Patents by Inventor Naoki Imamura
Naoki Imamura 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: 9910119Abstract: A magnetic resonance imaging (MR) apparatus includes a mode switching part and an imaging system. The mode switching part is configured to put a circuit system consuming power into a shutdown state when a first trigger has been detected and to put the circuit system back into a startup state when a second trigger has been detected. The first trigger shows that MR imaging does not start for a certain period. The second trigger shows that MR imaging starts. The imaging system is configured to perform MR imaging by using the circuit system after being set to the startup state.Type: GrantFiled: May 25, 2016Date of Patent: March 6, 2018Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Motohisa Yokoi, Kanta Kobuchi, Sho Kawajiri, Masaaki Yamanaka, Naoki Imamura, Hitoshi Kanazawa
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Publication number: 20170293002Abstract: According to one embodiment, a magnetic resonance imaging apparatus installed in a shield room comprises a gantry, a table, and at least one unit. The gantry includes a static magnetic field magnet, a gradient magnetic field coil, and an RF coil. The subject is to be placed on the table. The at least one unit relates to control of the magnetic resonance imaging apparatus and is configured to include at least one opening on a upper surface on for maintenance and inspection.Type: ApplicationFiled: June 23, 2017Publication date: October 12, 2017Applicant: Toshiba Medical Systems CorporationInventors: Kazuyuki SOEJIMA, Naoki IMAMURA, Naho IMAMURA
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Patent number: 9759790Abstract: A magnetic resonance imaging device according to an embodiment includes a gradient amplifier, a battery, a detector, and a battery controller. The gradient amplifier supplies electric power to the gradient coil. The battery is charged with electric power that is supplied from the power supply. The detector detects a high power output request on the gradient amplifier. The battery controller controls to supply electric power charged in the battery in addition to electric power supplied from the power supply to the gradient amplifier when the high power output request is detected.Type: GrantFiled: June 25, 2014Date of Patent: September 12, 2017Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Sho Kawajiri, Motohisa Yokoi, Motohiro Miura, Masashi Hori, Kazuyuki Soejima, Naoki Imamura, Haruki Nakamura
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Publication number: 20160274206Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a mode switching part and an imaging system. The mode switching part is configured to put a circuit system consuming a power into a shutdown state when a first trigger has been detected and put the circuit system being the shutdown state into a startup state when a second trigger has been detected. The first trigger shows that an imaging does not start for a certain period. The second trigger shows that the imaging starts. The imaging system is configured to perform the imaging by using the circuit system being the startup state.Type: ApplicationFiled: May 25, 2016Publication date: September 22, 2016Inventors: Motohisa YOKOI, Kanta KOBUCHI, Sho KAWAJIRI, Masaaki YAMANAKA, Naoki IMAMURA, Hitoshi KANAZAWA
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Patent number: 9383422Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a mode switching part and an imaging system. The mode switching part is configured to put a circuit system consuming a power into a shutdown state when a first trigger has been detected and put the circuit system being the shutdown state into a startup state when a second trigger has been detected. The first trigger shows that an imaging does not start for a certain period. The second trigger shows that the imaging starts. The imaging system is configured to perform the imaging by using the circuit system being the startup state.Type: GrantFiled: November 21, 2012Date of Patent: July 5, 2016Assignee: TOSHIBA MEDICAL SYSTEMS CORPORATIONInventors: Motohisa Yokoi, Kanta Kobuchi, Sho Kawajiri, Masaaki Yamanaka, Naoki Imamura, Hitoshi Kanazawa
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Publication number: 20140300362Abstract: A magnetic resonance imaging device according to an embodiment includes a gradient amplifier, a battery, a detector, and a battery controller. The gradient amplifier supplies electric power to the gradient coil. The battery is charged with electric power that is supplied from the power supply. The detector detects a high power output request on the gradient amplifier. The battery controller controls to supply electric power charged in the battery in addition to electric power supplied from the power supply to the gradient amplifier when the high power output request is detected.Type: ApplicationFiled: June 25, 2014Publication date: October 9, 2014Inventors: Sho KAWAJIRI, Motohisa YOKOI, Motohiro MIURA, Masashi HORI, Kazuyuki SOEJIMA, Naoki IMAMURA, Haruki NAKAMURA
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Publication number: 20140070809Abstract: In one embodiment, an MRI apparatus (20A) includes a data acquisition system (22, 24, 26, 28, 29, 40, 42, 44, 46 and 48), a charge/discharge element (BAT) and a power control unit (52 and 309). The data acquisition system acquires nuclear magnetic resonance signals from an imaging region by performing a scan. The charge/discharge element is a part of an electric power system (304, 308a, 52, BD and BAU) of the MRI apparatus, and is charged with external electric power. The power control unit controls the electric power system in such a manner that at least one unit excluding the data acquisition system is supplied with electric power from the charge/discharge element.Type: ApplicationFiled: October 31, 2013Publication date: March 13, 2014Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBAInventors: Naoki IMAMURA, Motohisa YOKOI, Kazuyuki SOEJIMA, Motohiro MIURA, Sho KAWAJIRI, Haruki NAKAMURA
