy, and reduces positioning errors of a magnetic disk apparatus, so that recording density is improved and storage capacity is increased. Further, by coupling two arm members using a restriction member via a visco-elastic member, it is possible to achieve a high damping effect on various vibration modes including in-plane bending of the arms, and suppress vibration of the carriage so as to reduce the positioning errors.Type: GrantFiled: May 30, 2002Date of Patent: April 12, 2005Assignee: Hitachi Global Storage Technologies Japan, Ltd.Inventors: Toshihiko Shimizu, Tetsuya Hamaguchi, Toshihiro Arisaka, Hiromitsu Masuda, Gentaro Nakamura, Takenori Atsumi
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Patent number: 6657822Abstract: A magnetic disk apparatus includes a magnetic disk, a magnetic head for writing data into and reading data from the magnetic disk, a carriage pivoted on a pivot bearing while holding the magnetic head at its one end, the pivot bearing being constituted by a cylindrical sleeve serving as a fixed axle, bearing units each having an outer race fitted to the inside of the sleeve, bearing balls, and an inner race, and a shaft having the outside fitted to the inner races of the bearing units, thus, change of a pre-load caused by a heat expansion difference between the shaft and sleeve is an axial direction is compensated with a change of a pre-load caused thereby the same is a radius direction. Hence, the weight of a pivotally movable portion of an actuator is reduced.Type: GrantFiled: May 26, 2000Date of Patent: December 2, 2003Assignee: Hitachi, Ltd.Inventors: Gentaro Nakamura, Nobuyuki Okunaga, Toshihisa Okazaki, Isao Kobayashi, Toshihiro Arisaka
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Publication number: 20030218833Abstract: A magnetic disk drive having a high recording density and enabling high speed transfer is achieved by reducing vibration of a carriage arm assembly to reduce a positioning error. The disk drive is configured so that a carriage arm is configured by two arm portions, the arm portions being coupled to each other by a restraint member through a viscoelastic material, the restraint member being supported on a carriage body or an area of the carriage arm in the vicinity of the body by means of adhesion or a viscoelastic material. By providing a high damping effect against various vibration modes in which in-plane bending and out-plane bending of the carriage arm are generated, vibration of the carriage arm assembly is suppressed, so that the positioning error is reduced, thereby the magnetic disk drive having a high recording density can be achieved.Type: ApplicationFiled: February 26, 2003Publication date: November 27, 2003Inventors: Shin Nagahiro, Masahiko Sega, Toshihiro Arisaka, Toshihiko Shimizu, Hiromitsu Masuda, Tetsuya Hamaguchi, Gentaro Nakamura, Takenori Atsumi
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Publication number: 20030081356Abstract: According to the invention, there is provided a carriage arm assembly including a carriage arm having two arm members. The arm member is constructed in such a way that the width of its coil side end and the width of its suspension side end are narrower than that of its intermediate area. This construction widens a servo band width, improves positioning accuracy, and reduces positioning errors of a magnetic disk apparatus, so that recording density is improved and storage capacity is increased. Further, by coupling two arm members using a restriction member via a visco-elastic member, it is possible to achieve a high damping effect on various vibration modes including in-plane bending of the arms, and suppress vibration of the carriage so as to reduce the positioning errors.Type: ApplicationFiled: May 30, 2002Publication date: May 1, 2003Inventors: Toshihiko Shimizu, Tetsuya Hamaguchi, Toshihiro Arisaka, Hiromitsu Masuda, Gentaro Nakamura, Takenori Atsumi
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Publication number: 20030081355Abstract: A magnetic disk drive comprises at least one magnetic head for reading and writing information on at least one magnetic disk, a carriage supporting the magnetic head over the magnetic disk for movement of the magnetic head about a predetermined shaft, an annular coil supported by a bobbin provided on the carriage and subjected to an electromagnetic force for driving the carriage. The drive further comprises a first connection member for joining the annular coil and the bobbin, an in-coil member arranged inside the annular coil, and a second connection member for joining the in-coil member and the annular coil. A modulus of longitudinal elasticity of the in-coil member is larger than that of the first or second connection member. The drive thus formed has the increased carriage rigidity, the improved positioning accuracy of a magnetic head and the increased recording capacity of the disk.Type: ApplicationFiled: October 24, 2002Publication date: May 1, 2003Inventors: Toshihiro Arisaka, Hiromitsu Masuda, Toshihiko Shimizu, Gentaro Nakamura