Patents by Inventor Hirofumi Higashi
Hirofumi Higashi 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: 11971045Abstract: A drive support unit of a turbo compressor includes at least one bearingless motor. The at least one bearingless motor includes a rotor-stator pair constituted by a rotor and a stator, and is configured to rotationally drive a drive shaft and to support a radial load of the drive shaft in a contactless manner. Accordingly, it is possible to provide a turbo compressor to which a bearingless motor is applied.Type: GrantFiled: May 8, 2018Date of Patent: April 30, 2024Assignee: Daikin Industries, Ltd.Inventors: Yuji Nakazawa, Atsushi Sakawaki, Hirofumi Higashi, Taiichi Nose, Takaaki Ono, Yusuke Irino
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Publication number: 20240026886Abstract: A compressor includes a first-stage compression unit configured to compress a refrigerant, a second-stage compression unit configured to compress the refrigerant compressed by the first-stage compression unit, a shaft member connected to the first-stage compression unit and the second-stage compression unit, and a cover member configured to cover the shaft member. A first passage is provided between the first-stage compression unit and the second-stage compression unit. A front chamber is provided around the cover member. The front chamber is connected to the first passage and to a second passage to which the refrigerant from an economizer is sent. The second passage is provided with a passage structure configured such that a flowing direction of the refrigerant supplied through the second passage to the front chamber is an avoidance direction. The avoidance direction is a direction that differs from a direction toward the shaft member.Type: ApplicationFiled: September 28, 2023Publication date: January 25, 2024Inventors: Taiichi NOSE, Hirofumi HIGASHI
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Patent number: 11835044Abstract: A rotary compressor includes a first cylinder, a first piston and a drive shaft. The drive shaft includes a first eccentric portion, a first shaft portion rotatably supported by a first bearing, and a first coupling portion coupling the first shaft portion with the first eccentric portion. The first piston is fitted to the first eccentric portion. The first shaft portion has a cylindrical shape coaxial with the rotational center axis. Re1?e1<R1. Re1 is a radius of the first eccentric portion. R1 is a radius of the first shaft portion. e1 is an eccentricity of the first eccentric portion. An outer surface of the first coupling portion does not extend radially out of an outer surface of the first eccentric portion. The first coupling portion includes a reinforcement portion with an outer surface positioned radially outside an outer surface of the first shaft portion.Type: GrantFiled: August 3, 2018Date of Patent: December 5, 2023Assignee: Daikin Industries, Ltd.Inventors: Takazou Sotojima, Hirofumi Higashi, Kousuke Nishimura
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Patent number: 11473581Abstract: A rotary compressor includes a first cylinder, a first piston and a drive shaft. The drive shaft includes a first eccentric portion, a first shaft portion rotatably supported by a first bearing, and a first coupling portion coupling the first shaft portion with the first eccentric portion. The first piston is fitted to the first eccentric portion. The first shaft portion has a cylindrical shape coaxial with the rotational center axis. Re1?e1<R1. Re1 is a radius of the first eccentric portion. R1 is a radius of the first shaft portion. e1 is an eccentricity of the first eccentric portion. An outer surface of the first coupling portion does not extend radially out of the outer surface of the first eccentric portion. A circumferentially extending groove is formed at an end of an inner peripheral surface of the first piston on a first coupling portion side in the axial direction of the drive shaft.Type: GrantFiled: August 3, 2018Date of Patent: October 18, 2022Assignee: Daikin Industries, Ltd.Inventors: Takazou Sotojima, Kousuke Nishimura, Hirofumi Higashi
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Publication number: 20210399597Abstract: An electric motor includes a stator, and a rotor having a plurality of magnetic poles. Each magnetic pole includes a rotor core having through holes arranged circumferentially side by side, and a permanent magnet inserted into each through hole. A length of a portion of the rotor core in a radial direction of the rotor is shorter than a length of the permanent magnet in the radial direction of the rotor. The length of the portion of the rotor core is measured between an inner surface of each of the through holes adjacent to an outer periphery of the rotor and an outer peripheral surface of the rotor. The permanent magnets generate a magnetic flux in a magnetic circuit showing a smaller magnetic resistance in a portion of the rotor radially outward of the permanent magnets than in a portion of the rotor radially inward of the permanent magnets.Type: ApplicationFiled: September 1, 2021Publication date: December 23, 2021Inventors: Tatsuya TONARI, Hisato SUMITOMO, Yuji NAKAZAWA, Taiichi NOSE, Hirofumi HIGASHI
