Patents by Inventor Jun Nagasawa
Jun Nagasawa 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: 10781826Abstract: An axial fan includes an impeller, a motor, and a housing. The impeller is configured to rotate about a rotation axis extending in a vertical direction; a motor configured to rotationally drive the impeller. The housing is disposed radially outside the impeller and the motor. An inner wall surface of the housing includes a groove recessed radially outward and extending in the vertical direction. At least a first end of the groove in the vertical direction extends to one end of the housing in the vertical direction.Type: GrantFiled: October 24, 2017Date of Patent: September 22, 2020Assignee: NIDEC CORPORATIONInventors: Ryosuke Ishida, Jun Nagasawa
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Patent number: 10734849Abstract: An upper insulator and a lower insulator each include extended portions each extending in a circumferential direction near a radially outer end of a corresponding one of teeth. The teeth are each provided with a coil formed of a conducting wire that is wound around the tooth with the upper insulator and the lower insulator in between. The extended portions of the lower insulator each have a guide portion at an edge on a circumferentially outer and upper side near a region where the conducting wire is led from the upper side toward the lower side when wound into the coil.Type: GrantFiled: May 23, 2018Date of Patent: August 4, 2020Assignee: NIDEC CORPORATIONInventor: Jun Nagasawa
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Publication number: 20190157917Abstract: An upper insulator and a lower insulator each include extended portions each extending in a circumferential direction near a radially outer end of a corresponding one of teeth. The teeth are each provided with a coil formed of a conducting wire that is wound around the tooth with the upper insulator and the lower insulator in between. The extended portions of the lower insulator each have a guide portion at an edge on a circumferentially outer and upper side near a region where the conducting wire is led from the upper side toward the lower side when wound into the coil.Type: ApplicationFiled: May 23, 2018Publication date: May 23, 2019Inventor: Jun NAGASAWA
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Patent number: 10084361Abstract: A motor includes a rotating portion with a shaft extending along a rotation axis and a rotor that rotates together with the shaft, a stationary portion with a stator located radially outside of the rotor and a magnetic sensor located above the rotor to detect a rotational position of the rotor. The rotor includes a rotor core, a rotor magnet located radially outside of the rotor core and under the magnetic sensor, in contact with the rotor core or located opposite to the rotor core with a first gap therebetween. A recessed portion is recessed from each of an upper end surface and an outer circumferential surface of the rotor core. An inner circumferential surface of a lower end portion of the rotor holder is fixed to a radially inner surface of the recessed portion.Type: GrantFiled: September 27, 2017Date of Patent: September 25, 2018Assignee: NIDEC CORPORATIONInventors: Kazuya Kitaji, Jun Nagasawa, Keizo Furukawa
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Publication number: 20180135649Abstract: An axial fan includes an impeller, a motor, and a housing. The impeller is configured to rotate about a rotation axis extending in a vertical direction; a motor configured to rotationally drive the impeller. The housing is disposed radially outside the impeller and the motor. An inner wall surface of the housing includes a groove recessed radially outward and extending in the vertical direction. At least a first end of the groove in the vertical direction extends to one end of the housing in the vertical direction.Type: ApplicationFiled: October 24, 2017Publication date: May 17, 2018Inventors: Ryosuke ISHIDA, Jun NAGASAWA
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Publication number: 20180019645Abstract: A motor includes a rotating portion with a shaft extending along a rotation axis and a rotor that rotates together with the shaft, a stationary portion with a stator located radially outside of the rotor and a magnetic sensor located above the rotor to detect a rotational position of the rotor. The rotor includes a rotor core, a rotor magnet located radially outside of the rotor core and under the magnetic sensor, in contact with the rotor core or located opposite to the rotor core with a first gap therebetween. A recessed portion is recessed from each of an upper end surface and an outer circumferential surface of the rotor core. An inner circumferential surface of a lower end portion of the rotor holder is fixed to a radially inner surface of the recessed portion.Type: ApplicationFiled: September 27, 2017Publication date: January 18, 2018Inventors: Kazuya KITAJI, Jun NAGASAWA, Keizo FURUKAWA
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Patent number: 9812932Abstract: A motor includes a rotating portion including a shaft and a rotor, and a stationary portion including a stator and a magnetic sensor. The magnetic sensor is located above the rotor to detect the rotational position of the rotor. The rotor includes a tubular rotor core defined by laminated steel sheets; a rotor magnet including an upper end surface at an axial level higher than an axial level of an upper end surface of the rotor core; and a rotor holder including a ferromagnetic body, and above the rotor core and radially inside of the rotor magnet. Each of the rotor core and an outer cylindrical portion of the rotor holder is in contact with the rotor magnet or opposite to the rotor magnet with a gap intervening therebetween.Type: GrantFiled: April 20, 2015Date of Patent: November 7, 2017Assignee: NIDEC CORPORATIONInventors: Kazuya Kitaji, Jun Nagasawa, Keizo Furukawa
