Patents by Inventor Akira Niwa
Akira Niwa 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: 10298098Abstract: A power tool includes a stator having a coil, a sensor circuit board attached to the stator and on which a magnetic sensor is provided, the sensor circuit board having a first side facing the stator and a second side opposite the first side, a rotor configured to rotate with respect to the stator, a tool-accessory retaining part configured to be driven by the rotor and a power-supply line configured to supply electrical power to the coil. The power-supply line is connected to the coil without traversing the second side of the sensor circuit board.Type: GrantFiled: May 9, 2016Date of Patent: May 21, 2019Assignee: MAKITA CORPORATIONInventor: Akira Niwa
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Patent number: 10270316Abstract: An electric power tool includes a housing, a commutator motor housed in the housing, and a brush holder disposed in the housing. A fan is disposed to the commutator motor. The brush holder includes a metal sleeve and a resin base. The metal sleeve houses a brush, and the resin base holds the metal sleeve at one surface side of the resin base. The resin base includes an opening portion exposing the metal sleeve to the opposite side surface of the one surface side. The brush holder is disposed in a direction that the resin base is disposed at the fan side such that rotation of the fan causes air suctioned from an air intake opening disposed in the housing at the metal sleeve side to be discharged from an exhaust outlet disposed in the housing at the fan side after passing through the brush holder and a commutator.Type: GrantFiled: December 7, 2015Date of Patent: April 23, 2019Assignee: MAKITA CORPORATIONInventor: Akira Niwa
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Patent number: 10193422Abstract: A power tool, such as a hammer driver-drill (1), includes a brushless motor (8) having a stator (9) and a rotor (10). The stator (9) has slots (78) between teeth (63) that protrude inwardly. Coils (64) are respectively wound around each tooth (63) and the coils (64) of all phases are delta-connected in series. The rotor (10) includes permanent magnets (68) and is rotatably disposed in the interior of the stator (9). A sensor circuit board (65) is fixed to the stator (9) and includes magnetic sensors (66) that detect the rotational position of the rotor (10). The magnetic sensors (66) are provided at locations that correspond at least substantially to the centers of the slots (78) in the rotational direction of the rotor (10).Type: GrantFiled: April 22, 2016Date of Patent: January 29, 2019Assignee: MAKITA CORPORATIONInventors: Kei Kouda, Akira Niwa
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Publication number: 20180208893Abstract: Provided is a method for producing vascular endothelial cells from pluripotent stem cells, the method comprising the following steps (i) to (iii): (i) a step of culturing pluripotent stem cells in a culture medium comprising a BMP, on a culture vessel coated with a first matrix, to produce mesodermal progenitor cells; (ii) a step of dissociating the resulting cells into single cells; and (iii) a step of culturing the resulting cells in a culture medium comprising VEGF, on a culture vessel coated with a second matrix selected from the group consisting of laminin-411 or a fragment thereof, laminin-511 or a fragment thereof, Matrigel, type IV collagen and fibronectin.Type: ApplicationFiled: July 14, 2016Publication date: July 26, 2018Inventors: Tatsutoshi Nakahata, Megumu Saito, Akira Niwa, Ryo Ota, Kiyotoshi Sekiguchi
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Publication number: 20180034354Abstract: In a brushless motor comprising a stator core having a plurality of teeth that protrude therefrom in radial directions, a front insulator which is attached to the stator core and which has a plurality of insulating portions that protrude therefrom along the direction of protrusion of the respective teeth, and a plurality of coils formed by magnet wire wound about each of the insulating portions at the respective teeth, a top face of the respective insulating portions of the front insulator is provided in advance with a deformable rib which is capable of being deformed by tension of the magnet wire wound thereabout, and the magnet wire is wound about the deformable rib to form the coils as the deformable rib is made to deform in correspondence to the external shape of the magnet wire.Type: ApplicationFiled: May 31, 2017Publication date: February 1, 2018Applicant: MAKITA CORPORATIONInventor: Akira NIWA
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Publication number: 20180029148Abstract: A covering member made of a resin is integrally molded with a sensor substrate of a brushless motor in a circular saw by low-temperature, low-pressure injection molding. The covering member covers rotation detecting elements, a thermistor, resistors, and connecting portions (terminals) of lead wires that serve as electrically conductive portions conducting electric currents.Type: ApplicationFiled: June 23, 2017Publication date: February 1, 2018Applicant: MAKITA CORPORATIONInventors: Ryosuke SUZUKI, Akira NIWA
