Patents by Inventor Kei Shirahata

Kei Shirahata 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: 20100095315
    Abstract: Problem: A storage medium playback device includes a first playback means that plays back on the basis of information stored on a storage medium, a second playback means that plays back on the basis of information stored on a storage medium, and a single insertion slot through which a storage medium to be played back by the first playback means and a storage medium to be played back by the second playback means are inserted, wherein the storage playback device is capable of simultaneously playing back different storage media each with the first playback means and the second playback means; therefore, the area of an installation face for insertion slots is effectively used.
    Type: Application
    Filed: November 29, 2007
    Publication date: April 15, 2010
    Inventors: Kei Shirahata, Shigeki Asai, Takao Morimoto, Masayoshi Takehata
  • Patent number: 7243357
    Abstract: A disk device including a first disk holder movable with disk conveyance, a second disk holder opposed to a groove portion formed in the first disk holder and holding a disk grippingly in cooperation with the first disk holder when the first disk holder holds the disk, and a supporter which supports the first disk holder and which causes a support position for the first disk holder to be shifted in accordance with the movement of the first disk holder to be shifted in accordance with movement of the first disk holder, realizes reducing in size and number of parts, prevention of damage to disks, shortening operation time for plurality of operations, improved vibration resistance and less expensive manufacturing cost.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: July 10, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazutoshi Taniguchi, Kei Shirahata, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Kiichiro Murotani, Naohiko Obata, Yuichiro Suzui, Ryoto Adachi, Tetsuro Nagami, Takashi Matsuda, Yasuyuki Nakanishi, Masahiro Ieda
  • Patent number: 7059211
    Abstract: A rack and pinion gear mechanism includes a rack forming member having a rack; a pinion gear which engages releasably with the rack of rack forming member; and an elastic member which contacts with one portion of the rack forming member and deformed by an elastic deformation corresponding to a displacement of the rack forming member by a confliction of tooth points, the one portion is located opposite side to a tooth of the rack that contacts firstly with a tooth of the pinion gear and the gear mechanism further includes a positioning means to fix the elastic member in a cantilever manner to define a positioning of a free end of the elastic member in height.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: June 13, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Eiji Sasaki, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Tetsurou Nagami, Kiichiro Murotani, Hisashi Morita, Nao Watanabe, Takeshi Inatani, Masaaki Takeshima, Eiji Niikura
  • Patent number: 6996835
    Abstract: A disk device capable of storing a plurality of disks therein includes a disk holder capable of changing its vertical position to hold a disk, a driver to drive the disk holder, and the disk holder performs a rotational movement and the changing of its vertical height by means of the same driving mechanism of the driver. The disk device realizes a reduction in size and number of parts, prevention of damage to disks, a shortened operation time for a plurality of operations, improved vibration resistance, and a reduced manufacturing cost.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: February 7, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazutoshi Taniguchi, Kei Shirahata, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Kiichiro Murotani, Naohiko Obata, Yuichiro Suzui, Ryoto Adachi, Tetsuro Nagami, Takashi Matsuda, Yasuyuki Nakanishi, Masahiro Ieda
  • Patent number: 6996034
    Abstract: A disk device realizing reducing in size and number of parts, prevention of damage to disks, shortening operation time for plurality of operations, improved vibration resistance and less expensive manufacturing cost is provided. The disk device capable of storing a plurality of disks includes an operation setting means to actuate the disk holding means according to an operation mode of the disk, and an operation mode switching means to switch the operation mode of the operation setting means based on contents of disk operation.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: February 7, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazutoshi Taniguchi, Kei Shirahata, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Kiichiro Murotani, Naohiko Obata, Yuichiro Suzui, Ryoto Adachi, Tetsuro Nagami, Takashi Matsuda, Yasuyuki Nakanishi, Masahiro Ieda
  • Patent number: 6954935
    Abstract: A disk device for reproducing information includes a clamper that is used to clamp exchangeable disks. The disk device has a movement regulating member which is engaged with a sliding hole made on a base. A clamper base is engaged with a cam hole made on the movement regulating member to swing around a swinging axis on the base as a center. A clamper arm is supported on the clamper base to hold the clamper which clamps the disk. A positioning member is arranged on the base to abut with the clamper base when the clamper base swings. An energizing member urges the movement regulating member along a direction substantially perpendicular to the sliding direction of the movement regulating member.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: October 11, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Eiji Niikura, Takeshi Inatani, Masaaki Takeshima, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Tetsurou Nagami, Kiichiro Murotani, Hisashi Morita, Nao Watanabe
  • Patent number: 6948178
    Abstract: A disk device including a movable portion which supports pivotally and enably to swing a feed screw axis, a thread motor to drive a small gear and the like which engage with a gear interlocked in an end portion of the feed screw axis thereby to rotate the feed screw axis, and a control screw to perform a height control of the movable portion.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: September 20, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takeshi Inatani, Masaaki Takeshima, Eiji Niikura, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Tetsurou Nagami, Kiichiro Murotani, Hisashi Morita, Nao Watanabe
  • Patent number: 6912720