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Publication number: 20210115929Abstract: A drive support unit of a turbo compressor includes at least one bearingless motor. The at least one bearingless motor includes a rotor-stator pair constituted by a rotor and a stator, and is configured to rotationally drive a drive shaft and to support a radial load of the drive shaft in a contactless manner. Accordingly, it is possible to provide a turbo compressor to which a bearingless motor is applied.Type: ApplicationFiled: May 8, 2018Publication date: April 22, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yuji NAKAZAWA, Atsushi SAKAWAKI, Hirofumi HIGASHI, Taiichi NOSE, Takaaki ONO, Yusuke IRINO
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Publication number: 20200200173Abstract: A rotary compressor includes a first cylinder, a first piston and a drive shaft. The drive shaft includes a first eccentric portion, a first shaft portion rotatably supported by a first bearing, and a first coupling portion coupling the first shaft portion with the first eccentric portion. The first piston is fitted to the first eccentric portion. The first shaft portion has a cylindrical shape coaxial with the rotational center axis. Re1?e1<R1. Re1 is a radius of the first eccentric portion. R1 is a radius of the first shaft portion. e1 is an eccentricity of the first eccentric portion. An outer surface of the first coupling portion does not extend radially out of an outer surface of the first eccentric portion. The first coupling portion includes a reinforcement portion with an outer surface positioned radially outside an outer surface of the first shaft portion.Type: ApplicationFiled: August 3, 2018Publication date: June 25, 2020Inventors: Takazou SOTOJIMA, Hirofumi HIGASHI, Kousuke NISHIMURA
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Publication number: 20200200176Abstract: A rotary compressor includes a first cylinder, a first piston and a drive shaft. The drive shaft includes a first eccentric portion, a first shaft portion rotatably supported by a first bearing, and a first coupling portion coupling the first shaft portion with the first eccentric portion. The first piston is fitted to the first eccentric portion. The first shaft portion has a cylindrical shape coaxial with the rotational center axis. Re1?e1<R1. Re1 is a radius of the first eccentric portion. R1 is a radius of the first shaft portion. e1 is an eccentricity of the first eccentric portion. An outer surface of the first coupling portion does not extend radially out of the outer surface of the first eccentric portion. A circumferentially extending groove is formed at an end of an inner peripheral surface of the first piston on a first coupling portion side in the axial direction of the drive shaft.Type: ApplicationFiled: August 3, 2018Publication date: June 25, 2020Inventors: Takazou SOTOJIMA, Kousuke NISHIMURA, Hirofumi HIGASHI
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Patent number: 10477290Abstract: A loudspeaker device includes a loudspeaker unit and an enclosure. The loudspeaker unit outputs sounds mainly in a first direction, upon receiving an electric signal. The enclosure is configured with at least a part of an interior member of a movable-body device, and secures and accommodates the loudspeaker unit in the inside of the enclosure. The interior member includes a body part, and an accommodation part that accommodates the loudspeaker unit therein and is formed integrally with the body part. The accommodation part is larger in dimension along the first direction than the body part.Type: GrantFiled: April 6, 2018Date of Patent: November 12, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Ryo Kuribayashi, Takayumi Daikoku, Tetsushi Itano, Hirofumi Higashi, Hiroyuki Morimoto, Yohei Jin
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Publication number: 20180310084Abstract: A loudspeaker device includes a loudspeaker unit and an enclosure. The loudspeaker unit outputs sounds mainly in a first direction, upon receiving an electric signal. The enclosure is configured with at least a part of an interior member of a movable-body device, and secures and accommodates the loudspeaker unit in the inside of the enclosure. The interior member includes a body part, and an accommodation part that accommodates the loudspeaker unit therein and is formed integrally with the body part. The accommodation part is larger in dimension along the first direction than the body part.Type: ApplicationFiled: April 6, 2018Publication date: October 25, 2018Inventors: RYO KURIBAYASHI, TAKAYUMI DAIKOKU, TETSUSHI ITANO, HIROFUMI HIGASHI, HIROYUKI MORIMOTO, YOHEI JIN