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Patent number: 9692270Abstract: A motor includes a shaft, an annular rotor magnet, an armature arranged to cover the rotor magnet, an upper bracket fixed to an axial upper portion of the armature, and a lower bracket fixed to an axial lower portion of the armature. The armature includes an annular core-back, a plurality of magnetic pole teeth protruding radially inward from the core-back, an insulator arranged to cover the magnetic pole teeth, and a coil wound around the magnetic pole teeth through the insulator. The insulator includes an annular core-back insulating portion arranged radially outward of the coil and extended axially upward. The upper bracket is fixed by a plurality of fixing members positioned radially inward of an outer circumferential surface of the core-back.Type: GrantFiled: October 29, 2013Date of Patent: June 27, 2017Assignee: NIDEC CORPORATIONInventors: Keizo Furukawa, Nobuyuki Iwashita, Jun Nagasawa
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Publication number: 20150381017Abstract: A motor includes a rotating portion including a shaft and a rotor, and a stationary portion including a stator and a magnetic sensor. The magnetic sensor is located above the rotor to detect the rotational position of the rotor. The rotor includes a tubular rotor core defined by laminated steel sheets; a rotor magnet including an upper end surface at an axial level higher than an axial level of an upper end surface of the rotor core; and a rotor holder including a ferromagnetic body, and above the rotor core and radially inside of the rotor magnet. Each of the rotor core and an outer cylindrical portion of the rotor holder is in contact with the rotor magnet or opposite to the rotor magnet with a gap intervening therebetween.Type: ApplicationFiled: April 20, 2015Publication date: December 31, 2015Inventors: Kazuya KITAJI, Jun NAGASAWA, Keizo FURUKAWA
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Publication number: 20140132122Abstract: A motor includes a shaft, an annular rotor magnet, an armature arranged to cover the rotor magnet, an upper bracket fixed to an axial upper portion of the armature, and a lower bracket fixed to an axial lower portion of the armature. The armature includes an annular core-back, a plurality of magnetic pole teeth protruding radially inward from the core-back, an insulator arranged to cover the magnetic pole teeth, and a coil wound around the magnetic pole teeth through the insulator. The insulator includes an annular core-back insulating portion arranged radially outward of the coil and extended axially upward. The upper bracket is fixed by a plurality of fixing members positioned radially inward of an outer circumferential surface of the core-back.Type: ApplicationFiled: October 29, 2013Publication date: May 15, 2014Applicant: NIDEC CORPORATIONInventors: Keizo FURUKAWA, Nobuyuki IWASHITA, Jun NAGASAWA
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Patent number: 7781703Abstract: The thermal analyzer comprises temperature deviation approximation formula holder which holds an approximate formula of a temperature deviation between sample and furnace and an elevating or lowering rate of the temperature of furnace during measuring the temperature deviation, programmed temperature corrector which corrects a programmed temperature in proportion to the elevating or lowering rate of the temperature. So that, since the temperature deviation is corrected in proportion to the elevating or lowering rate of the temperature program, the temperature deviation between sample and furnace is controlled to diminish when heating or cooling the sample using the temperature program which elevates or lowers the temperature of the sample or the furnace.Type: GrantFiled: June 1, 2007Date of Patent: August 24, 2010Assignee: SII NanoTechnology Inc.Inventor: Jun Nagasawa
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Publication number: 20080000402Abstract: The thermal analyzer comprises temperature deviation approximation formula holder which holds an approximate formula of a temperature deviation between sample and furnace and an elevating or lowering rate of the temperature of furnace during measuring the temperature deviation, programmed temperature corrector which corrects a programmed temperature in proportion to the elevating or lowering rate of the temperature. So that, since the temperature deviation is corrected in proportion to the elevating or lowering rate of the temperature program, the temperature deviation between sample and furnace is controlled to diminish when heating or cooling the sample using the temperature program which elevates or lowers the temperature of the sample or the furnace.Type: ApplicationFiled: June 1, 2007Publication date: January 3, 2008Inventor: Jun Nagasawa
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Publication number: 20060004839Abstract: A data processing method in a database management system having a main database and a sub database, for generating the sub database by utilizing log information generated by a data operation of the main database utilizing a transaction processing. When a checkpoint as a recovery timing of the database in the transaction processing is detected, the data operation based on the log information generated before the checkpoint is processed for the sub database. Replication from the main database to the sub database is accomplished in this way. Whenever the checkpoint is detected, a data operation is executed for the sub database based on the log information generated from a checkpoint immediately before the checkpoint detected to the checkpoint detected and replication from the main database to the sub database is accomplished.Type: ApplicationFiled: September 2, 2004Publication date: January 5, 2006Inventors: Jun Nagasawa, Nobuo Kawamura