    Abstract: A disk device in which a precut portion of sub cam plate and a protruding portion of locking plate are made in a slanted shape and at the same time the sub cam plate is rotated by a pressure when the protruding portion is inserted into the precut portion.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: June 28, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kiichiro Murotani, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Tetsurou Nagami, Hisashi Morita, Nao Watanabe, Takeshi Inatani, Masaaki Takeshima, Eiji Niikura
  • Patent number: 6907612
    Abstract: By a disk device including: a reproducing base which is supported pivotally and enably to swing on a base, and on which a turntable is set; a supporting member which is supported pivotally and enably to swing on the base and which supports the reproducing base in a predetermined position; a clamper which is supported pivotally and enably to swing on the base and which opposes to the turntable to pinch and hold a disk; and a movement regulating member which regulates swing movements of the supporting member and the clamper, supporting by the supporting member in relation to the reproducing base is made sure to prevent deformation of the reproducing base by a clamping force of the clamper.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: June 14, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masaaki Takeshima, Eiji Niikura, Takeshi Inatani, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Tetsurou Nagami, Kiichiro Murotani, Hisashi Morita, Nao Watanabe
  • Patent number: 6883173
    Abstract: A disk device realizing reducing in size and number of parts, prevention of damage to disks, shortening operation time for plurality operations, improved vibration resistance and less expensive manufacturing cost is provided. The disk device capable of storing a plurality of disks loosely fitted and supported at its inner diameter, including separable loose mandrel mechanisms, when the mandrel mechanism is loosely fitted to the disk, the disk holder holds the disk, and one end of the a second mandrel mechanism is connected to another end of a first mandrel mechanism in a state that the disk is raised to a height abutting upon a support of a ceiling side formed on the first mandrel mechanism.
    Type: Grant
    Filed: September 20, 2000
    Date of Patent: April 19, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazutoshi Taniguchi, Kei Shirahata, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Kiichiro Murotani, Naohiko Obata, Yuichiro Suzui, Ryoto Adachi, Tetsuro Nagami, Takashi Matsuda, Yasuyuki Nakanishi, Masahiro Ieda
  • Patent number: 6842907
    Abstract: A MD loading mechanism for a multidisk MD reproducing apparatus capable of storing a plurality of MDs and of reproducing information recorded on the plurality of MDs successively comprises: a plurality of cartridge holders for holding MD cartridges therein, respectively; a MD cartridge storage unit for storing the plurality of cartridge holders therein in a stack so that the back end surfaces of the MD cartridges held within the cartridge holders can be seen from outside, provided with a plurality of insertion slots through which the MD cartridges are inserted in the cartridge holders and cartridge holder locking means for locking the cartridge holders within the MD cartridge storage unit; and a cartridge holder transfer means for transferring the cartridge holder holding a desired MD cartridge from the MD cartridge storage unit to the MD reproducing apparatus.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: January 11, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuyuki Nakanishi, Koutarou Oka, Kei Shirahata, Shigehiro Itou, Tatsunori Fujiwara
  • Patent number: 6817022
    Abstract: A disk device realizing reducing in size and number of parts, prevention of damage to disks, shortening operation time for plurality of operations, improved vibration resistance and less expensive manufacturing cost is provided. In the disk device when a disk is reproduced, a disk reproducing mechanism is moved to become a center of disk coincident with a center of turntable thereof, a first disk holding mechanism is moved downward to load the disk on the disk reproducing mechanism, then a disk clamping mechanism is moved to clamp the disk loaded on the disk reproducing mechanism, and the disk is reproduced after the first and second disk holding mechanism release the disk and are taken away from the disk.
    Type: Grant
    Filed: May 20, 2002
    Date of Patent: November 9, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazutoshi Taniguchi, Kei Shirahata, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Kiichiro Murotani, Naohiko Obata, Yuichiro Suzui, Ryoto Adachi, Tetsuro Nagami, Takashi Matsuda, Yasuyuki Nakanishi, Masahiro Ieda
  • Patent number: 6760914
    Abstract: A MD loading mechanism for a multidisk MD reproducing apparatus capable of storing a plurality of MDs and of reproducing information recorded on the plurality of MDs successively comprises: a plurality of cartridge holders for holding MD cartridges therein, respectively; a MD cartridge storage unit for storing the plurality of cartridge holders therein in a stack so that the back end surfaces of the MD cartridges held within the cartridge holders can be seen from outside, provided with a plurality of insertion slots through which the MD cartridges are inserted in the cartridge holders and cartridge holder locking means for locking the cartridge holders within the MD cartridge storage unit; and a cartridge holder transfer means for transferring the cartridge holder holding a desired MD cartridge from the MD cartridge storage unit to the MD reproducing apparatus.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: July 6, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuyuki Nakanishi, Koutarou Oka, Kei Shirahata, Shigehiro Itou, Tatsunori Fujiwara
  • Publication number: 20040035235
    Abstract: A rack and pinion gear mechanism includes a rack forming member having a rack; a pinion gear which engages releasably with the rack of rack forming member; and an elastic member which contacts with one portion of the rack forming member and deformed by an elastic deformation corresponding to a displacement of the rack forming member by a confliction of tooth points, the one portion is located opposite side to a tooth of the rack that contacts firstly with a tooth of the pinion gear. The elastic member contacts with the one portion of rack forming member at just before and just after beginning of the engagement between the rack and the pinion gear, and the elastic member is apart from the rack forming member when the engagement is achieved. The rack and pinion gear mechanism further includes a positioning means to fix the elastic member in a cantilever manner to define a positioning of a free end of the elastic member in height.
