Patents by Inventor Naohiro NAGASAWA
Naohiro 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: 11146130Abstract: This motor includes a stationary portion including a stator; and a rotating portion supported to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion, and including a shaft arranged to extend along the central axis. The stationary portion includes a bearing arranged to rotatably support the shaft, and a base portion arranged to hold the stator. The rotating portion includes a rotor hub portion arranged to extend in an annular shape around the shaft; a magnet directly or indirectly fixed to the rotor hub portion, and arranged opposite to the stator; a flywheel arranged axially above the rotor hub portion; and a seal portion arranged to have a thickness smaller than the thickness of the magnet. At least a portion of an outer circumferential surface of the rotor hub portion is a metal surface.Type: GrantFiled: September 16, 2019Date of Patent: October 12, 2021Assignee: Valve CorporationInventors: Junya Mizukami, Yoichi Sekii, Takeyuki Shuto, Naohiro Nagasawa
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Publication number: 20200014263Abstract: This motor includes a stationary portion including a stator; and a rotating portion supported to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion, and including a shaft arranged to extend along the central axis. The stationary portion includes a bearing arranged to rotatably support the shaft, and a base portion arranged to hold the stator. The rotating portion includes a rotor hub portion arranged to extend in an annular shape around the shaft; a magnet directly or indirectly fixed to the rotor hub portion, and arranged opposite to the stator; a flywheel arranged axially above the rotor hub portion; and a seal portion arranged to have a thickness smaller than the thickness of the magnet. At least a portion of an outer circumferential surface of the rotor hub portion is a metal surface.Type: ApplicationFiled: September 16, 2019Publication date: January 9, 2020Inventors: Junya Mizukami, Yoichi Sekii, Takeyuki Shuto, Naohiro Nagasawa
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Patent number: 10476329Abstract: This motor includes a stationary portion including a stator; and a rotating portion supported to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion, and including a shaft arranged to extend along the central axis. The stationary portion includes a bearing arranged to rotatably support the shaft, and a base portion arranged to hold the stator. The rotating portion includes a rotor hub portion arranged to extend in an annular shape around the shaft; a magnet directly or indirectly fixed to the rotor hub portion, and arranged opposite to the stator; a flywheel arranged axially above the rotor hub portion; and a seal portion arranged to have a thickness smaller than the thickness of the magnet. At least a portion of an outer circumferential surface of the rotor hub portion is a metal surface.Type: GrantFiled: July 5, 2017Date of Patent: November 12, 2019Assignee: VALVE CORPORATIONInventors: Junya Mizukami, Yoichi Sekii, Takeyuki Shuto, Naohiro Nagasawa
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Patent number: 10418871Abstract: This motor includes a stationary portion including a stator; and a rotating portion supported to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion, and including a shaft arranged to extend along the central axis. The stationary portion includes a bearing arranged to rotatably support the shaft, and a base portion arranged to hold the stator. The rotating portion includes a rotor hub portion arranged to extend in an annular shape around the shaft; a magnet directly or indirectly fixed to the rotor hub portion, and arranged opposite to the stator; a flywheel arranged axially above the rotor hub portion; and a seal portion arranged to have a thickness smaller than the thickness of the magnet. At least a portion of an outer circumferential surface of the rotor hub portion is a metal surface.Type: GrantFiled: July 5, 2017Date of Patent: September 17, 2019Assignee: NIDEC CORPORATIONInventors: Junya Mizukami, Yoichi Sekii, Takeyuki Shuto, Naohiro Nagasawa
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Publication number: 20190131857Abstract: A motor includes a stationary portion including a stator, and a rotating portion supported to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion. The rotating portion includes a rotor hub portion extending in an annular shape around the central axis, a magnet including a pole surface radially opposite to the stator, a yoke fixed to a radial outside of the magnet and connected to the rotor hub portion, a first seal portion extending in an annular shape around the yoke, and a flywheel located on one side of the rotor hub portion in an axial direction. At least a portion of a lower surface of the yoke defines a first metal surface that has a reflectivity higher than a reflectivity of an outer circumferential surface of the flywheel and a reflectivity of the first seal portion. At least a portion of the first metal surface is covered with the first seal portion.Type: ApplicationFiled: September 28, 2018Publication date: May 2, 2019Inventor: Naohiro NAGASAWA