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Publication number: 20170351081Abstract: An observation system includes a microscope optical system, an image pickup unit, an image pickup control unit, a detection unit, and an observation control unit. The image pickup unit is configured to take an image of a field-of-view range of the microscope optical system. The image pickup control unit is configured to cause the image pickup unit to take images of an observation sample in the field-of-view range at a plurality of focal positions and generate detection images. The detection unit is configured to detect a three-dimensional position of an observation target object in the observation sample from the detection images. The observation control unit is configured to fit the field-of-view range of the microscope optical system to the three-dimensional position.Type: ApplicationFiled: August 23, 2017Publication date: December 7, 2017Inventors: Suguru DOWAKI, Shiori OSHIMA, Eriko MATSUI, Tatsutoshi NAKAHATA, Megumu SAITO, Akira NIWA
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Publication number: 20170317548Abstract: An electric power tool is configured to drive a tool bit. The electric power tool includes a motor that includes a stator and a rotor. The stator includes a cylindrical stator core that includes an inner peripheral side with a slot, a first insulator and a second insulator installed on respective both end surfaces of the stator core, and a coil wound around the slot of the stator core via the first insulator and the second insulator. The rotor is rotatable with respect to the stator. The rotor includes a rotor core and a rotation shaft. The first insulator overlaps with the second insulator in the slot in an axial direction of the stator core.Type: ApplicationFiled: April 12, 2017Publication date: November 2, 2017Applicant: MAKITA CORPORATIONInventors: Ryosuke SUZUKI, Akira NIWA
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Patent number: 9753267Abstract: An observation system includes a microscope optical system, an image pickup unit, an image pickup control unit, a detection unit, and an observation control unit. The image pickup unit is configured to take an image of a field-of-view range of the microscope optical system. The image pickup control unit is configured to cause the image pickup unit to take images of an observation sample in the field-of-view range at a plurality of focal positions and generate detection images. The detection unit is configured to detect a three-dimensional position of an observation target object in the observation sample from the detection images. The observation control unit is configured to fit the field-of-view range of the microscope optical system to the three-dimensional position.Type: GrantFiled: April 30, 2014Date of Patent: September 5, 2017Assignees: Sony Corporation, Kyoto UniversityInventors: Suguru Dowaki, Shiori Oshima, Eriko Matsui, Tatsutoshi Nakahata, Megumu Saito, Akira Niwa
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Publication number: 20170130202Abstract: The present invention aims to provide a novel method for producing mesodermal cells, and a graft material containing mesodermal cells obtained by this method. The present invention also aims to provide a novel method for producing hematopoietic cells, and a therapeutic agent for blood diseases containing a hematopoietic cell obtained by the method. These objects can be achieved by providing a novel method for producing mesodermal cells and/or hematopoietic cells, which method includes culturing pluripotent stem cells in contact with a three-dimensional support.Type: ApplicationFiled: June 24, 2015Publication date: May 11, 2017Inventors: Tatsutoshi Nakahata, Megumu Saito, Akira Niwa, Yoshinori Sugimine
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Publication number: 20160380510Abstract: A power tool includes a stator having a coil, a sensor circuit board attached to the stator and on which a magnetic sensor is provided, the sensor circuit board having a first side facing the stator and a second side opposite the first side, a rotor configured to rotate with respect to the stator, a tool-accessory retaining part configured to be driven by the rotor and a power-supply line configured to supply electrical power to the coil. The power-supply line is connected to the coil without traversing the second side of the sensor circuit board.Type: ApplicationFiled: May 9, 2016Publication date: December 29, 2016Inventor: Akira NIWA
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Patent number: 9499789Abstract: A dendritic cell is produced from pluripotent stem cells by culturing pluripotent stem cells by the following steps: (1) performing adherent culture in a medium which comprises a BMP family protein but does not comprise serum; (2) performing adherent culture in a medium which comprises VEGF but does not comprise serum; (3) performing adherent culture in a medium which comprises a hematopoietic factor but does not comprise serum; and (4) performing suspension culture in a medium which does not comprise serum.Type: GrantFiled: February 23, 2012Date of Patent: November 22, 2016Assignee: KYOTO UNIVERSITYInventors: Tatsutoshi Nakahata, Megumu Saito, Akira Niwa, Masakatsu Yanagimachi
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Publication number: 20160336838Abstract: A power tool, such as a hammer driver-drill (1), includes a brushless motor (8) having a stator (9) and a rotor (10). The stator (9) has slots (78) between teeth (63) that protrude inwardly. Coils (64) are respectively wound around each tooth (63) and the coils (64) of all phases are delta-connected in series. The rotor (10) includes permanent magnets (68) and is rotatably disposed in the interior of the stator (9). A sensor circuit board (65) is fixed to the stator (9) and includes magnetic sensors (66) that detect the rotational position of the rotor (10). The magnetic sensors (66) are provided at locations that correspond at least substantially to the centers of the slots (78) in the rotational direction of the rotor (10).Type: ApplicationFiled: April 22, 2016Publication date: November 17, 2016Inventors: Kei KOUDA, Akira NIWA
