Patents by Inventor Tomotsugu Sugiyama
Tomotsugu Sugiyama 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: 11252837Abstract: A cooling apparatus includes a cold plate including a lower surface to be in contact with a heat-radiating component, and a first coolant passage in which a coolant flows, a radiator including fins to perform cooling and pipes each defining a second coolant passage in communication with the first coolant passage, a pump to circulate the coolant, a first tank joined to one end of each of the pipes, and a second tank to join another end of each of the pipes to the pump. The radiator is provided on the cold plate, and the pump is adjacent to the second tank.Type: GrantFiled: March 11, 2019Date of Patent: February 15, 2022Assignee: NIDEC CORPORATIONInventors: Nobuya Nakae, Akihiko Makita, Hidenobu Takeshita, Tomotsugu Sugiyama, Toshihiko Tokeshi, Takehito Tamaoka
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Patent number: 11236738Abstract: A cooling apparatus includes a cold plate including a lower surface to be in contact with a heat-radiating component, and a first coolant passage in which a coolant flows, a radiator including fins to perform cooling, and a second coolant passage in which the coolant flows, and a pump connected to each of the first coolant passage and the second coolant passage to circulate the coolant. The radiator is provided on the cold plate. The pump is adjacent to the radiator.Type: GrantFiled: March 11, 2019Date of Patent: February 1, 2022Assignee: NIDEC CORPORATIONInventors: Nobuya Nakae, Akihiko Makita, Hidenobu Takeshita, Tomotsugu Sugiyama
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Patent number: 10862409Abstract: A motor device includes motors, detector in the respective motors to detect motor rotational speeds, and an output controller configured or programmed to output a single output rotational speed based on the motor rotational speeds input from the detectors. The output controller multiplies at least one of the input motor rotational speeds by a coefficient derived based on target rotational speeds of the motors to calculate a conversion value, and determines the output rotational speed.Type: GrantFiled: February 6, 2019Date of Patent: December 8, 2020Assignee: NIDEC CORPORATIONInventors: Masayuki Kato, Tomotsugu Sugiyama, Guifeng Zhang, Takayuki Kinouchi
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Publication number: 20190307020Abstract: A cooling apparatus includes a cold plate including a lower surface to be in contact with a heat-radiating component, and a first coolant passage in which a coolant flows, a radiator including fins to perform cooling, and a second coolant passage in which the coolant flows, and a pump connected to each of the first coolant passage and the second coolant passage to circulate the coolant. The radiator is provided on the cold plate. The pump is adjacent to the radiator.Type: ApplicationFiled: March 11, 2019Publication date: October 3, 2019Inventors: Nobuya NAKAE, Akihiko MAKITA, Hidenobu TAKESHITA, Tomotsugu SUGIYAMA
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Publication number: 20190307019Abstract: A cooling apparatus includes a cold plate including a lower surface to be in contact with a heat-radiating component, and a first coolant passage in which a coolant flows, a radiator including fins to perform cooling and pipes each defining a second coolant passage in communication with the first coolant passage, a pump to circulate the coolant, a first tank joined to one end of each of the pipes, and a second tank to join another end of each of the pipes to the pump. The radiator is provided on the cold plate, and the pump is adjacent to the second tank.Type: ApplicationFiled: March 11, 2019Publication date: October 3, 2019Inventors: Nobuya NAKAE, Akihiko MAKITA, Hidenobu TAKESHITA, Tomotsugu SUGIYAMA, Toshihiko TOKESHI, Takehito TAMAOKA
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Publication number: 20190267917Abstract: A motor device includes motors, detector in the respective motors to detect motor rotational speeds, and an output controller configured or programmed to output a single output rotational speed based on the motor rotational speeds input from the detectors. The output controller multiplies at least one of the input motor rotational speeds by a coefficient derived based on target rotational speeds of the motors to calculate a conversion value, and determines the output rotational speed.Type: ApplicationFiled: February 6, 2019Publication date: August 29, 2019Inventors: Masayuki KATO, Tomotsugu SUGIYAMA, Guifeng ZHANG, Takayuki KINOUCHI
