Patents by Inventor Kazuo Ota
Kazuo Ota 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: 11118628Abstract: A fluid dynamic bearing device prevents an oleophobic agent from wetting and spreading to a tapered seal portion, including lubricating oil C filled in a condition in which the oil is separated sandwiching a separator portion 240 holding a gas layer arranged between two conical bearing members 201, and two primary tapered seal portions 230 each connecting to one of both ends along an axial direction of the separator portion 240, wherein width in a radial direction of the two primary tapered seal portion 230 decreases as each approaches toward the two conical bearing members 201, a gas-liquid interface of the lubricating oil C is located each of the two primary tapered seal portions 230, an oleophobic agent blocking portion 250 is arranged at each of both ends in an axial direction of the separator portion 240, a separator central portion 244 is arranged between the oleophobic agent blocking portions 250 of the separator portions 240, and an oleophobic coating is formed at least at the separator central portioType: GrantFiled: November 3, 2020Date of Patent: September 14, 2021Assignee: MINEBEA MITSUMI INC.Inventors: Hideaki Showa, Daigo Nakajima, Kazuo Ota
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Publication number: 20210140481Abstract: A fluid dynamic bearing device prevents an oleophobic agent from wetting and spreading to a tapered seal portion, including lubricating oil C filled in a condition in which the oil is separated sandwiching a separator portion 240 holding a gas layer arranged between two conical bearing members 201, and two primary tapered seal portions 230 each connecting to one of both ends along an axial direction of the separator portion 240, wherein width in a radial direction of the two primary tapered seal portion 230 decreases as each approaches toward the two conical bearing members 201, a gas-liquid interface of the lubricating oil C is located each of the two primary tapered seal portions 230, an oleophobic agent blocking portion 250 is arranged at each of both ends in an axial direction of the separator portion 240, a separator central portion 244 is arranged between the oleophobic agent blocking portions 250 of the separator portions 240, and an oleophobic coating is formed at least at the separator central portioType: ApplicationFiled: November 3, 2020Publication date: May 13, 2021Inventors: Hideaki SHOWA, Daigo NAKAJIMA, Kazuo OTA
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Patent number: 10393171Abstract: A fluid dynamic pressure bearing includes a conical bearing member having a conical bearing surface forming a first gap between a member constituting the rotor. A second gap connected to one end of the first gap and provided over the entire periphery of the shaft is formed between the conical bearing member and the shaft. A tapered seal portion is formed between the conical bearing member and the rotor. The conical bearing member is provided with a circulation hole that communicates the second gap and the tapered seal portion. The circulation hole communicates to another end of the first gap through a part of the tapered seal portion, so that the circulation hole and the other end of the first gap are spaced apart.Type: GrantFiled: March 13, 2018Date of Patent: August 27, 2019Assignee: MINEBEA MITSUMI INC.Inventors: Hideaki Showa, Daigo Nakajima, Kazuo Ota
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Publication number: 20180266482Abstract: A fluid dynamic pressure bearing includes a conical bearing member having a conical bearing surface forming a first gap between a member constituting the rotor. A second gap connected to one end of the first gap and provided over the entire periphery of the shaft is formed between the conical bearing member and the shaft. A tapered seal portion is formed between the conical bearing member and the rotor. The conical bearing member is provided with a circulation hole that communicates the second gap and the tapered seal portion. The circulation hole communicates to another end of the first gap through a part of the tapered seal portion, so that the circulation hole and the other end of the first gap are spaced apart.Type: ApplicationFiled: March 13, 2018Publication date: September 20, 2018Inventors: Hideaki SHOWA, Daigo NAKAJIMA, Kazuo OTA
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Patent number: 9418238Abstract: A searchable encryption resistant to frequency analysis. A conversion rule management device generates a conversion rule table associating a search keyword with a conversion keyword group. Based on the conversion rule table, a data registration device generates registration data associating encrypted data with an encrypted keyword, and registers the registration data in a server device. An information processing device obtains from the conversion rule table a conversion keyword group associated with a specified search keyword, generates an encrypted keyword group, and requests a data search by specifying the encrypted keyword group. Using as a search key an encrypted keyword included in the encrypted keyword group, the server device searches for encrypted data associated with the search key, and returns searched encrypted data. The information processing device decrypts the searched encrypted data, and outputs as a search result search data obtained by decryption.Type: GrantFiled: February 20, 2012Date of Patent: August 16, 2016Assignees: Mitsubishi Electric Corporation, The University of Electro-CommunicationsInventors: Takashi Ito, Mitsuhiro Hattori, Nori Matsuda, Kazuo Ota, Yusuke Sakai
