Patents by Inventor Kenji Muraoka

Kenji Muraoka 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).

  • Patent number: 10510471
    Abstract: A composition for bonded magnets according to the present invention contains from 88% by mass to 91% by mass (inclusive) of a samarium-iron-nitrogen magnet powder having an average particle diameter of from 1.8 ?m to 2.8 ?m (inclusive), from 0.5% by mass to 2.5% by mass (inclusive) of a polyamide elastomer having a tensile elongation at break of 400% or more and a bending modulus of elasticity of 100 MPa or more, from 0.5% by mass to 2.0% by mass (inclusive) of carbon fibers having fiber diameters of from 10 ?m to 12 ?m (inclusive) and from 0.3% by mass to 1.0% by mass (inclusive) of a carboxylic acid ester, with the balance made up of a polyamide resin which is composed of a polyamide 12 having a weight average molecular weight (Mw) of from 4,500 to 7,500 (inclusive) as determined by molecular weight distribution measurement.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: December 17, 2019
    Assignees: SUMITOMO METAL MINING CO., LTD., MABUCHI MOTOR CO., LTD.
    Inventors: Hideki Matsuda, Kenji Muraoka, Toshiya Iwai, Junichi Ishii, Atsushi Kawamoto, Naoki Kitahara, Isao Shibuya, Yasuhiro Yamagata
  • Patent number: 10346082
    Abstract: A storage system manages control information, which is information related to responses corresponding to prescribed types of commands, for each of a plurality of logical units associated with a logical device, said logical units being provided to one or more host systems. The prescribed types of commands indicating the logical units provided to a first host system, which is one of the one or more host systems, are received from the first host system by the storage system. Responses based on the control information corresponding to the logical units indicated by the received prescribed types of commands are returned to the first host system by the storage system as responses to the received prescribed types of commands.
    Type: Grant
    Filed: June 24, 2015
    Date of Patent: July 9, 2019
    Assignee: HITACHI LTD.
    Inventors: Azusa Jin, Hideo Saito, Shunji Kawamura, Kenji Muraoka, Kunihiko Nashimoto
  • Publication number: 20180046404
    Abstract: A storage system manages control information, which is information related to responses corresponding to prescribed types of commands, for each of a plurality of logical units associated with a logical device, said logical units being provided to one or more host systems. The prescribed types of commands indicating the logical units provided to a first host system, which is one of the one or more host systems, are received from the first host system by the storage system. Responses based on the control information corresponding to the logical units indicated by the received prescribed types of commands are returned to the first host system by the storage system as responses to the received prescribed types of commands.
    Type: Application
    Filed: June 24, 2015
    Publication date: February 15, 2018
    Applicant: HITACHI, LTD.
    Inventors: Azusa JIN, Hideo SAITO, Shunji KAWAMURA, Kenji MURAOKA, Kunihiko NASHIMOTO
  • Publication number: 20170292631
    Abstract: Provided is a waste gate valve capable of absorbing pulsation following the pulsation of a fluid pressure. In a waste gate valve, a drive gear is rotationally driven by a drive motor, the rotational drive of the drive gear allows a valve shaft engageable with the drive gear to advance or retreat in an axial direction, and the advance or retreat of the valve shaft moves a valve provided at the valve shaft from a valve seat so as to open or close a channel. The waste gate valve includes a main spring for urging the valve in a closure direction. Fluid pressure acting on the valve is transmitted to the drive motor as a load. Furthermore, the waste gate valve includes a damper spring for urging the valve in an open direction.
    Type: Application
    Filed: November 5, 2015
    Publication date: October 12, 2017
    Applicant: Taiho Kogyo Co., Ltd.