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Publication number: 20160226339Abstract: A power tool (1) includes a brushless motor (8) having a stator (9) and a rotor (10). The stator (9) includes: a tubular stator core (60); front and rear insulators (61, 62) fixed to the stator core; and coils (64), which are wound around a plurality of teeth (63) on the stator core. The rotor (10) includes: a rotor core (67) disposed within the stator; a rotary shaft (11) fixed to the rotor core; and one or more permanent magnets (68) fixed to the rotor core. A sensor-circuit board (65) detects the position(s) of the permanent magnet(s) and is fixed to the stator. One or more notched parts (91) is/are formed, in an outer circumference of the sensor-circuit board, between circumferentially-adjacent teeth in an axial direction of the stator. The notch part(s) allow(s) air for cooling the brushless motor to pass more easily through the interior of the stator.Type: ApplicationFiled: January 21, 2016Publication date: August 4, 2016Inventors: Akira NIWA, Kei KOUDA
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Publication number: 20160211730Abstract: An electric power tool includes a housing, a commutator motor housed in the housing, and a brush holder disposed in the housing. A fan is disposed to the commutator motor. The brush holder includes a metal sleeve and a resin base. The metal sleeve houses a brush, and the resin base holds the metal sleeve at one surface side of the resin base. The resin base includes an opening portion exposing the metal sleeve to the opposite side surface of the one surface side. The brush holder is disposed in a direction that the resin base is disposed at the fan side such that rotation of the fan causes air suctioned from an air intake opening disposed in the housing at the metal sleeve side to be discharged from an exhaust outlet disposed in the housing at the fan side after passing through the brush holder and a commutator.Type: ApplicationFiled: December 7, 2015Publication date: July 21, 2016Applicant: MAKITA CORPORATIONInventor: Akira NIWA
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Publication number: 20140333723Abstract: An observation system includes a microscope optical system, an image pickup unit, an image pickup control unit, a detection unit, and an observation control unit. The image pickup unit is configured to take an image of a field-of-view range of the microscope optical system. The image pickup control unit is configured to cause the image pickup unit to take images of an observation sample in the field-of-view range at a plurality of focal positions and generate detection images. The detection unit is configured to detect a three-dimensional position of an observation target object in the observation sample from the detection images. The observation control unit is configured to fit the field-of-view range of the microscope optical system to the three-dimensional position.Type: ApplicationFiled: April 30, 2014Publication date: November 13, 2014Applicants: Sony Corporation, Kyoto UniversityInventors: Suguru DOWAKI, Shiori OSHIMA, Eriko MATSUI, Tatsutoshi NAKAHATA, Megumu SAITO, Akira NIWA
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Patent number: 8736824Abstract: A blood analysis apparatus includes an analysis section. The analysis section is configured to compare a measurement spectrum obtained regarding red blood cells with a standard spectrum of heme, biliverdin, and bilirubin, and cause the measurement spectrum to belong to any one of the standard spectra.Type: GrantFiled: July 30, 2012Date of Patent: May 27, 2014Assignees: Sony Corporation, Kyoto UniversityInventors: Eriko Matsui, Suguru Dowaki, Hirokazu Tatsuta, Takeshi Kunihiro, Akira Niwa, Megumu Saito, Tatsutoshi Nakahata
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Patent number: 8652845Abstract: The present invention provides a method for inducing differentiation of pluripotent stem cells into mesodermal cells, comprising the step of culturing pluripotent stem cells in a serum-free medium without forming an embryoid body and without coculturing with cells from a different species.Type: GrantFiled: March 18, 2011Date of Patent: February 18, 2014Assignee: Kyoto UniversityInventors: Akira Niwa, Tatsutoshi Nakahata, Toshio Heike
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Publication number: 20130330822Abstract: A dendritic cell is produced from pluripotent stem cells by culturing pluripotent stem cells by the following steps: (1) performing adherent culture in a medium which comprises a BMP family protein but does not comprise serum; (2) performing adherent culture in a medium which comprises VEGF but does not comprise serum; (3) performing adherent culture in a medium which comprises a hematopoietic factor but does not comprise serum; and (4) performing suspension culture in a medium which does not comprise serum.Type: ApplicationFiled: February 23, 2012Publication date: December 12, 2013Applicant: KYOTO UNIVERSITYInventors: Tatsutoshi Nakahata, Megumu Saito, Akira Niwa, Masakatsu Yanagimachi
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Publication number: 20130038860Abstract: A blood analysis apparatus includes an analysis section. The analysis section is configured to compare a measurement spectrum obtained regarding red blood cells with a standard spectrum of heme, biliverdin, and bilirubin, and cause the measurement spectrum to belong to any one of the standard spectra.Type: ApplicationFiled: July 30, 2012Publication date: February 14, 2013Applicants: KYOTO UNIVERSITY, SONY CORPORATIONInventors: Eriko Matsui, Suguru Dowaki, Hirokazu Tatsuta, Takeshi Kunihiro, Akira Niwa, Megumu Saito, Tatsutoshi Nakahata