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Patent number: 9822787Abstract: A dynamic pressure bearing apparatus includes a bearing portion, a shaft, a radial dynamic pressure bearing portion, and a seal gap. An annular member arranged in an annular shape, fixed to the shaft axially between the seal portion and the attachment surface, and arranged to extend radially outward beyond an opening of the seal gap. A minute horizontal gap extending radially is defined between an upper surface of the bearing portion and a lower surface of the annular member. The seal gap is arranged to be in communication with an exterior space through the horizontal gap.Type: GrantFiled: February 24, 2016Date of Patent: November 21, 2017Assignee: NIDEC CORPORATIONInventors: Tomotsugu Sugiyama, Teiichi Hirono, Shinichiro Noda, Akihiro Kimura, Yoshiharu Ikegami, Tomohiro Hasegawa, Masafumi Fujimoto, Tomohiro Yoneda
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Patent number: 9670932Abstract: In a fan, a housing includes decreased thickness portions and increased thickness portions arranged alternately in a circumferential direction. A distance between a central axis and an edge increases from an air inlet toward an air outlet. An inner circumferential surface has a minimum radius smaller than a distance between the central axis and an outermost portion of the edge. At a boundary between upper and lower housing portions of the housing, the inner circumferential surface has a radius greater than the distance between the central axis and the outermost portion of the edge. The increased thickness portions include component fastening structures defining a fastening structure arranged to fit the upper and lower housing portions to each other.Type: GrantFiled: December 14, 2012Date of Patent: June 6, 2017Assignee: NIDEC CORPORATIONInventors: Kenji Iwamoto, Tomotsugu Sugiyama, Yoshiaki Oguma, Yasuyuki Kaji
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Patent number: 9551346Abstract: A fan includes a first motor portion, a first impeller fixed to a first rotating portion of the first motor portion, a second motor portion arranged along a central axis of the first motor portion, a second impeller fixed to a second rotating portion of the second motor portion, a tubular wind channel portion arranged to surround the first and second impellers, and support ribs arranged to join the wind channel portion to the first and second motor portions. The first impeller includes first blades arranged in a circumferential direction about the central axis and the second impeller includes second blades arranged in the circumferential direction, a rotation direction of the second impeller is opposite to a rotation direction of the first impeller. A surface of each first blade which faces the second impeller is concave. A surface of each second blade which faces the first impeller is concave.Type: GrantFiled: April 11, 2014Date of Patent: January 24, 2017Assignee: Nidec CorporationInventors: Jumpei Kitamura, Hidenobu Takeshita, Tomotsugu Sugiyama
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Publication number: 20160169242Abstract: A dynamic pressure bearing apparatus includes a bearing portion, a shaft, a radial dynamic pressure bearing portion, and a seal gap. An annular member arranged in an annular shape, fixed to the shaft axially between the seal portion and the attachment surface, and arranged to extend radially outward beyond an opening of the seal gap. A minute horizontal gap extending radially is defined between an upper surface of the bearing portion and a lower surface of the annular member. The seal gap is arranged to be in communication with an exterior space through the horizontal gap.Type: ApplicationFiled: February 24, 2016Publication date: June 16, 2016Applicant: NIDEC CORPORATIONInventors: Tomotsugu Sugiyama, Teiichi Hirono, Shinichiro Noda, Akihiro Kimura, Yoshiharu Ikegami, Tomohiro Hasegawa, Masafumi Fujimoto, Tomohiro Yoneda
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Patent number: 9303653Abstract: A dynamic pressure bearing apparatus includes a bearing portion; a shaft; a substantially annular bushing; a radial dynamic pressure bearing portion; and a seal gap. A minute horizontal gap extending radially is defined between an upper surface of the bearing portion and a lower surface of the bushing. The seal gap is arranged to be in communication with an exterior space through the horizontal gap.Type: GrantFiled: October 14, 2014Date of Patent: April 5, 2016Assignee: NIDEC CORPORATIONInventors: Tomotsugu Sugiyama, Teiichi Hirono, Shinichiro Noda, Akihiro Kimura, Yoshiharu Ikegami, Tomohiro Hasegawa, Masafumi Fujimoto, Tomohiro Yoneda
