Patents by Inventor Tatsumi Uchigiri
Tatsumi Uchigiri 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: 8220010Abstract: There is provided a disc drive by which the fluid loss of a disc is reduced and the electric power consumption of a spindle motor can be decreased. In the disc drive according to the present invention, a rotation load reducing member is provided between a top cover and the disc. The rotation load reducing member is movably supported by a clearance adjustment member. While the disc is rotating, the rotation load reducing member is moved in the direction approaching the disc. Thereby, the thickness of an air layer on the upper surface of the disc is decreased.Type: GrantFiled: April 24, 2008Date of Patent: July 10, 2012Assignees: Hitachi, Ltd., Hitachi-LG Data Storage, Inc.Inventors: Yoshiaki Yamauchi, Mitsutaka Shizuya, Tatsumi Uchigiri, Hisahiro Miki, Ikuo Nishida, Shinya Tsubota
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Patent number: 8156512Abstract: The present invention provides a thin optical disc drive whose impact resistance performance is improved. An under cover 19 is provided with a collision evasion hole 21 at a position corresponding to an end of an optical head housing 25. Moreover, a bottom cover 4 is provided with an impact force buffering member 22 at a position corresponding to the collision evasion hole. When an impact force acts on an optical disc drive 1, the impact force to the optical head housing 25 is buffered by the structure. Consequently, it is possible to prevent the optical head 8 from being damaged, and it is possible to improve the reliability of the optical disc drive 1.Type: GrantFiled: January 29, 2007Date of Patent: April 10, 2012Assignees: Hitachi, Ltd., Hitachi-LG Data Storage, Inc.Inventors: Yoshiaki Yamauchi, Hiroshi Yamagishi, Kuniyuki Kimura, Shinya Tsubota, Tatsumi Uchigiri
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Publication number: 20080301720Abstract: There is provided a disc drive by which the fluid loss of a disc is reduced and the electric power consumption of a spindle motor can be decreased. In the disc drive according to the present invention, a rotation load reducing member is provided between a top cover and the disc. The rotation load reducing member is movably supported by a clearance adjustment member. While the disc is rotating, the rotation load reducing member is moved in the direction approaching the disc. Thereby, the thickness of an air layer on the upper surface of the disc is decreased.Type: ApplicationFiled: April 24, 2008Publication date: December 4, 2008Inventors: Yoshiaki Yamauchi, Mitsutaka Shizuya, Tatsumi Uchigiri, Hisahiro Miki, Ikuo Nishida, Shinya Tsubota
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Patent number: 7315960Abstract: In remote copy systems connected with a dedicated interface, reliability is reduced for the time until the disk system that caused an error will be recovered. Therefore, when an error occurs in a primary disk system, it is replaced with a standby disk system connected to a storage area network. As a result, a remote copy system with high reliability is obtained.Type: GrantFiled: July 29, 2004Date of Patent: January 1, 2008Assignee: Hitachi, Ltd.Inventors: Yoshifumi Takamoto, Tatsumi Uchigiri, Takao Sato
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Publication number: 20070234374Abstract: The present invention provides a thin optical disc drive whose impact resistance performance is improved. An under cover 19 is provided with a collision evasion hole 21 at a position corresponding to an end of an optical head housing 25. Moreover, a bottom cover 4 is provided with an impact force buffering member 22 at a position corresponding to the collision evasion hole. When an impact force acts on an optical disc drive 1, the impact force to the optical head housing 25 is buffered by the structure. Consequently, it is possible to prevent the optical head 8 from being damaged, and it is possible to improve the reliability of the optical disc drive 1.Type: ApplicationFiled: January 29, 2007Publication date: October 4, 2007Inventors: Yoshiaki Yamauchi, Hiroshi Yamagishi, Kuniyuki Kimura, Shiya Tsubota, Tatsumi Uchigiri