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Patent number: 9574495Abstract: A variable compression ratio device for an internal combustion engine includes: a connecting rod, having a small end and a large end, wherein a support hole formed at the small end is pivotally supported by a support shaft of a piston that reciprocates in a cylinder, and a support hole formed at the large end is pivotally supported by a support shaft of a crankshaft; an eccentric sleeve that is rotatably installed between the support hole of the small end or the support hole of the large end and the support shaft, and displaces a center axis of the support hole of the small end or a center axis of the support hole of the large end with respect to a center axis the support shaft; and an actuator that drives and rotates the eccentric sleeve.Type: GrantFiled: December 23, 2014Date of Patent: February 21, 2017Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Mitsubishi Jidosha Engineering Kabushiki KaishaInventors: Seiji Matsuda, Hirofumi Higashi, Akira Mikita
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Patent number: 9564474Abstract: A method of manufacturing a thin film transistor (TFT) substrate in which a TFT including an oxide semiconductor layer is formed, the method including: forming an insulating layer to cover the oxide semiconductor layer; and forming an opening in the insulating layer, wherein the insulating layer includes a first film, a second film which is provided above the first film and is an aluminum oxide film, and a third film which is provided above the second film and is a film including silicon, and the forming of an opening includes: forming a resist pattern above the third film; processing the third film by dry etching; and processing the second film by wet etching.Type: GrantFiled: June 19, 2013Date of Patent: February 7, 2017Assignee: JOLED INC.Inventors: Atsushi Sasaki, Eiichi Satoh, Hirofumi Higashi
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Patent number: 9546733Abstract: This invention provides a piston in which the moving piston unit can be prevented from rotating with respect the base piston unit, while suppressing the increase of the sliding resistance the piston has with respect to the cylinder. The circumferential wall of the moving piston unit has a pair of skirt parts opposing each other across a piston boss and a pair of side-wall parts coupling the skirt parts and each having an outer circumferential surface concaved toward the central axis X1 of the piston. The side-wall parts have a penetration part each, which penetrates the side-wall part and extends in the directions the moving piston unit reciprocates with respect to the base piston unit. The base piston unit has rotation preventing projections that project perpendicular to the central axis of the piston and are inserted into the penetration parts.Type: GrantFiled: December 22, 2011Date of Patent: January 17, 2017Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Kazushi Miyamoto, Hirofumi Higashi, Jun Hoshikawa, Akihiro Fujimoto, Noritsugu Ohsawa, Kiminari Kato, Seiji Matsuda
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Patent number: 9512842Abstract: A high pressure dome type rotary compressor including a casing and a compression mechanism disposed in the casing to compress gas in a cylinder chamber. The compression mechanism has a discharge port and a discharge valve. The discharge valve is opened in a discharge process and is closed during a period from when the discharge process is finished to when a next compression process is started. The compressor is arranged such that high pressure gas discharged from the discharge port in the discharge process is discharged outside the casing through space in the casing. An oil feed path is arranged to feed lubricant oil contained in a bottom of the casing to an inside of the discharge port in a period from a point in time in the discharge process to when the compression process is started.Type: GrantFiled: June 15, 2010Date of Patent: December 6, 2016Assignee: Daikin Industries, Ltd.Inventors: Takashi Shimizu, Kazutaka Hori, Hirofumi Higashi
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Patent number: 9290695Abstract: An etching solution includes: phosphoric acid having concentration of 30% by weight to 80% by weight; nitric acid having concentration of 10% by weight or less; and surfactant having concentration of 0.0005% by weight to 0.0050% by weight, wherein the etching solution is used for etching an aluminum oxide film having film density of 2.80 g/cm3 to 3.25 g/cm3.Type: GrantFiled: March 7, 2014Date of Patent: March 22, 2016Assignee: JOLED INCInventors: Hirofumi Higashi, Yoshiharu Hidaka