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Patent number: 9231454Abstract: A motor includes a stationary unit, a rotary unit, and a bearing unit. The stationary unit includes a stator, a PCB and a base member. The stator includes a stator core and coils. The stator is arranged radially outward of the bearing unit. The PCB includes through-hole portions, land portions and PCB fixing portions. The base member includes a stator holding portion arranged to hold the stator and a bearing holding portion arranged to hold the bearing unit. The rotary unit includes a shaft positioned radially inward of the bearing unit and a magnet opposed to a circumferential surface of the stator core. The through-hole portions are arranged along a circumferential direction of the PCB. At least a portion of the PCB axially overlaps with the bearing unit. The PCB fixing portions are arranged radially outward of the through-hole portions.Type: GrantFiled: April 2, 2014Date of Patent: January 5, 2016Assignee: NIDEC CORPORATIONInventors: Tomotsugu Sugiyama, Hidenobu Takeshita, Tsukasa Takaoka, Norihisa Hino, Libin Zhu, Xianglin Li, Yu Chen
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Patent number: 9109607Abstract: A motor arranged to rotate an impeller includes a rotor magnet fixed to a shaft, and a stator arranged opposite to the rotor magnet. The motor is arranged on an axially lower side of an impeller cup. The stator is fixed to an inner circumferential surface of a stator support portion. An opening-side end portion of the impeller cup is arranged opposite to an upper surface of the stator support portion. The upper surface of the stator support portion includes an expanded portion defined in a portion thereof which is opposed to the opening-side end portion of the impeller cup. The expanded portion is preferably located a greater distance from the opening-side end portion of the impeller cup than a distance between the opening-side end portion and a remaining portion of the upper surface of the stator support portion.Type: GrantFiled: October 20, 2011Date of Patent: August 18, 2015Assignee: Nidec CorporationInventors: Hidenobu Takeshita, Tomotsugu Sugiyama
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Publication number: 20150030481Abstract: A dynamic pressure bearing apparatus includes a bearing portion; a shaft; a substantially annular bushing; a radial dynamic pressure bearing portion; and a seal gap. A minute horizontal gap extending radially is defined between an upper surface of the bearing portion and a lower surface of the bushing. The seal gap is arranged to be in communication with an exterior space through the horizontal gap.Type: ApplicationFiled: October 14, 2014Publication date: January 29, 2015Applicant: NIDEC CORPORATIONInventors: Tomotsugu Sugiyama, Teiichi Hirono, Shinichiro Noda, Akihiro Kimura, Yoshiharu Ikegami, Tomohiro Hasegawa, Masafumi Fujimoto, Tomohiro Yoneda
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Publication number: 20140363272Abstract: A fan includes a first motor portion, a first impeller fixed to a first rotating portion of the first motor portion, a second motor portion arranged along a central axis of the first motor portion, a second impeller fixed to a second rotating portion of the second motor portion, a tubular wind channel portion arranged to surround the first and second impellers, and support ribs arranged to join the wind channel portion to the first and second motor portions. The first impeller includes first blades arranged in a circumferential direction about the central axis and the second impeller includes second blades arranged in the circumferential direction, a rotation direction of the second impeller is opposite to a rotation direction of the first impeller. A surface of each first blade which faces the second impeller is concave. A surface of each second blade which faces the first impeller is concave.Type: ApplicationFiled: April 11, 2014Publication date: December 11, 2014Applicant: Nidec CorporationInventors: Jumpei KITAMURA, Hidenobu TAKESHITA, Tomotsugu SUGIYAMA