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Patent number: 8652381Abstract: A resin transfer molding (RTM) molding device is designed to mold a fiber-reinforced plastic (FRP) molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a chain curing polymer (CCP). A CCP accommodating layer is disposed adjacent to an outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP to the exterior. An element for separating the molded body is disposed between the body and the layer.Type: GrantFiled: June 26, 2013Date of Patent: February 18, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Noriya Hayashi, Hiroshi Mizuno, Koichi Hasegawa, Kazuo Ota
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Patent number: 8647095Abstract: A resin transfer molding (RTM) molding device is designed to mold a fiber-reinforced plastic (FRP) molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a chain curing polymer (CCP). A CCP accommodating layer is disposed adjacent to an outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP to the exterior. An element for separating the molded body is disposed between the body and the layer.Type: GrantFiled: June 26, 2013Date of Patent: February 11, 2014Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Noriya Hayashi, Hiroshi Mizuno, Koichi Hasegawa, Kazuo Ota
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Publication number: 20130332729Abstract: A searchable encryption resistant to frequency analysis. A conversion rule management device generates a conversion rule table associating a search keyword with a conversion keyword group. Based on the conversion rule table, a data registration device generates registration data associating encrypted data with an encrypted keyword, and registers the registration data in a server device. An information processing device obtains from the conversion rule table a conversion keyword group associated with a specified search keyword, generates an encrypted keyword group, and requests a data search by specifying the encrypted keyword group. Using as a search key an encrypted keyword included in the encrypted keyword group, the server device searches for encrypted data associated with the search key, and returns searched encrypted data. The information processing device decrypts the searched encrypted data, and outputs as a search result search data obtained by decryption.Type: ApplicationFiled: February 20, 2012Publication date: December 12, 2013Applicants: THE UNIVERSITY OF ELECTRO-COMMUNICATIONS, Mitsubishi Electric CorporationInventors: Takashi Ito, Mitsuhiro Hattori, Nori Matsuda, Kazuo Ota, Yusuke Sakai
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Publication number: 20130287877Abstract: A resin transfer molding (RTM) molding device is designed to mold a fiber-reinforced plastic (FRP) molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a chain curing polymer (CCP). A CCP accommodating layer is disposed adjacent to an outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP to the exterior. An element for separating the molded body is disposed between the body and the layer.Type: ApplicationFiled: June 26, 2013Publication date: October 31, 2013Inventors: Noriya HAYASHI, Hiroshi MIZUNO, Koichi HASEGAWA, Kazuo OTA
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Publication number: 20130285293Abstract: A resin transfer molding (RTM) molding device is designed to mold a fiber-reinforced plastic (FRP) molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a chain curing polymer (CCP). A CCP accommodating layer is disposed adjacent to an outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP to the exterior. An element for separating the molded body is disposed between the body and the layer.Type: ApplicationFiled: June 26, 2013Publication date: October 31, 2013Inventors: Noriya HAYASHI, Hiroshi MIZUNO, Koichi HASEGAWA, Kazuo OTA
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Patent number: 8506278Abstract: A resin transfer molding (RTM) molding device is designed to mold a fiber-reinforced plastic (FRP) molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a chain curing polymer (CCP). A CCP accommodating layer is disposed adjacent to an outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP to the exterior. An element for separating the molded body is disposed between the body and the layer.Type: GrantFiled: August 8, 2007Date of Patent: August 13, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Noriya Hayashi, Hiroshi Mizuno, Koichi Hasegawa, Kazuo Ota
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Patent number: 8501070Abstract: A resin transfer molding (RTM) molding device is designed to mold a fiber-reinforced plastic (FRP) molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a chain curing polymer (CCP). A CCP accommodating layer is disposed adjacent to an outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP to the exterior. An element for separating the molded body is disposed between the body and the layer.Type: GrantFiled: July 7, 2011Date of Patent: August 6, 2013Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Noriya Hayashi, Hiroshi Mizuno, Koichi Hasegawa, Kazuo Ota
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Patent number: 8144256Abstract: A repeater unit includes an input circuit having an input terminal that can be connected to output of an upstream repeater unit through a signal cable for inputting a video signal from the input terminal; an output circuit having an output terminal that can be connected to input of a downstream repeater unit through a signal cable for outputting a video signal to the output terminal; and a selection circuit that can be connected to a video signal output device for outputting a video signal and outputs the video signal input from the video signal output device to the output circuit. The input circuit and the output circuit have termination resistors matched with each other. When the repeater units are daisy-chained, termination matching is conducted.Type: GrantFiled: October 4, 2006Date of Patent: March 27, 2012Assignee: Panasonic CorporationInventor: Kazuo Ota