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Publication number: 20150176483Abstract: A variable compression ratio device for an internal combustion engine includes: a connecting rod, having a small end and a large end, wherein a support hole formed at the small end is pivotally supported by a support shaft of a piston that reciprocates in a cylinder, and a support hole formed at the large end is pivotally supported by a support shaft of a crankshaft; an eccentric sleeve that is rotatably installed between the support hole of the small end or the support hole of the large end and the support shaft, and displaces a center axis of the support hole of the small end or a center axis of the support hole of the large end with respect to a center axis the support shaft; and an actuator that drives and rotates the eccentric sleeve.Type: ApplicationFiled: December 23, 2014Publication date: June 25, 2015Applicants: MITSUBISHI JIDOSHA ENGINEERING KABUSHIKI KAISHA, MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHAInventors: Seiji MATSUDA, Hirofumi HIGASHI, Akira MIKITA
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Publication number: 20150099327Abstract: An etching solution includes: phosphoric acid having concentration of 30% by weight to 80% by weight; nitric acid having concentration of 10% by weight or less; and surfactant having concentration of 0.0005% by weight to 0.0050% by weight, wherein the etching solution is used for etching an aluminum oxide film having film density of 2.80 g/cm3 to 3.25 g/cm3.Type: ApplicationFiled: March 7, 2014Publication date: April 9, 2015Applicant: PANASONIC CORPORATIONInventors: Hirofumi Higashi, Yoshiharu Hidaka
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Publication number: 20150076467Abstract: A method of manufacturing a thin film transistor (TFT) substrate in which a TFT including an oxide semiconductor layer is formed, the method including: forming an insulating layer to cover the oxide semiconductor layer; and forming an opening in the insulating layer, wherein the insulating layer includes a first film, a second film which is provided above the first film and is an aluminum oxide film, and a third film which is provided above the second film and is a film including silicon, and the forming of an opening includes: forming a resist pattern above the third film; processing the third film by dry etching; and processing the second film by wet etching.Type: ApplicationFiled: June 19, 2013Publication date: March 19, 2015Applicant: PANASONIC CORPORATIONInventors: Atsushi Sasaki, Eiichi Satoh, Hirofumi Higashi
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Publication number: 20140021496Abstract: An EL display has a luminescence unit having a luminescence layer being disposed between the pair of electrodes, and a transistor array unit controlling the luminescence of the luminescence unit. An interlayer insulating film is disposed between the luminescence unit and the transistor array unit. An electrode of the luminescence unit is connected electrically to the transistor array unit via a contact hole provided in the interlayer insulation film. The transistor array unit has a wiring component made of copper or copper alloy. The wiring component has a lower layer pattern made of copper or copper alloy, and an upper layer pattern made of metal material different from that for the lower layer pattern. The upper layer pattern covers the upper surface and the side surface of the lower layer pattern.Type: ApplicationFiled: September 19, 2013Publication date: January 23, 2014Applicant: PANASONIC CORPORATIONInventors: Hirofumi HIGASHI, Yoshiharu HIDAKA, Nobuto HOSONO
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Patent number: 8616016Abstract: At a time of a heating high-load operation, a harmonic current is flown in an armature winding to induction-heat rare-earth magnets, thus reducing a residual magnetic flux density. Thereby, the number of rotations of a radial gap type motor is improved. The rare-earth magnets are provided near a cooling medium passage extending substantially in parallel with a flow line of a cooling medium, so that the cooling medium recovers heat of the heated rare-earth magnets. At a time of a cooling high-load operation, a greater number of rotations are obtained with respect to the same torque command value, by a field weakening control by means of a current-phase advance.Type: GrantFiled: June 8, 2009Date of Patent: December 31, 2013Assignee: Daikin Industries, Ltd.Inventors: Yoshinari Asano, Tomomi Sakamoto, Nobuyuki Kifuji, Hirofumi Higashi, Shintarou Araki