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Patent number: 10177625Abstract: A motor includes a rotating portion. The rotating portion includes a shaft, a rotor hub, and a flywheel. The rotor hub is arranged to extend in an annular shape around the shaft. The flywheel is arranged axially above the rotor hub. The rotor hub includes a joining portion fixed to an outer circumferential surface of the shaft. A center of gravity of the rotating portion and the joining portion of the rotor hub are arranged to radially overlap with each other. The center of gravity of the rotating portion is arranged axially above a radial bearing portion and at a level equivalent to the level of the joining portion.Type: GrantFiled: May 31, 2016Date of Patent: January 8, 2019Assignee: NIDEC CORPORATIONInventors: Yoichi Sekii, Naohiro Nagasawa
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Publication number: 20180054102Abstract: This motor includes a stationary portion including a stator; and a rotating portion supported to be rotatable about a central axis extending in a vertical direction with respect to the stationary portion, and including a shaft arranged to extend along the central axis. The stationary portion includes a bearing arranged to rotatably support the shaft, and a base portion arranged to hold the stator. The rotating portion includes a rotor hub portion arranged to extend in an annular shape around the shaft; a magnet directly or indirectly fixed to the rotor hub portion, and arranged opposite to the stator; a flywheel arranged axially above the rotor hub portion; and a seal portion arranged to have a thickness smaller than the thickness of the magnet. At least a portion of an outer circumferential surface of the rotor hub portion is a metal surface.Type: ApplicationFiled: July 5, 2017Publication date: February 22, 2018Inventors: Junya MIZUKAMI, Yoichi SEKII, Takeyuki SHUTO, Naohiro NAGASAWA
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Patent number: 9879691Abstract: A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet.Type: GrantFiled: August 7, 2015Date of Patent: January 30, 2018Assignee: NIDEC CORPORATIONInventors: Junya Mizukami, Hideki Nishimura, Yoshito Nishitani, Michihiro Ito, Naohiro Nagasawa
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Publication number: 20160359391Abstract: A motor includes a rotating portion. The rotating portion includes a shaft, a rotor hub, and a flywheel. The rotor hub is arranged to extend in an annular shape around the shaft. The flywheel is arranged axially above the rotor hub. The rotor hub includes a joining portion fixed to an outer circumferential surface of the shaft. A center of gravity of the rotating portion and the joining portion of the rotor hub are arranged to radially overlap with each other. The center of gravity of the rotating portion is arranged axially above a radial bearing portion and at a level equivalent to the level of the joining portion.Type: ApplicationFiled: May 31, 2016Publication date: December 8, 2016Inventors: Yoichi SEKII, Naohiro NAGASAWA
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Publication number: 20160053769Abstract: A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet. The rotor portion includes a through hole arranged to pass therethrough in an axial direction.Type: ApplicationFiled: August 7, 2015Publication date: February 25, 2016Inventors: Junya MIZUKAMI, Hideki NISHIMURA, Yoshito NISHITANI, Michihiro ITO, Naohiro NAGASAWA
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Publication number: 20160053770Abstract: A pump a shaft portion arranged to extend in a vertical direction; a rotor portion arranged to surround an outer circumference of the shaft portion, and including a magnet; and a housing joined to the shaft portion, and arranged to contain the rotor portion. The housing includes a stator arranged opposite to the magnet; a rotor accommodating portion arranged to accommodate the rotor portion; and an inlet and an outlet each of which is arranged to pass through a portion of the rotor accommodating portion. A surface of at least one of the rotor portion, the shaft portion, and the rotor accommodating portion includes at least one first dynamic pressure groove arranged to support rotation of the rotor portion. A surface of at least one of the rotor portion and the rotor accommodating portion includes at least one second dynamic pressure groove arranged to transfer a fluid from the inlet to the outlet.Type: ApplicationFiled: August 7, 2015Publication date: February 25, 2016Inventors: Junya MIZUKAMI, Hideki NISHIMURA, Yoshito NISHITANI, Michihiro ITO, Naohiro NAGASAWA