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Publication number: 20110260376Abstract: The present invention relates to an RTM molding device designed to mold a FRP molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a CCP. A CCP accommodating layer is disposed adjacent to the outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP into the exterior. A means for separating the molded body is disposed between the body and the layer.Type: ApplicationFiled: July 7, 2011Publication date: October 27, 2011Inventors: Noriya HAYASHI, Hiroshi Mizuno, Koichi Hasegawa, Kazuo Ota
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Patent number: 7785525Abstract: Provided is an RTM molding method enabling to yield an FRP molded body formed so as to be increased in the fiber volume content and to thereby be made more excellent in strength and lightweightness. The resin composition is a chain-curing resin composition, and after the initiation of the curing of the resin composition, the highest temperature at the curing head of the resin composition, undergoing chain curing, within 10 seconds after the initiation of the curing is increased to be higher by 50° C. or more than the temperature of the resin composition at after the impregnation and before the curing, and thus, the resin composition is chain-cured with a Vf of 41% or more.Type: GrantFiled: July 27, 2006Date of Patent: August 31, 2010Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Noriya Hayashi, Hiroshi Mizuno, Koichi Hasegawa, Kazuo Ota
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Publication number: 20090184437Abstract: The present invention relates to an RTM molding device designed to mold a FRP molded body by injecting a resin composition into a mold and by impregnating the molded body therewith. The resin composition is a CCP. A CCP accommodating layer is disposed adjacent to the outer side of the molded body. The layer contains the CCP. The layer is provided with a Vf limit value, the value defined by the curing characteristics of the CCP and the characteristics of dissipation of heat from the CCP into the exterior. A means for separating the molded body is disposed between the body and the layer.Type: ApplicationFiled: August 8, 2007Publication date: July 23, 2009Inventors: Noriya Hayashi, Hiroshi Mizuno, Koichi Hasegawa, Kazuo Ota
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Publication number: 20090102978Abstract: A repeater unit includes an input circuit having an input terminal that can be connected to output of an upstream repeater unit through a signal cable for inputting a video signal from the input terminal; an output circuit having an output terminal that can be connected to input of a downstream repeater unit through a signal cable for outputting a video signal to the output terminal; and a selection circuit that can be connected to a video signal output device for outputting a video signal and outputs the video signal input from the video signal output device to the output circuit. The input circuit and the output circuit have termination resistors matched with each other. When the repeater units are daisy-chained, termination matching is conducted.Type: ApplicationFiled: October 4, 2006Publication date: April 23, 2009Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventor: Kazuo Ota
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Publication number: 20090051067Abstract: Provided is an RTM molding method enabling to yield an FRP molded body formed so as to be increased in the fiber volume content and to thereby be made more excellent in strength and lightweightness. The resin composition is a chain-curing resin composition, and after the initiation of the curing of the resin composition, the highest temperature at the curing head of the resin composition, undergoing chain curing, within 10 seconds after the initiation of the curing is increased to be higher by 50° C. or more than the temperature of the resin composition at after the impregnation and before the curing, and thus, the resin composition is chain-cured with a Vf of 41% or more.Type: ApplicationFiled: July 27, 2006Publication date: February 26, 2009Inventors: Noriya Hayashi, Hiroshi Mizuno, Koichi Hasegawa, Kazuo Ota
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Patent number: 7098940Abstract: Herein disclosed is a surveillance system, comprising: a camera unit for transforming an image into an image signal and outputting the image signal, and a display unit having a screen and operative to transform into an image the image signal outputted by the camera unit to display the image on the screen. The camera unit is operative to automatically chase an object as a chasing target to have the display unit display the object as the chasing target. The display unit includes marker displaying means for displaying a marker on the screen; and chasing target determining means for determining the object spaced apart from the marker at a predetermined distance as the chasing target among the images displayed on the screen.Type: GrantFiled: June 21, 2001Date of Patent: August 29, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kazuya Suzuki, Toshikazu Saito, Kazuo Ota
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Publication number: 20030202123Abstract: A synchronous signal superimposing apparatus and a synchronous signal superimposing method are disclosed which do not require a high power supply voltage, and do not bring about the deterioration in the frequency property of a termination system caused by frequency properties of a coupling capacitor and a driver, and do not require the mechanism for changing the setting of a termination circuit through a switching operation and the like, correspondingly to a camera side. In this apparatus, a constant current driver for responding to an external synchronous signal and a capacitor for stopping a direct current component in an output signal from this constant current driver are placed correspondingly to each of a plurality of cables connected to image pickup units.Type: ApplicationFiled: April 24, 2003Publication date: October 30, 2003Inventors: Kazuo Ota, Takuya Yamauchi