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Patent number: 6988087Abstract: The present invention provides a service method of rental storage, which, when a rental storage service provider provides a rental storage for rental storage service users, allows ideal use of storages in correspondence with the billing charge to the users by proposing the most optimum contract options to the users, and which allows suppressing the management cost of the users. The service method of rental storage through network connection, the storage provider will estimate the future usage of storage based on the history of usage of storage by the rental storage service user to report the estimation to the user. The rental storage service user will update the contract by expanding or reducing the amount of data usage so as to receive the most optimum contract conditions of rental storage service.Type: GrantFiled: August 2, 2001Date of Patent: January 17, 2006Assignee: Hitachi, Ltd.Inventors: Hiroki Kanai, Tatsumi Uchigiri, Kazuhisa Fujimoto
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Publication number: 20050022057Abstract: In remote copy systems connected with a dedicated interface, reliability is reduced for the time until the disk system that caused an error will be recovered. Therefore, when an error occurs in a primary disk system, it is replaced with a standby disk system connected to a storage area network. As a result, a remote copy system with high reliability is obtained.Type: ApplicationFiled: July 29, 2004Publication date: January 27, 2005Inventors: Yoshifumi Takamoto, Tatsumi Uchigiri, Takao Sato
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Patent number: 6792557Abstract: In remote copy systems connected with a dedicated interface, reliability is reduced for the time until the disk system that caused an error will be recovered. Therefore, when an error occurs in a primary disk system, it is replaced with a standby disk system connected to a storage area network. As a result, a remote copy system with high reliability is obtained.Type: GrantFiled: May 31, 2002Date of Patent: September 14, 2004Assignee: Hitachi, Ltd.Inventors: Yoshifumi Takamoto, Tatsumi Uchigiri, Takao Sato
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Publication number: 20020152181Abstract: The present invention provides a service method of rental storage, which, when a rental storage service provider provides a rental storage for rental storage service users, allows ideal use of storages in correspondence with the billing charge to the users by proposing the most optimum contract options to the users, and which allows suppressing the management cost of the users.Type: ApplicationFiled: August 2, 2001Publication date: October 17, 2002Applicant: Hitachi Ltd.Inventors: Hiroki Kanai, Tatsumi Uchigiri, Kazuhisa Fujimoto
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Patent number: 5555215Abstract: The present invention is intended to operate a semiconductor device at high speed with low voltage. A circuit configuration is used in which the transfer impedance between a common I/O line and a data line is changed depending on whether information is to be read or written. A current/voltage converter is provided which includes a MISFET different in conduction type to a select MISFET. Thus, the speed of reading information is increased. An intermediate voltage generator having high driving capability is provided. Thus, the circuit has sufficient driving capability for an LSI having large load capacitance. A voltage converter is provided which converts a data line supply voltage or word line supply voltage to a higher voltage. Therefore, stabilized signal transmission is ensured.Type: GrantFiled: October 5, 1995Date of Patent: September 10, 1996Assignees: Hitachi, Ltd, Hitachi ULSI Engineering CorporationInventors: Yoshinobu Nakagome, Kiyoo Itoh, Hitoshi Tanaka, Yasushi Watanabe, Eiji Kume, Masanori Isoda, Eiji Yamasaki, Tatsumi Uchigiri
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Patent number: 5264743Abstract: The present invention is intended to operate a semiconductor device at high speed with low voltage. A circuit configuration is used in which the transfer impedance between a common I/O line and a data line is changed depending on whether information is to be read or written. A current/voltage converter is provided which includes a MISFET different in conduction type to a select MISFET. Thus, the speed of reading information is increased. An intermediate voltage generator having high driving capability is provided. Thus, the circuit has sufficient driving capability for an LSI having large load capacitance. A voltage converter is provided which converts a data line supply voltage or word line supply voltage to a higher voltage. Therefore, stabilized signal transmission is ensured.Type: GrantFiled: November 29, 1990Date of Patent: November 23, 1993Assignees: Hitachi, Ltd., Hitachi VLSI Engineering CorporationInventors: Yoshinobu Nakagome, Kiyoo Itoh, Hitoshi Tanaka, Yasushi Watanabe, Eiji Kume, Masanori Isoda, Eiji Yamasaki, Tatsumi Uchigiri