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).
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Publication number: 20250025973Abstract: A cutting machining device includes a head, a holding unit, and a controller. The holding unit includes a workpiece holding portion, a contact plug-that a tool fixed to the head is contactable, a cover having a box shape and having a first opening in which the contact plug-is detachably held in a position separated from a fixed section of the workpiece holding portion in a surrounding wall, and a touch sensor that detects contact of a tip portion of the tool with the contact plug. The controller includes a calculator that calculates a machining start position by the tool, based on an initial position of the head and a contact position of the head which is detected by using the touch sensor, when the tip portion of the tool comes into contact with the contact plug.Type: ApplicationFiled: November 4, 2022Publication date: January 23, 2025Inventors: Koji TANAKA, Shuhei MURAOKA, Hidekazu TSUJI, Ryosuke YAMAZOE, Kenji INOUE, Akira NISHIKOHRI
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Patent number: 11994889Abstract: Provided is an overcurrent protection circuit including an overcurrent detection unit configured to compare an output current flowing through a switch element and a predetermined overcurrent detection value to generate an overcurrent detection signal, an output activation detection unit configured to compare an output voltage and a predetermined threshold voltage to generate an output activation detection signal, a logic unit configured to combine the overcurrent detection signal and the output activation detection signal to generate a logic operation signal, and a diagnostic output unit configured to provide diagnostic output, the logic unit shifting the logic operation signal to a logic level of abnormal state when the overcurrent detection signal is shifted to a logic level of overcurrent detection state and holding the logic operation signal at that logic level, unless the output activation detection signal is shifted to a logic level of output activation state.Type: GrantFiled: March 22, 2022Date of Patent: May 28, 2024Assignee: ROMM Co., LTD.Inventors: Kenji Muraoka, Toru Takuma
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Publication number: 20220308612Abstract: Provided is an overcurrent protection circuit including an overcurrent detection unit configured to compare an output current flowing through a switch element and a predetermined overcurrent detection value to generate an overcurrent detection signal, an output activation detection unit configured to compare an output voltage and a predetermined threshold voltage to generate an output activation detection signal, a logic unit configured to combine the overcurrent detection signal and the output activation detection signal to generate a logic operation signal, and a diagnostic output unit configured to provide diagnostic output, the logic unit shifting the logic operation signal to a logic level of abnormal state when the overcurrent detection signal is shifted to a logic level of overcurrent detection state and holding the logic operation signal at that logic level, unless the output activation detection signal is shifted to a logic level of output activation state.Type: ApplicationFiled: March 22, 2022Publication date: September 29, 2022Inventors: Kenji MURAOKA, Toru TAKUMA
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Patent number: 10510471Abstract: 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: GrantFiled: July 9, 2015Date of Patent: December 17, 2019Assignees: 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
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Patent number: 10346082Abstract: 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: GrantFiled: June 24, 2015Date of Patent: July 9, 2019Assignee: HITACHI LTD.Inventors: Azusa Jin, Hideo Saito, Shunji Kawamura, Kenji Muraoka, Kunihiko Nashimoto
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Publication number: 20180046404Abstract: 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: ApplicationFiled: June 24, 2015Publication date: February 15, 2018Applicant: HITACHI, LTD.Inventors: Azusa JIN, Hideo SAITO, Shunji KAWAMURA, Kenji MURAOKA, Kunihiko NASHIMOTO
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Publication number: 20170292631Abstract: 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: ApplicationFiled: November 5, 2015Publication date: October 12, 2017Applicant: Taiho Kogyo Co., Ltd.Inventor: Kenji MURAOKA
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Publication number: 20170178774Abstract: 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: ApplicationFiled: July 9, 2015Publication date: June 22, 2017Inventors: Hideki Matsuda, Kenji Muraoka, Toshiya Iwai, Junichi Ishii, Atsushi Kawamoto, Naoki Kitahara, Isao Shibuya, Yasuhiro Yamagata
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Patent number: 9581172Abstract: 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: GrantFiled: April 25, 2013Date of Patent: February 28, 2017Assignee: TAIHO KOGYO CO., LTD.Inventors: Satoru Kanbara, Keijiro Maki, Kenji Muraoka, Yasuhiro Otake, Takuya Suzuki
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Publication number: 20150093238Abstract: 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: ApplicationFiled: April 25, 2013Publication date: April 2, 2015Applicant: TAIHO KOGYO CO., LTD.Inventors: Satoru Kanbara, Keijiro Maki, Kenji Muraoka, Yasuhiro Otake, Takuya Suzuki
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Patent number: 8806125Abstract: 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: GrantFiled: April 20, 2012Date of Patent: August 12, 2014Assignee: Hitachi, Ltd.Inventors: Yoshifumi Zimoto, Go Uehara, Kenji Muraoka, Masaaki Kobayashi
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Patent number: 8583877Abstract: 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: GrantFiled: September 22, 2009Date of Patent: November 12, 2013Assignee: Hitachi, Ltd.Inventors: Akemi Sanada, Toshio Nakano, Hidehiko Iwasaki, Masahiko Sato, Kenji Muraoka, Kenichi Takamoto, Masaaki Kobayashi
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Patent number: 8347033Abstract: 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: GrantFiled: December 1, 2009Date of Patent: January 1, 2013Assignee: Hitachi, Ltd.Inventors: Yoshifumi Zimoto, Kenji Muraoka, Ikuya Yagisawa
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Patent number: 8275950Abstract: 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: GrantFiled: March 17, 2011Date of Patent: September 25, 2012Assignee: Hitachi, Ltd.Inventors: Akemi Sanada, Toshio Nakano, Hidehiko Iwasaki, Masahiko Sato, Kenji Muraoka, Kenichi Takamoto, Masaaki Kobayashi
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Publication number: 20120203966Abstract: 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: ApplicationFiled: April 20, 2012Publication date: August 9, 2012Inventors: Yoshifumi ZIMOTO, Go Uehara, Kenji Muraoka, Masaaki Kobayashi
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Patent number: 8219748Abstract: 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: GrantFiled: January 30, 2007Date of Patent: July 10, 2012Assignee: Hitachi, Ltd.Inventors: Go Uehara, Yoshifumi Zimoto, Kenji Muraoka, Masaaki Kobayashi
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Patent number: 8214606Abstract: 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: GrantFiled: April 25, 2011Date of Patent: July 3, 2012Assignee: Hitachi Ltd.Inventors: Teiko Kezuka, Yuko Matsui, Kenji Muraoka, Hisashi Takamatsu
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Patent number: 8185667Abstract: 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: GrantFiled: April 15, 2011Date of Patent: May 22, 2012Assignee: Hitachi, Ltd.Inventors: Yoshifumi Zimoto, Go Uehara, Kenji Muraoka, Masaaki Kobayashi
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Publication number: 20110271049Abstract: 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: ApplicationFiled: December 1, 2009Publication date: November 3, 2011Inventors: Yoshifumi Zimoto, Kenji Muraoka, Ikuya Yagisawa
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Publication number: 20110202717Abstract: 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: ApplicationFiled: April 25, 2011Publication date: August 18, 2011Applicant: HITACHI, LTD.Inventors: Teiko KEZUKA, Yuko MATSUI, Kenji MURAOKA, Hisashi TAKAMATSU