Patents by Inventor Hikaru OTSUKA
Hikaru OTSUKA 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: 20240140910Abstract: The present invention addresses the problem of finding a method for reliably producing (1R,5S)-1-(naphthalen-2-yl)-3-azabicyclo[3.1.0]hexane hydrochloride, wherein crystalline polymorphs can be controlled with industrially easy operations. Provided is a method for producing a crystalline form of (1R,5S)-1-(naphthalen-2-yl)-3-azabicyclo[3.1.0]hexane hydrochloride, the method comprising: step (a) for heating and dissolving (1R,5S)-1-(naphthalen-2-yl)-3-azabicyclo[3.1.0]hexane hydrochloride in a solvent including an alcohol-based solvent; step (b) for cooling the dissolved product of step (a) to a temperature, at which crystals of (1R,5S)-1-(naphthalen-2-yl)-3-azabicyclo[3.1.0]hexane hydrochloride precipitate, to nucleate the crystals; step (c) for heating a mixture containing the crystals obtained by nucleation to a temperature at which only a specific crystalline form selectively remains; and step (d) for cooling the mixture heated in step (c) to obtain the crystalline form.Type: ApplicationFiled: October 15, 2020Publication date: May 2, 2024Inventors: Rei Otsuka, Kimiyoshi Annaka, Hikaru Mitani
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Patent number: 11496036Abstract: A valve device includes a valve, a drive device, and a transmission unit. A valve changes a flow mode of refrigerant that flows in a circulation path of a refrigeration cycle device. The transmission unit includes a driving-side rotary body, a magnetic transmission member, and a driven-side rotary body. The driving-side rotary body includes multiple magnetic magnet poles in a rotational direction. The magnetic transmission member includes multiple magnetic transmission bodies which are configured to be magnetized by the magnetic magnet poles. The driven-side rotary body includes multiple magnetic magnet poles in a rotational direction. The driven-side rotary body rotates in response to a rotary motion of the multiple magnetic magnet poles of the driving-side rotary body via the magnetic transmission body. The number of the magnetic magnet poles and the number of the magnetic transmission bodies are different from each other.Type: GrantFiled: December 2, 2020Date of Patent: November 8, 2022Assignee: DENSO CORPORATIONInventors: Shinji Kawada, Seiji Tateishi, Hikaru Otsuka, Hiroto Inoue, Shin Kuwata, Tetsuya Ito, Shinji Hashimoto
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Publication number: 20210116046Abstract: A valve device includes a valve, a drive device, and a transmission unit. A valve changes a flow mode of refrigerant that flows in a circulation path of a refrigeration cycle device. The transmission unit includes a driving-side rotary body, a magnetic transmission member, and a driven-side rotary body. The driving-side rotary body includes multiple magnetic magnet poles in a rotational direction. The magnetic transmission member includes multiple magnetic transmission bodies which are configured to be magnetized by the magnetic magnet poles. The driven-side rotary body includes multiple magnetic magnet poles in a rotational direction. The driven-side rotary body rotates in response to a rotary motion of the multiple magnetic magnet poles of the driving-side rotary body via the magnetic transmission body. The number of the magnetic magnet poles and the number of the magnetic transmission bodies are different from each other.Type: ApplicationFiled: December 2, 2020Publication date: April 22, 2021Inventors: Shinji KAWADA, Seiji TATEISHI, Hikaru OTSUKA, Hiroto INOUE, Shin KUWATA, Tetsuya ITO, Shinji HASHIMOTO
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Publication number: 20210102635Abstract: A valve device includes a valve, a drive device, a magnet coupling, and a screw mechanism. The valve includes a valve body and changes a flow mode of refrigerant flowing in a circulation path of a refrigeration cycle device. The drive device includes an electric drive unit as a drive source. The magnet coupling includes a driving-side rotary body and a driven-side rotary body that are magnetically connected to each other in a non-contact manner and transmits a rotary motion of the electric drive unit from the driving-side rotary body to the driven-side rotary body. The screw mechanism converts the rotary motion of the driven-side rotary body into an axial linear motion of the valve body. The valve device is configured to change the flow mode of refrigerant by using the linear motion of the valve body caused via the magnet coupling and the screw mechanism in response to the drive of the electric drive unit.Type: ApplicationFiled: December 2, 2020Publication date: April 8, 2021Inventors: Shinji KAWADA, Seiji TATEISHI, Hikaru OTSUKA, Hiroto INOUE, Shin KUWATA, Tetsuya ITO, Shinji HASHIMOTO
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Publication number: 20210086588Abstract: A valve device includes a valve that changes a flow state of refrigerant flowing in a circulation path of a refrigeration cycle device, and a drive device that drives the valve. The drive device includes an electric drive unit that drives the valve, a circuit board having a control circuit that controls a drive of the electric drive unit, and a detector that detects a state of the refrigerant. The electric drive unit, the circuit board and the detector are housed in a housing. The electric drive unit, the circuit board, and the detection body are electrically connected to each other inside the housing.Type: ApplicationFiled: December 3, 2020Publication date: March 25, 2021Inventors: Shinji KAWADA, Seiji TATEISHI, Hikaru OTSUKA, Hiroto INOUE, Shin KUWATA, Tetsuya ITO, Shinji HASHIMOTO