    Type: Application
    Filed: May 22, 2003
    Publication date: February 26, 2004
    Inventors: Eiji Sasaki, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Tetsurou Nagami, Kiichiro Murotani, Hisashi Morita, Nao Watanabe, Takeshi Inatani, Masaaki Takeshima, Eiji Niikura
  • Publication number: 20040032819
    Abstract: A disk device including a movable portion which supports pivotally and enably to swing a feed screw axis, a thread motor to drive a small gear and the like which engage with a gear interlocked in an end portion of the feed screw axis thereby to rotate the feed screw axis, and a control screw to perform a height control of the movable portion.
    Type: Application
    Filed: May 22, 2003
    Publication date: February 19, 2004
    Inventors: Takeshi Inatani, Masaaki Takeshima, Eiji Niikura, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Tetsurou Nagami, Kiichiro Murotani, Hisashi Morita, Nao Watanabe
  • Publication number: 20040017767
    Abstract: A disk device in which an energizing spring is arranged to energize a movement regulating member in a direction substantially perpendicular to a sliding direction of the movement regulating member.
    Type: Application
    Filed: May 22, 2003
    Publication date: January 29, 2004
    Inventors: Eiji Niikura, Takeshi Inatani, Masaaki Takeshima, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Tetsurou Nagami, Kiichiro Murotani, Hisashi Morita, Nao Watanabe
  • Publication number: 20040017756
    Abstract: A disc drive comprising a movement control member (12) for controlling the rotational motion of a supporting member (7) and a clamper (5).
    Type: Application
    Filed: May 22, 2003
    Publication date: January 29, 2004
    Inventors: Masaaki Takeshima, Eiji Niikura, Takeshi Inatani, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Tetsurou Nagami, Kiichiro Murotani, Hisashi Morita, Nao Watanabe
  • Publication number: 20040017741
    Abstract: A disk device constituted that a disk attitude stabilizing mechanism to rotate a disk when a front arm or a rear arm fails to grip the disk 11 and to retry a griping operation of the disk, is included.
    Type: Application
    Filed: May 22, 2003
    Publication date: January 29, 2004
    Inventors: Shoji Tatehata, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Eiji Sasaki, Tetsurou Nagami, Kiichiro Murotani, Hisashi Morita, Nao Watanabe, Takeshi Inatani, Masaaki Takeshima, Eiji Niikura
  • Publication number: 20040013006
    Abstract: A disk device in which a precut portion of sub cam plate and a protruding portion of locking plate are made in a slanted shape and at the same time the sub cam plate is rotated by a pressure when the protruding portion is inserted into the precut portion.
    Type: Application
    Filed: May 22, 2003
    Publication date: January 22, 2004
    Inventors: Kiichiro Murotani, Kei Shirahata, Kazutoshi Taniguchi, Takashi Kuzuu, Shoji Tatehata, Eiji Sasaki, Tetsurou Nagami, Hisashi Morita, Nao Watanabe, Takeshi Inatani, Masaaki Takeshima, Eiji Niikura
  • Publication number: 20030174592
    Abstract: A MD loading mechanism for a multidisk MD reproducing apparatus capable of storing a plurality of MDs and of reproducing information recorded on the plurality of MDs successively comprises: a plurality of cartridge holders for holding MD cartridges therein, respectively; a MD cartridge storage unit for storing the plurality of cartridge holders therein in a stack so that the back end surfaces of the MD cartridges held within the cartridge holders can be seen from outside, provided with a plurality of insertion slots through which the MD cartridges are inserted in the cartridge holders and cartridge holder locking means for locking the cartridge holders within the MD cartridge storage unit; and a cartridge holder transfer means for transferring the cartridge holder holding a desired MD cartridge from the MD cartridge storage unit to the MD reproducing apparatus.
    Type: Application
    Filed: April 14, 2003
    Publication date: September 18, 2003
    Applicant: Mitsubish Denki Kabushiki Kaisha
    Inventors: Yasuyuki Nakanishi, Koutarou Oka, Kei Shirahata, Shigehiro Itou, Tatsunori Fujiwara