    Inventor: Kenji MURAOKA
  • Publication number: 20170178774
    Abstract: A composition for bonded magnets according to the present invention contains from 88% by mass to 91% by mass (inclusive) of a samarium-iron-nitrogen magnet powder having an average particle diameter of from 1.8 ?m to 2.8 ?m (inclusive), from 0.5% by mass to 2.5% by mass (inclusive) of a polyamide elastomer having a tensile elongation at break of 400% or more and a bending modulus of elasticity of 100 MPa or more, from 0.5% by mass to 2.0% by mass (inclusive) of carbon fibers having fiber diameters of from 10 ?m to 12 ?m (inclusive) and from 0.3% by mass to 1.0% by mass (inclusive) of a carboxylic acid ester, with the balance made up of a polyamide resin which is composed of a polyamide 12 having a weight average molecular weight (Mw) of from 4,500 to 7,500 (inclusive) as determined by molecular weight distribution measurement.
    Type: Application
    Filed: July 9, 2015
    Publication date: June 22, 2017
    Inventors: Hideki Matsuda, Kenji Muraoka, Toshiya Iwai, Junichi Ishii, Atsushi Kawamoto, Naoki Kitahara, Isao Shibuya, Yasuhiro Yamagata
  • Patent number: 9581172
    Abstract: There is provided a method for manufacturing a turbocharger bearing housing which can prevent a collapsible core from being damaged when molten metal is cast in the mold. The method for manufacturing a bearing housing of a turbocharger is that the bearing housing of the turbocharger is formed with a cooling passage for circulating cooling liquid by casting using a collapsible core. The collapsible core includes the end part forming portions (a one end forming portion and an other end forming portion) corresponding to the end portions of the cooling passage and having a substantially elliptical cross-section, and a fixing portion holding the end part forming portions and being embedded in a mold and fixed to the mold.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: February 28, 2017
    Assignee: TAIHO KOGYO CO., LTD.
    Inventors: Satoru Kanbara, Keijiro Maki, Kenji Muraoka, Yasuhiro Otake, Takuya Suzuki
  • Publication number: 20150093238
    Abstract: There is provided a method for manufacturing a turbocharger bearing housing which can prevent a collapsible core from being damaged when molten metal is cast in the mold. The method for manufacturing a bearing housing of a turbocharger is that the bearing housing of the turbocharger is formed with a cooling passage for circulating cooling liquid by casting using a collapsible core. The collapsible core includes the end part forming portions (a one end forming portion and an other end forming portion) corresponding to the end portions of the cooling passage and having a substantially elliptical cross-section, and a fixing portion holding the end part forming portions and being embedded in a mold and fixed to the mold.
    Type: Application
    Filed: April 25, 2013
    Publication date: April 2, 2015
    Applicant: TAIHO KOGYO CO., LTD.
    Inventors: Satoru Kanbara, Keijiro Maki, Kenji Muraoka, Yasuhiro Otake, Takuya Suzuki
  • Patent number: 8806125
    Abstract: A storage system constituted such that power saving to an administrator-desired storage device can be performed from a management device. That is, the storage system comprises a power-saving indication receiving section for receiving from a management console a power-saving indication specifying at least one storage device of a plurality of RAID groups, a plurality of logical units, and a plurality of physical storage devices; and a power-saving controller for saving on power to one or more physical storage devices corresponding to the storage device specified in this power-saving indication.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: August 12, 2014
    Assignee: Hitachi, Ltd.