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Publication number: 20140300255Abstract: A motor includes a stationary unit, a rotary unit, and a bearing unit. The stationary unit includes a stator, a PCB and a base member. The stator includes a stator core and coils. The stator is arranged radially outward of the bearing unit. The PCB includes through-hole portions, land portions and PCB fixing portions. The base member includes a stator holding portion arranged to hold the stator and a bearing holding portion arranged to hold the bearing unit. The rotary unit includes a shaft positioned radially inward of the bearing unit and a magnet opposed to a circumferential surface of the stator core. The through-hole portions are arranged along a circumferential direction of the PCB. At least a portion of the PCB axially overlaps with the bearing unit. The PCB fixing portions are arranged radially outward of the through-hole portions.Type: ApplicationFiled: April 2, 2014Publication date: October 9, 2014Applicant: NIDEC CORPORATIONInventors: Tomotsugu SUGIYAMA, Hidenobu TAKESHITA, Tsukasa TAKAOKA, Norihisa HINO, Libin ZHU, Xianglin LI, Yu CHEN
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Patent number: 8807967Abstract: A blower fan includes a shaft including an outer circumferential surface, a rotor magnet arranged to rotate about a rotation axis together with the shaft, a stator arranged radially outwards of the rotor magnet in an opposing relationship with the rotor magnet, a substantially cylindrical holder unit arranged to rotatably support the shaft through a bearing, and an impeller arranged to rotate together with the shaft. The bearing includes a pair of axially spaced-apart bearing units. The rotor magnet and the stator are arranged between the bearing units. The bearing units and the stator are held on an inner circumferential surface of the holder unit.Type: GrantFiled: October 27, 2011Date of Patent: August 19, 2014Assignee: Nidec CorporationInventors: Hidenobu Takeshita, Tomotsugu Sugiyama
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Publication number: 20130004348Abstract: A dynamic pressure bearing apparatus includes a bearing portion; a shaft; a substantially annular bushing; a radial dynamic pressure bearing portion; and a seal gap. A minute horizontal gap extending radially is defined between an upper surface of the bearing portion and a lower surface of the bushing. The seal gap is arranged to be in communication with an exterior space through the horizontal gap.Type: ApplicationFiled: June 14, 2012Publication date: January 3, 2013Applicant: NIDEC CORPORATIONInventors: Tomotsugu Sugiyama, Teiichi Hirono, Shinichiro Noda, Akihiro Kimura, Yoshiharu Ikegami, Tomohiro Hasegawa, Masafumi Fujimoto, Tomohiro Yoneda
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Publication number: 20120269665Abstract: A motor arranged to rotate an impeller includes a rotor magnet fixed to a shaft, and a stator arranged opposite to the rotor magnet. The motor is arranged on an axially lower side of an impeller cup. The stator is fixed to an inner circumferential surface of a stator support portion. An opening-side end portion of the impeller cup is arranged opposite to an upper surface of the stator support portion. The upper surface of the stator support portion includes an expanded portion defined in a portion thereof which is opposed to the opening-side end portion of the impeller cup. The expanded portion is preferably located a greater distance from the opening-side end portion of the impeller cup than a distance between the opening-side end portion and a remaining portion of the upper surface of the stator support portion.Type: ApplicationFiled: October 20, 2011Publication date: October 25, 2012Applicant: NIDEC CORPORATIONInventors: Hidenobu TAKESHITA, Tomotsugu SUGIYAMA
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Publication number: 20120107156Abstract: A blower fan includes a shaft including an outer circumferential surface, a rotor magnet arranged to rotate about a rotation axis together with the shaft, a stator arranged radially outwards of the rotor magnet in an opposing relationship with the rotor magnet, a substantially cylindrical holder unit arranged to rotatably support the shaft through a bearing, and an impeller arranged to rotate together with the shaft. The bearing includes a pair of axially spaced-apart bearing units. The rotor magnet and the stator are arranged between the bearing units. The bearing units and the stator are held on an inner circumferential surface of the holder unit.Type: ApplicationFiled: October 27, 2011Publication date: May 3, 2012Applicant: NIDEC CORPORATIONInventors: Hidenobu Takeshita, Tomotsugu Sugiyama