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Publication number: 20210080022Abstract: A valve device includes a valve, a driving device, and a transmission unit. The valve changes a circulation mode of refrigerant flowing through a circulation path of a refrigeration cycle system. The driving device drives the valve. The driving device includes a housing and an electric driving unit as a drive source. The transmission unit is arranged in a driving transmission path extending from the electric driving unit to the valve, and changes a speed of rotation generated by driving of the electric driving unit. The transmission unit is entirely or partially arranged in the housing that is partitioned from the circulation path in a liquid-tight manner.Type: ApplicationFiled: June 5, 2019Publication date: March 18, 2021Applicant: DENSO CORPORATIONInventors: Shinji KAWADA, Seiji TATEISHI, Hikaru OTSUKA, Hiroto INOUE, Shin KUWATA, Tetsuya ITO, Shinji HASHIMOTO
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Patent number: 10574169Abstract: API duty calculation unit of a microcomputer that performs control at a predetermined control period calculates a duty ratio of a voltage applied to a coil of a motor from a target rotation speed and an actual rotation speed calculated by a number-of-rotation information unit. The PI duty calculation unit generates a rectangular wave signal having a period according to one frequency selected from plural predetermined frequencies together with the start of one control period and indicating the calculated duty ratio, and outputs the rectangular wave signal to a PWM duty calculation unit. The PWM duty calculation unit generates a PWM signal for controlling an inverter circuit based on the rectangular wave signal output by the PI duty calculation unit and position information of a rotor of the motor calculated by an electrical angle position information unit.Type: GrantFiled: March 2, 2017Date of Patent: February 25, 2020Assignee: DENSO CORPORATIONInventor: Hikaru Otsuka
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Patent number: 10340771Abstract: A fan motor including: a motor body; a fan; a controller that includes a circuit board and a circuit element; a heat sink that is attached to the controller and that includes a heat dissipating section; a case body that includes a motor holder, and a center piece supporting the stator, with the heat dissipating section disposed between the center piece and the motor holder and the center piece forming an airflow passage along which airflow passes; an introduction section through which airflow flowing toward the heat dissipating section is introduced; a discharge section through which the airflow that has been introduced through the introduction section is discharged toward the fan side; and a facing section that is disposed at a downstream side of the airflow with respect to the heat dissipating section and that extends in a direction to obstruct the airflow.Type: GrantFiled: February 1, 2017Date of Patent: July 2, 2019Assignee: DENSO CORPORATIONInventors: Hikaru Otsuka, Yoshikazu Fujii, Akinori Hiroyama, Hideaki Ishii
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Publication number: 20190089285Abstract: API duty calculation unit of a microcomputer that performs control at a predetermined control period calculates a duty ratio of a voltage applied to a coil of a motor from a target rotation speed and an actual rotation speed calculated by a number-of-rotation information unit. The PI duty calculation unit generates a rectangular wave signal having a period according to one frequency selected from plural predetermined frequencies together with the start of one control period and indicating the calculated duty ratio, and outputs the rectangular wave signal to a PWM duty calculation unit. The PWM duty calculation unit generates a PWM signal for controlling an inverter circuit based on the rectangular wave signal output by the PI duty calculation unit and position information of a rotor of the motor calculated by an electrical angle position information unit.Type: ApplicationFiled: March 2, 2017Publication date: March 21, 2019Applicant: DENSO CORPORATIONInventor: Hikaru OTSUKA
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Publication number: 20170288507Abstract: A fan motor including: a motor body; a fan; a controller that includes a circuit board and a circuit element; a heat sink that is attached to the controller and that includes a heat dissipating section; a case body that includes a motor holder, and a center piece supporting the stator, with the heat dissipating section disposed between the center piece and the motor holder and the center piece forming an airflow passage along which airflow passes; an introduction section through which airflow flowing toward the heat dissipating section is introduced; a discharge section through which the airflow that has been introduced through the introduction section is discharged toward the fan side; and a facing section that is disposed at a downstream side of the airflow with respect to the heat dissipating section and that extends in a direction to obstruct the airflow.Type: ApplicationFiled: February 1, 2017Publication date: October 5, 2017Inventors: Hikaru OTSUKA, Yoshikazu FUJII, Akinori HIROYAMA, Hideaki ISHII
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Publication number: 20150171711Abstract: A motor having an attached circuit device comprises an armature, that includes an armature core and a coil, and a circuit device, that includes a circuit board and a motor-side connector, and that controls current flowing within the coil. The motor-side connector comprises a terminal and a housing. The terminal includes a first connection portion to which a terminal of an external connector is connected and that is treated by plating, a second connection portion that is connected to the circuit board and that is treated by plating with a different material than the plating performed with respect to the first connection portion, and an intermediate portion that connects the first connection portion and the second connection portion together and that is integrally formed with the first connection portion and the second connection portion. The housing is formed using an insulting material so as to embed the intermediate portion therein.Type: ApplicationFiled: December 9, 2014Publication date: June 18, 2015Inventor: Hikaru OTSUKA