    Inventors: Yoshifumi Zimoto, Go Uehara, Kenji Muraoka, Masaaki Kobayashi
  • Patent number: 8583877
    Abstract: A storage system adapted to be coupled to a plurality of host devices via a fiber channel. The storage system including a plurality of storage devices, at least a portion of the plurality of storage devices corresponding to a logical unit of a plurality of logical units, the logical unit having a logical unit number (LUN). The storage system also including a storage control device having a cache memory and controlling to store data, addressed to the LUN, into the portion of the plurality of storage devices. The storages system also including an input device being adapted to be used to set information, which is used to prevent an unauthorized access to the logical unit and which corresponds to a relationship between a host device of the plurality of host devices and the logical unit.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: November 12, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Akemi Sanada, Toshio Nakano, Hidehiko Iwasaki, Masahiko Sato, Kenji Muraoka, Kenichi Takamoto, Masaaki Kobayashi
  • Patent number: 8347033
    Abstract: A data element that is identical to a part of a plurality of data elements stored in a logical storage device (LU hereinbelow) is stored in a storage area (pool hereinbelow) separate from the LU. A first PDEV (physical storage device) that stores the data element stored in the LU may be placed in a power saving state while the storage system is operating (in periods when a read command can be received), and a second PDEV which stores the data element stored in the pool is not placed in a power saving state during operation. When the storage system receives a read command which is received from the host apparatus, and if the first PDEV is in the power saving state and a data element identical to the data element which is the target of the read command is stored in the pool, the storage system reads the identical data element from the pool without canceling the power saving state of the first PDEV, and sends the read data element to the host apparatus.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: January 1, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Yoshifumi Zimoto, Kenji Muraoka, Ikuya Yagisawa
  • Patent number: 8275950
    Abstract: A storage system adapted to be coupled to a plurality of host devices via a fibre channel. The storage system including a plurality of storage devices, at least a portion of the plurality of storage devices corresponding to a logical unit of a plurality of logical units, the logical unit having a logical unit number (LUN). The storage system also including a storage control device having a cache memory and controlling to store data, addressed to the LUN, into the portion of the plurality of storage devices. The storages system also including an input device being adapted to be used to set information, which is used to prevent an unauthorized access to the logical unit and which corresponds to a relationship between a host device of the plurality of host devices and the logical unit.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: September 25, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Akemi Sanada, Toshio Nakano, Hidehiko Iwasaki, Masahiko Sato, Kenji Muraoka, Kenichi Takamoto, Masaaki Kobayashi
  • Publication number: 20120203966
    Abstract: A storage system constituted such that power saving to an administrator-desired storage device can be performed from a management device. That is, the storage system comprises a power-saving indication receiving section for receiving from a management console a power-saving indication specifying at least one storage device of a plurality of RAID groups, a plurality of logical units, and a plurality of physical storage devices; and a power-saving controller for saving on power to one or more physical storage devices corresponding to the storage device specified in this power-saving indication.
    Type: Application
    Filed: April 20, 2012
    Publication date: August 9, 2012
    Inventors: Yoshifumi ZIMOTO, Go Uehara, Kenji Muraoka, Masaaki Kobayashi
  • Patent number: 8219748
    Abstract: The respective physical storage devices of a storage system are set to a power-saving state in which these respective physical storage devices are able to respond to a prescribed type of command. Then, a first prescribed type of command is sent to the respective physical storage devices that are in the power-saving state, and the results of this first prescribed type of command are checked.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: July 10, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Go Uehara, Yoshifumi Zimoto, Kenji Muraoka, Masaaki Kobayashi
  • Patent number: 8214606
    Abstract: The plurality of host systems or the plurality of applications include an insertion unit for sending the identifier. The storage controller includes an analysis unit for identifying a host system or an application based on the identifier contained in the access information and analyzing an access pattern of access information sent from the identified host system or application, a management unit for managing the identifier, the analysis result of the access pattern analyzed with the analysis unit, and a control method for controlling the processing of data to be sent from a host system based on the analysis result or data to be stored in a logical volume, and a data processing controller for controlling the processing of data to be sent from a host system or data to be stored in a logical volume according to the control method managed by the management unit.
    Type: Grant
    Filed: April 25, 2011
    Date of Patent: July 3, 2012
    Assignee: Hitachi Ltd.