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Publication number: 20140070812Abstract: In one embodiment, the image diagnosis apparatus (20) generates image data of an object by using external electric power, and includes a charge/discharge element (BA1, . . . BAn) and a charge/discharge control circuit (140, 152). The charge/discharge element is charged with the external electric power and supply a part of the consumed power of the image diagnosis apparatus by discharging. The charge/discharge control circuit controls charge and discharge of the charge/discharge element in such a manner that the charge/discharge element discharges in a period during which the consumed power is larger than a predetermined power amount and the charge/discharge element is charged in a period during which the consumed power is smaller than the predetermined power amount.Type: ApplicationFiled: October 31, 2013Publication date: March 13, 2014Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBAInventors: Motohisa YOKOI, Motohiro MIURA, Sho KAWAJIRI, Kazuyuki SOEJIMA, Haruki NAKAMURA, Naoki IMAMURA
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Publication number: 20130127467Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a mode switching part and an imaging system. The mode switching part is configured to put a circuit system consuming a power into a shutdown state when a first trigger has been detected and put the circuit system being the shutdown state into a startup state when a second trigger has been detected. The first trigger shows that an imaging does not start for a certain period. The second trigger shows that the imaging starts. The imaging system is configured to perform the imaging by using the circuit system being the startup state.Type: ApplicationFiled: November 21, 2012Publication date: May 23, 2013Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, KABUSHIKI KAISHA TOSHIBAInventors: Motohisa YOKOI, Kanta KOBUCHI, Sho KAWAJIRI, Masaaki YAMANAKA, Naoki IMAMURA, Hitoshi KANAZAWA
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Patent number: 8395345Abstract: In opening/closing control for the valve mechanism to which the return torque is applied in an opening direction or a closing direction of the valve, provided are a position control system for outputting a q-axis current command based on a position deviation between a target position command directed to the brushless DC motor and the coarse present position of the motor obtained by using the position detection sensor of a pulse output type, and a current control system in which a virtual current feedback is built for outputting a phase voltage command without a current sensor based on the q-axis current command and the coarse present position of the motor obtained by using the position detection sensor of the pulse output type.Type: GrantFiled: January 12, 2010Date of Patent: March 12, 2013Assignee: Mitsubishi Electric CorporationInventors: Naoki Imamura, Masahiro Iezawa, Satoshi Kawamura, Yoshitaka Onishi
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Publication number: 20110273127Abstract: In opening/closing control for the valve mechanism to which the return torque is applied in an opening direction or a closing direction of the valve, provided are a position control system for outputting a q-axis current command based on a position deviation between a target position command directed to the brushless DC motor and the coarse present position of the motor obtained by using the position detection sensor of a pulse output type, and a current control system in which a virtual current feedback is built for outputting a phase voltage command without a current sensor based on the q-axis current command and the coarse present position of the motor obtained by using the position detection sensor of the pulse output type.Type: ApplicationFiled: January 12, 2010Publication date: November 10, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Naoki Imamura, Masahiro Iezawa, Satoshi Kawamura, Yoshitaka Onishi
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Patent number: 7138736Abstract: An end surface portion 8a of a gear housing 8, which is located on a motor unit 2 side of the gear housing 8, is opposed to the motor unit 2 and laterally extends. A brush holder 10 includes a plate portion 13 that is opposed to the end surface portion 8a. A case 15, which receives the control circuit board 14, is formed separately from the plate portion 13. A receiving through hole, through which the circuit board receiver 15 is receivable, is formed in the plate portion 13. The case 15 is constructed to be positionable next to the yoke 5 in a state where the case 15 is received through the receiving through hole. The yoke 5, the gear housing 8, the brush holder 10, the control circuit board 14 and the case 15 are assembleable in a direction parallel to an axial direction of the motor unit 2.Type: GrantFiled: July 17, 2003Date of Patent: November 21, 2006Assignee: Asmo Co., LtdInventors: Hiroaki Yamamoto, Naoki Imamura, Youichi Matsuyama
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Patent number: 7109617Abstract: A holder-side connecting portion 10c provided on a brush holder 10 and a connector-side connecting portion 16b provided on a connector portion 16 are electrically and mechanically connected with each other. The holder-side connecting portion 10c and the connector-side connecting portion 16b are clamped between a yoke housing 4 and a gear housing 21. For this reason, the connecting portions 10c and 16b for connecting the brush holder 10 and the connector portion 16 are prevented from being externally exposed. As a result, the insulation of the connecting portions 10c and 16b can be secured without complicating the construction of the connecting portions 10c and 16b by applying a special seal or the like to the connecting portions 10c and 16b.Type: GrantFiled: November 12, 2003Date of Patent: September 19, 2006Assignee: ASMO Co., Ltd.Inventors: Nobuo Mizutani, Naoki Imamura