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Patent number: 6948356Abstract: A viscoelasticity measuring instrument for measuring a viscoelasticity of a sample has a temperature detection control unit for obtaining, prior to a practical measurement operation, a measurement executable temperature range for the sample by an experimental temperature control operation and application of AC power. A main measurement control unit carries out a viscoelasticity measurement operation within the temperature range obtained by the temperature detection control unit.Type: GrantFiled: August 6, 2004Date of Patent: September 27, 2005Assignee: SII NanoTechnology Inc.Inventors: Nobuaki Okubo, Jun Nagasawa
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Publication number: 20050195161Abstract: There is provided a user interface capable of effectively inputting a desired numerical value only by using a pointing device such as mouse, without using a keyboard. It possesses a key input area in which the numerical value is input by a keyboard, and a mouse input area which is connected with the key input area and in which a coordinate axis expressing the input range of that key input area has been displayed, and which has been configured so that, if a point on the coordinate axis of the mouse input area is specified by the pointing device such as a mouse, the coordinate value of that specified point is inputted to the key input area.Type: ApplicationFiled: March 7, 2005Publication date: September 8, 2005Inventor: Jun Nagasawa
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Publication number: 20050126267Abstract: A viscoelasticity measuring instrument for measuring a viscoelasticity of a sample has a temperature detection control unit for obtaining, prior to a practical measurement operation, a measurement executable temperature range for the sample by an experimental temperature control operation and application of AC power. A main measurement control unit carries out a viscoelasticity measurement operation within the temperature range obtained by the temperature detection control unit.Type: ApplicationFiled: August 6, 2004Publication date: June 16, 2005Inventors: Nobuaki Okubo, Jun Nagasawa
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Patent number: 6901349Abstract: An analysis apparatus has a measurement head for measuring characteristics of a sample, a calibration conditions file comprising at least one calibration condition obtained by carrying out device calibration for the measurement head in advance, and a measurement head controller for designating one of the calibration conditions within the calibration conditions file. Measurement sequence data comprised of a sequence of measurement steps has measurement conditions for carrying out measurements by the measurement head and the calibration conditions designated by the measurement head controller. A measurement device refers to each measurement step of the measurement sequence data and carries out measurement after inputting the measurement conditions and the calibration conditions for each measurement step to the measurement head.Type: GrantFiled: August 20, 2003Date of Patent: May 31, 2005Assignee: SII NanoTechnology Inc.Inventor: Jun Nagasawa
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Publication number: 20040059507Abstract: In order to provide an analysis apparatus capable of designating arbitrary calibration conditions for each measurement when a plurality of types of measurement are carried out using an autosampler etc., there is provided a measurement head 10 for measuring sample characteristics; storage means 23 for storing calibration conditions made by performing device calibration in advance; a measurement sequence 22 capable of setting calibration conditions used in each measurement step; designation means 21 for designating calibration conditions for each measurement step; and measurement control means for controlling a series of measurements in accordance with a measurement sequence, for carrying out measurement after first setting calibration conditions designated for each measurement step at the measurement head when executing each measurement step.Type: ApplicationFiled: August 20, 2003Publication date: March 25, 2004Inventor: Jun Nagasawa
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Patent number: 6632015Abstract: With input compensation-type differential scanning calorimeters of the related art, the power supplied fluctuated even with non-endothermic reference materials, and the reference material side temperature therefore also fluctuated. Mutual interference between feedback loops also made precise temperature control difficult. In the present invention, power supplied to the sample side is changed to compensate for a temperature difference between the sample side and the reference material side using a differential thermal feedback loop, power to be supplied to the reference material side heater to make the reference material side temperature correspond to the program temperature is controlled, and the same amount of the power is also supplied to the sample side with the average temperature feedback loop.Type: GrantFiled: April 18, 2001Date of Patent: October 14, 2003Assignee: Seiko Instruments Inc.Inventor: Jun Nagasawa
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Publication number: 20020097271Abstract: A user interface for creating a printing template of the present invention comprises a paper stage showing a printing paper and an item list displaying a list of items possible to be arranged on the paper stage, as well as having a function of grouping a plurality of items selected from the item list and a function of group editing such as performing character position alignment of the contents in the grouped items.Type: ApplicationFiled: January 15, 2002Publication date: July 25, 2002Inventor: Jun Nagasawa