    Inventors: Teiko Kezuka, Yuko Matsui, Kenji Muraoka, Hisashi Takamatsu
  • Patent number: 8185667
    Abstract: A storage system constituted such that power saving to an administrator-desired storage device can be performed from a management device. That is, the storage system comprises a power-saving indication receiving section for receiving from a management console a power-saving indication specifying at least one storage device of a plurality of RAID groups, a plurality of logical units, and a plurality of physical storage devices; and a power-saving controller for saving on power to one or more physical storage devices corresponding to the storage device specified in this power-saving indication.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: May 22, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Yoshifumi Zimoto, Go Uehara, Kenji Muraoka, Masaaki Kobayashi
  • Publication number: 20110271049
    Abstract: A data element that is identical to a part of a plurality of data elements stored in a logical storage device (LU hereinbelow) is stored in a storage area (pool hereinbelow) separate from the LU. A first PDEV (physical storage device) that stores the data element stored in the LU may be placed in a power saving state while the storage system is operating (in periods when a read command can be received), and a second PDEV which stores the data element stored in the pool is not placed in a power saving state during operation. When the storage system receives a read command which is received from the host apparatus, and if the first PDEV is in the power saving state and a data element identical to the data element which is the target of the read command is stored in the pool, the storage system reads the identical data element from the pool without canceling the power saving state of the first PDEV, and sends the read data element to the host apparatus.
    Type: Application
    Filed: December 1, 2009
    Publication date: November 3, 2011
    Inventors: Yoshifumi Zimoto, Kenji Muraoka, Ikuya Yagisawa
  • Publication number: 20110202717
    Abstract: The plurality of host systems or the plurality of applications include an insertion unit for sending the identifier. The storage controller includes an analysis unit for identifying a host system or an application based on the identifier contained in the access information and analyzing an access pattern of access information sent from the identified host system or application, a management unit for managing the identifier, the analysis result of the access pattern analyzed with the analysis unit, and a control method for controlling the processing of data to be sent from a host system based on the analysis result or data to be stored in a logical volume, and a data processing controller for controlling the processing of data to be sent from a host system or data to be stored in a logical volume according to the control method managed by the management unit.
    Type: Application
    Filed: April 25, 2011
    Publication date: August 18, 2011
    Applicant: HITACHI, LTD.
    Inventors: Teiko KEZUKA, Yuko MATSUI, Kenji MURAOKA, Hisashi TAKAMATSU
  • Publication number: 20110197083
    Abstract: A storage system constituted such that power saving to an administrator-desired storage device can be performed from a management device. That is, the storage system comprises a power-saving indication receiving section for receiving from a management console a power-saving indication specifying at least one storage device of a plurality of RAID groups, a plurality of logical units, and a plurality of physical storage devices; and a power-saving controller for saving on power to one or more physical storage devices corresponding to the storage device specified in this power-saving indication.
    Type: Application
    Filed: April 15, 2011
    Publication date: August 11, 2011
    Inventors: Yoshifumi Zimoto, Go Uehara, Kenji Muraoka, Masaaki Kobayashi
  • Patent number: 7984227
    Abstract: In an environment in which plural external storage devices having different function control interfaces are intermixed, when a function of a storage device is controlled from a computer, a common interface for controlling the function of the storage device is provided. A device that provides the common interface manages an interrelationship between a storage area recognized by a host computer and a storage area provided by the storage device and associates a storage area which becomes a target of a function control instruction with the storage device that provides the storage area. A type of the storage device that provides the storage area which becomes the target of the function control instruction is identified and function control is ordered through a function control interface unique to the device.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: July 19, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Yasuyuki Mimatsu, Yasutomo Yamamoto, Kenji Muraoka
  • Publication number: 20110173388
    Abstract: A storage system adapted to be coupled to a plurality of host devices via a fibre channel. The storage system including a plurality of storage devices, at least a portion of the plurality of storage devices corresponding to a logical unit of a plurality of logical units, the logical unit having a logical unit number (LUN). The storage system also including a storage control device having a cache memory and controlling to store data, addressed to the LUN, into the portion of the plurality of storage devices. The storages system also including an input device being adapted to be used to set information, which is used to prevent an unauthorized access to the logical unit and which corresponds to a relationship between a host device of the plurality of host devices and the logical unit.
    Type: Application
    Filed: March 17, 2011
    Publication date: July 14, 2011
    Applicant: HITACHI, LTD.
    Inventors: Akemi Sanada, Toshio Nakano, Hidehiko Iwasaki, Masahiko Sato, Kenji Muraoka, Kenichi Takamoto, Masaaki Kobayashi