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Publication number: 20060055257Abstract: A holder-side connecting portion 10c provided on a brush holder 10 and a connector-side connecting portion 16b provided on a connector portion 16 are electrically and mechanically connected with each other. The holder-side connecting portion 10c and the connector-side connecting portion 16b are clamped between a yoke housing 4 and a gear housing 21. For this reason, the connecting portions 10c and 16b for connecting the brush holder 10 and the connector portion 16 are prevented from being externally exposed. As a result, the insulation of the connecting portions 10c and 16b can be secured without complicating the construction of the connecting portions 10c and 16b by applying a special seal or the like to the connecting portions 10c and 16b.Type: ApplicationFiled: November 12, 2003Publication date: March 16, 2006Applicant: Asmo Co., LtdInventors: Nobuo Mizutani, Naoki Imamura
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Publication number: 20050082925Abstract: An end surface portion 8a of a gear housing 8, which is located on a motor unit 2 side of the gear housing 8, is opposed to the motor unit 2 and laterally extends. A brush holder 10 includes a plate portion 13 that is opposed to the end surface portion 8a. A case 15, which receives the control circuit board 14, is formed separately from the plate portion 13. A receiving through hole, through which the circuit board receiver 15 is receivable, is formed in the plate portion 13. The case 15 is constructed to be positionable next to the yoke 5 in a state where the case 15 is received through the receiving through hole. The yoke 5, the gear housing 8, the brush holder 10, the control circuit board 14 and the case 15 are assembleable in a direction parallel to an axial direction of the motor unit 2.Type: ApplicationFiled: July 17, 2003Publication date: April 21, 2005Inventors: Hiroaki Yamamoto, Naoki Imamura, Youichi Matsuyama
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Patent number: 6707188Abstract: A rotational sensor of a motor includes a sensor magnet and a sensing element. The sensor magnet is secured to a driving-side rotator of a clutch, which is connected to a rotatable shaft of the motor, to rotate integrally therewith. The sensing element measures a rotational speed of the sensor magnet. Furthermore, the sensing element is secured to a motor case in such a manner that the sensing element opposes the sensor magnet.Type: GrantFiled: April 20, 2001Date of Patent: March 16, 2004Assignee: Asmo Co., Ltd.Inventors: Katsuhiko Torii, Kengo Yamamura, Hiroaki Yamamoto, Naoki Imamura
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Publication number: 20020047347Abstract: A rotational sensor of a motor includes a sensor magnet and a sensing element. The sensor magnet is secured to a driving-side rotator of a clutch, which is connected to a rotatable shaft of the motor, to rotate integrally therewith. The sensing element measures a rotational speed of the sensor magnet. Furthermore, the sensing element is secured to a motor case in such a manner that the sensing element opposes the sensor magnet.Type: ApplicationFiled: April 20, 2001Publication date: April 25, 2002Inventors: Katsuhiko Torii, Kengo Yamamura, Hiroaki Yamamoto, Naoki Imamura
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Patent number: 6229233Abstract: A motor includes a motor section, a one-way clutch and an output section. The motor section includes an armature and armature shaft, and the output section includes a worm mechanism having a worm shaft disposed coaxially with the armature shaft. The one-way clutch is disposed between the armature shaft and the warm shaft. The one-way clutch includes a couple of teeth members in engagement with each other, a plurality of rollers for controlling the teeth members, and a spring holding the rollers. The spring urges the worm shaft to separate from the armature shaft.Type: GrantFiled: March 28, 2000Date of Patent: May 8, 2001Assignee: Asmo Co., Ltd.Inventors: Katsuhiko Torii, Hiroaki Yamamoto, Naoki Imamura
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Patent number: 5303025Abstract: A quantitative analysis of the constituents in a specimen and being classified by the conditions of the constituents in the specimen, using a spectroscopic analysis is made by exciting the specimen a number of times for emission, detecting the light intensity data of the line of the constituent element and the non-constituent element of the specimen per emission, storing the light intensity data of the lines specifying emission which contains the constituent element and the non-constituent element over a predetermined level based on the stored data, and determining that there is present a composition of the constituent element and the non-constituent element at a portion of the specimen corresponding to the specified emission.Type: GrantFiled: March 20, 1992Date of Patent: April 12, 1994Assignee: Shimadzu CorporationInventors: Isao Fukui, Takao Miyama, Naoki Imamura
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Patent number: 4326801Abstract: A method of emission spectrochemical analysis is provided which comprises the steps of producing a predetermined number of spark discharges between an electrode and a specimen containing an element in a first and second state. The intensity of emission of light caused by each of the spark discharges is measured and a frequency distribution of the measured intensities of emission is obtained. The distribution is separated into an area of normal distribution and an area outside the area of normal distribution, and an intensity of emission value is selected. The amount of the element in the first state is determined as a function of the selected intensity of emission multiplied by the area of normal distribution and the amount of the element in the second state is determined as a function of the selected intensity of emission multiplied by the area outside the area of normal distribution.Type: GrantFiled: June 26, 1980Date of Patent: April 27, 1982Assignee: Shimadzu Seisakusho, Ltd.Inventors: Junichi Ono, Isao Fukui, Naoki Imamura